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Primordial gravitational waves from NANOGrav: A broken power-law approach

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Primordial black holes from Gauss-Bonnet-corrected single field inflation

Shinsuke Kawai et al.

Summary: This study proposes an alternative mechanism for primordial black hole formation based on a scalar field coupled to the Gauss-Bonnet term, which not only leads to the production of primordial black holes but also sources gravitational waves at the second order.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Strongly magnetized hot QCD matter and stochastic gravitational wave background

Mohsen Khodadi et al.

Summary: This study investigates the impact of a strong magnetic field on the stochastic background of gravitational waves during the QCD phase transition. The findings suggest that while the magnetic field may alter the signal frequencies, the magnetized gravitational waves could still potentially be detected, especially with the expected sensitivities of future detectors such as SKA.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Consistency tests of ΛCDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension

Sunny Vagnozzi

Summary: New physics increasing the expansion rate before recombination is a possible solution to the Hubble tension, but there is currently no clear evidence for it in the CMB. General consistency tests of the ΛCDM model show that it fits CMB data well, posing a challenge for early-time new physics models.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Self-interacting neutrinos, the Hubble parameter tension, and the cosmic microwave background

Thejs Brinckmann et al.

Summary: The study comprehensively explores cosmological constraints on nonstandard neutrino self-interactions, revealing no compelling evidence for new neutrino interactions or nonstandard values of N-eff. In some cases, additional modes with neutrino decoupling occurring at lower redshifts were found. The effectiveness of solving the H-0 tension is not as strong as allowing a variable N-eff comprised of free-streaming particles.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Decoding the phases of early and late time reheating through imprints on primordial gravitational waves

Md Riajul Haque et al.

Summary: This study explores the effects of reheating on the spectrum of primordial gravitational waves observed today. It reveals that the perturbative decay of the inflaton leads to oscillations in the GW spectrum, potentially aiding in deciphering finer aspects of the reheating mechanism. Furthermore, it suggests that for specific values of the EoS parameter governing the secondary phase of reheating, the strength of GWs can match recent NANOGrav observations.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Implications of gravitational waves for supersymmetric grand unification

So Chigusa et al.

Summary: Supersymmetric grand unification based on SO(10) is favored by the detection of a stochastic gravitational wave background emitted by a network of cosmic strings. The observed spectrum may narrow the range of the cosmic string scale and restrict unified couplings and unification scale by requiring gauge coupling unification.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Gravitational waves from a dark U(1)D phase transition in light of NANOGrav 12.5 yr data

Debasish Borah et al.

Summary: The study explores the potential occurrence of a strong first-order phase transition below the electroweak scale in the U(1)(D) gauge extension of the standard model, which can be consistent with the data from the NANOGrav Collaboration. The model includes a complex singlet scalar and U(1)(D) vector boson, with the possibility of generating dark matter and light neutrino masses through the inclusion of additional fields.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Can we observe the QCD phase transition-generated gravitational waves through pulsar timing arrays?

Axel Brandenburg et al.

Summary: Numerical simulations were conducted on gravitational waves induced by hydrodynamic and hydromagnetic turbulent sources during QCD phase transitions, with the energy spectrum depending strongly on the nature of the turbulence, resulting in more power at low frequencies. The energy density of the gravitational waves was found to be about 10(-9) of the critical energy density in the nHz range today, and observations suggest that they may have already been detected by the NANOGrav Collaboration.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Loop decay in Abelian-Higgs string networks

Mark Hindmarsh et al.

Summary: The study found that in the Abelian-Higgs model, loops formed by intersections of infinite strings from random-field initial conditions disappear quickly, with lifetimes proportional to their initial rest-frame length. However, oscillating nonself intersecting loops constructed using a new method have lifetimes scaling differently. The study also shows differences in mean-square velocity and proposes a parameter to quantify uncertainty in loop survival.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

CMB from a Gauss-Bonnet-induced de Sitter fixed point

Shinsuke Kawai et al.

Summary: This study explores nontrivial fixed points in cosmological solutions with higher curvature terms in gravitational effective theories, focusing on a theory where a massive scalar field is nonminimally coupled to the Euler density. By analyzing the phase portrait of the dynamical system and computing the perturbation spectra, the study identifies parameter regions consistent with cosmological data and suggests that future observations may provide further constraints on the coupling function of the model. Additionally, brief comments are made on the swampland conjecture.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

NANOGrav signal from first-order confinement-deconfinement phase transition in different QCD-matter scenarios

Shou-Long Li et al.

Summary: Recently, an indicative evidence of a stochastic process has been reported, suggesting a potential stochastic gravitational wave signal. The first-order color charge confinement phase transition at the QCD scale could be a cosmological source for the NANOGrav signal, with future observations helping to distinguish between different scenarios.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Looking at the NANOGrav signal through the anthropic window of axionlike particles

Alexander S. Sakharov et al.

Summary: The study focuses on the inflationary dynamics of an axion like particle (ALP) field with a Peccci-Quinn-like phase transition occurring before the inflationary epoch. It explores how closed domain walls may leave imprints in the stochastic gravitational waves background and relates it to the NANOGrav signal excess. Through analysis of inflationary dynamics and isocurvature constraint, it reveals parameter combinations where signals from inflation-induced ALPs domain walls could match the NANOGrav excess amplitude.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo's third observing run

R. Abbott et al.

Summary: This study reports the results of a search for an isotropic gravitational-wave background using data from advanced detectors, placing upper limits on the strength of different types of gravitational-wave backgrounds. The study also explores the potential sources of correlated noise and compares the results to a fiducial model for the gravitational-wave background. Additionally, the study demonstrates the potential of combining results from individual mergers to provide stronger constraints on the merger rate of binary black holes.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Rescaled Einstein-Hilbert gravity from f (R) gravity: Inflation, dark energy, and the swampland criteria

V. K. Oikonomou

Summary: In this study, we analyze the scenario where the effective gravitational Lagrangian of a minimally coupled scalar field becomes a rescaled Einstein-Hilbert gravity at large curvatures, leading to changes in the inflationary phenomenology and satisfaction of swampland criteria. Two inflation models, fiber inflation and supergravity alpha-attractor models, are discussed to show their viability and satisfaction of swampland criteria. The late-time phenomenology of the fiber inflation potential in the presence of full f(R) gravity is examined, showing the production of a viable dark energy era similar to the Lambda-cold-dark-matter model. The modified gravity model presents a universe described by a rescaled Einstein-Hilbert gravity at early times, with the scalar field mainly controlling dynamics synergistically with f(R) gravity at late times.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Implications of the NANOGrav results for inflation

Sunny Vagnozzi

Summary: The NANOGrav pulsar timing array experiment provides evidence for a potential detection of a stochastic gravitational wave background, with implications for matching the upper limits set by BICEP2/Keck Array and Planck. Results suggest the existence of a parameter space related to big bang nucleosynthesis constraints.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

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Article Astronomy & Astrophysics

Massive black hole binary systems and the NANOGrav 12.5 yr results

H. Middleton et al.

Summary: NANOGrav has detected a common stochastic signal across a series of pulsars, potentially linked to a stochastic gravitational-wave background caused by unresolved massive black hole binaries. Using astronomical models and additional constraints, the merger rate and timescale of black hole binaries can be inferred, suggesting that a sufficiently large population of black holes will form and merge within a Hubble time.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

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Article Astronomy & Astrophysics

Comparing early dark energy and extra radiation solutions to the Hubble tension with BBN

Osamu Seto et al.

Summary: Introducing extra energy components can help alleviate the “Hubble tension,” but there are still some shortcomings in terms of BBN fit, with the extra radiation-EDE coexistence model giving the largest present Hubble parameter H0.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Cosmological constraints on Horava gravity revised in light of GW170817 and GRB170817A and the degeneracy with massive neutrinos

Noemi Frusciante et al.

Summary: In this study, we revise the cosmological limits on Horava gravity, while considering the constraints on the speed of propagation of gravitational waves and the relationship between massive neutrinos. The findings suggest that luminal propagation of gravitational waves can suppress large-scale CMB radiation temperature anisotropies, with massive neutrinos increasing this effect. Additionally, it is observed that massive neutrinos can compensate for modifications induced by Horava gravity, but there exists degeneracy with the tensor-to-scalar ratio r in theoretical levels.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Comparison of cosmic string and superstring models to NANOGrav 12.5-year results

Jose J. Blanco-Pillado et al.

Summary: This study compares the spectrum of stochastic gravitational wave background produced in various models of cosmic strings and discusses the theoretical uncertainties in computing such a background. Despite the uncertainties, cosmic strings are seen as a plausible explanation for the potential signal, with the consequences for cosmic string parameters depending on the specific model. Superstrings could also explain the signal, but only within a restricted parameter space where their network behavior is effectively the same as ordinary cosmic strings.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Evidence for different gravitational-wave sources in the NANOGrav dataset

Ligong Bian et al.

Summary: The NANOGrav Collaboration has provided strong evidence for a common-spectrum process in pulsar-timing data, suggesting it could be related to mergers of super massive black hole binaries or various stochastic gravitational-wave background sources in the early Universe. Bayesian analysis shows that the data favors cosmic strings as the gravitational-wave source over other possibilities.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory

Shadab Alam et al.

Summary: Based on the final measurements of clustering using galaxies, quasars, and Ly alpha forests from the SDSS lineage, this study provides comprehensive cosmological implications. The BAO data alone can rule out dark-energy-free models, and when combined with other measurements, significant improvements are made on constraining cosmological parameters within the ΛCDM model. The results indicate that various parameter extensions remain consistent with a ΛCDM model in a combined analysis, showing precision changes of less than 0.6% in key parameters.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Intermittent null energy condition violations during inflation and primordial gravitational waves

Yong Cai et al.

Summary: In a complex scenario of cosmic expansion, violation of the primordial null energy condition (NEC) can lead to different spectra on the gravitational wave background (GWB), including a blue-tilted spectrum and a Great Wall-like spectrum.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

QCD axion and gravitational waves in light of NANOGrav results

Nicklas Ramberg et al.

Summary: Research indicates that the NANOGrav team has found a stochastic gravitational wave background signal originating from a network of axionic strings in the early universe, related to a non-standard cosmological model with the dark matter particle QCD axion. The results suggest that under certain conditions, the gravitational wave spectrum from axionic strings is larger, the QCD axion mass is smaller, and the detection results of NANOGrav-12.5 years can be explained by the evolution of QCD axion field in a scenario similar to dust.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Implications of the NANOGrav result on primordial gravitational waves in nonstandard cosmologies

Sukannya Bhattacharya et al.

Summary: The NANOGrav Collaboration reported evidence of a common-spectrum stochastic process that may be the first detection of a stochastic gravitational wave background. The signal could be explained by first- and second-order gravitational waves in nonstandard cosmological history. The observation was ruled out in standard cosmology or nonstandard kination domination epochs, while standard radiation domination could explain the observation.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

NANOGrav signal from magnetohydrodynamic turbulence at the QCD phase transition in the early Universe

Andrii Neronov et al.

Summary: The NANOGrav Collaboration has recently reported evidence for the existence of a stochastic gravitational wave background in the 1-100 nHz frequency range, which could have been produced by magnetohydrodynamic turbulence at the QCD scale. The magnetic field parameters inferred from the NANOGrav measurement suggest a potential solution to the Hubble tension problem. The MHD turbulence interpretation of the NANOGrav signal can be further tested through measurements of the relic magnetic field.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

Eppur e piatto? The Cosmic Chronometers Take on Spatial Curvature and Cosmic Concordance

Sunny Vagnozzi et al.

Summary: Recent studies have discussed the question of whether the universe is spatially closed by combining Planck data with external data sets, ultimately concluding that the universe is spatially flat. By utilizing cosmic chronometers data to break the geometrical degeneracy, the study provides a stable estimate of the spatial curvature of the universe.

ASTROPHYSICAL JOURNAL (2021)

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Article Astronomy & Astrophysics

Higher-curvature corrections and tensor modes

William Giare et al.

Summary: This paper investigates the effects of higher-curvature corrections on the spectrum of primordial tensor perturbations. It shows that observable violation of the tensor consistency relation from higher-curvature tensors can lead to relatively large changes in tensor tilt. This may leave signatures in the tensor two-point function that can be tested to identify higher-curvature effects, especially if they result in a blue tilted spectrum visible in future gravitational wave experiments.

PHYSICAL REVIEW D (2021)

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Article Astronomy & Astrophysics

The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

Md F. Alam et al.

Summary: This study presents TOA measurements and timing models of 47 millisecond pulsars observed between 2004 and 2017. The data was collected at the Arecibo Observatory and the Green Bank Telescope by NANOGrav. The research includes narrowband analysis for calculating multiple TOAs within narrow radio-frequency bands.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2021)

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Article Astronomy & Astrophysics

Planck 2018 results: X. Constraints on inflation

Y. Akrami et al.

ASTRONOMY & ASTROPHYSICS (2020)

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Article Astronomy & Astrophysics

Planck 2018 results: VIII. Gravitational lensing

N. Aghanim et al.

ASTRONOMY & ASTROPHYSICS (2020)

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Review Physics, Nuclear

Primordial backgrounds of relic gravitons

Massimo Giovannini

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS (2020)

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Article Quantum Science & Technology

AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

Yousef Abou El-Neaj et al.

EPJ QUANTUM TECHNOLOGY (2020)

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Article Astronomy & Astrophysics

Planck 2018 results: VI. Cosmological parameters

N. Aghanim et al.

ASTRONOMY & ASTROPHYSICS (2020)

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Article Astronomy & Astrophysics

Precision early universe thermodynamics made simple: Neff and neutrino decoupling in the Standard Model and beyond

Miguel Escudero Abenza

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Astronomy & Astrophysics

Science case for the Einstein telescope

Michele Maggiore et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Astronomy & Astrophysics

Planck 2018 results: V. CMB power spectra and likelihoods

N. Aghanim et al.

ASTRONOMY & ASTROPHYSICS (2020)

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Article Physics, Particles & Fields

Dark fermions and spontaneous CP violation in SU(2)-axion inflation

Azadeh Maleknejad

JOURNAL OF HIGH ENERGY PHYSICS (2020)

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Article Astronomy & Astrophysics

A precision calculation of relic neutrino decoupling

Kensuke Akita et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Astronomy & Astrophysics

The missing link in gravitational-wave astronomy: discoveries waiting in the decihertz range

Manuel Arca Sedda et al.

CLASSICAL AND QUANTUM GRAVITY (2020)

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Article Physics, Particles & Fields

Rectifying Einstein-Gauss-Bonnet inflation in view of GW170817

S. D. Odintsov et al.

NUCLEAR PHYSICS B (2020)

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Article Astronomy & Astrophysics

A potential mechanism for inflation from swampland conjectures

Hao Geng

PHYSICS LETTERS B (2020)

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Article Astronomy & Astrophysics

Swampland implications of GW170817-compatible Einstein -Gauss -Bonnet gravity

S. D. Odintsov et al.

PHYSICS LETTERS B (2020)

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Editorial Material Astronomy & Astrophysics

Prospects for fundamental physics with LISA

Enrico Barausse et al.

GENERAL RELATIVITY AND GRAVITATION (2020)

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Article Astronomy & Astrophysics

How attractive is the isotropic attractor solution of axion-SU(2) inflation?

Ira Wolfson et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Physics, Particles & Fields

Trans-Planckian Censorship and the Swampland

Alek Bedroya et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

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Article Astronomy & Astrophysics

Small-scale tests of inflation

Laura Iacconi et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Astronomy & Astrophysics

Neutrino decoupling including flavour oscillations and primordial nucleosynthesis

Julien Froustey et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Physics, Multidisciplinary

Beyond the Standard Model Explanations of GW190521

Jeremy Sakstein et al.

PHYSICAL REVIEW LETTERS (2020)

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Article Astronomy & Astrophysics

From NANOGrav to LIGO with metastable cosmic strings

Wilfried Buchmuller et al.

PHYSICS LETTERS B (2020)

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Article Astronomy & Astrophysics

Implications of gravitational-wave production from dark photon resonance to pulsar-timing observations and effective number of relativistic species

Ryo Namba et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Nanohertz gravitational waves from a null-energy-condition violation in the early universe

Hiroaki W. H. Tahara et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background

Zaven Arzoumanian et al.

ASTROPHYSICAL JOURNAL LETTERS (2020)

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Article Astronomy & Astrophysics

Deconstructing the Planck TT Power Spectrum to Constrain Deviations from ?CDM

Joshua A. Kable et al.

ASTROPHYSICAL JOURNAL (2020)

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Article Astronomy & Astrophysics

Primordial black holes and gravitational waves from resonant amplification during inflation

Zihan Zhou et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

The H0 tension: ΔGN vs. ΔNeff

Guillermo Ballesteros et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Multidisciplinary Sciences

The baryon density of the Universe from an improved rate of deuterium burning

V. Mossa et al.

NATURE (2020)

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Article Astronomy & Astrophysics

Axion miniclusters in modified cosmological histories

Luca Visinelli et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Probes of gravitational waves with atom interferometers

John Ellis et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Neutrino puzzle: Anomalies, interactions, and cosmological tensions

Christina D. Kreisch et al.

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

New physics in light of the H0 tension: An alternative view

Sunny Vagnozzi

PHYSICAL REVIEW D (2020)

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Article Astronomy & Astrophysics

Towards a precision calculation of the effective number of neutrinos Neff in the Standard Model: the QED equation of state

Jack J. Bennett et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Article Astronomy & Astrophysics

The PHLEK Survey: A New Determination of the Primordial Helium Abundance

Tiffany Hsyu et al.

ASTROPHYSICAL JOURNAL (2020)

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Review Astronomy & Astrophysics

Fundamental physics with the Square Kilometre Array

A. Weltman et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA (2020)

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Article Astronomy & Astrophysics

The Parkes Pulsar Timing Array project: second data release

Matthew Kerr et al.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA (2020)

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Article Astronomy & Astrophysics

Can the H0 tension be resolved in extensions to ΛCDM cosmology?

Rui-Yun Guo et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2019)

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Article Astronomy & Astrophysics

The Simons Observatory: science goals and forecasts

Peter Ade et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2019)

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Article Astronomy & Astrophysics

The string swampland constraints require multi-field inflation

Ana Achucarro et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2019)

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Article Physics, Multidisciplinary

Eternal Inflation and the Refined Swampland Conjecture

William H. Kinney

PHYSICAL REVIEW LETTERS (2019)

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Article Astronomy & Astrophysics

Blue-tilted primordial gravitational waves from massive gravity

Tomohiro Fujita et al.

PHYSICS LETTERS B (2019)

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Article Astronomy & Astrophysics

Rescuing single field inflation from the swampland

Amjad Ashoorioon

PHYSICS LETTERS B (2019)

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Article Physics, Particles & Fields

Avoiding the string swampland in single-field inflation: excited initial states

Suddhasattwa Brahma et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Astronomy & Astrophysics

The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data

William H. Kinney et al.

CLASSICAL AND QUANTUM GRAVITY (2019)

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Article Astronomy & Astrophysics

Thermalisation of sterile neutrinos in the early universe in the 3+1 scheme with full mixing matrix

S. Gariazzo et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2019)

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Article Physics, Particles & Fields

Production and backreaction of spin-2 particles of SU(2) gauge field during inflation

A. Maleknejad et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Physics, Multidisciplinary

Measuring the tilt of primordial gravitational-wave power spectrum from observations

Jun Li et al.

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY (2019)

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Article Astronomy & Astrophysics

The International Pulsar Timing Array: second data release

B. B. P. Perera et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

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Article Physics, Particles & Fields

Bounds on slow roll and the de Sitter Swampland

Sumit K. Garg et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

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Article Astronomy & Astrophysics

Alive and well: mimetic gravity and a higher-order extension in light of GW170817

Alessandro Casalino et al.

CLASSICAL AND QUANTUM GRAVITY (2019)

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Article Astronomy & Astrophysics

Optimistic estimation on probing primordial gravitational waves with CMB B-mode polarization

Qing-Guo Huang et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

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Article Astronomy & Astrophysics

Distance and de Sitter conjectures on the Swampland

Hirosi Ooguri et al.

PHYSICS LETTERS B (2019)

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Article Astronomy & Astrophysics

Primordial gravitational waves and the H0-tension problem

Leila L. Graef et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Eternal inflation and swampland conjectures

Hiroki Matsui et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Search for the isotropic stochastic background using data from Advanced LIGO's second observing run

B. P. Abbott et al.

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Note on single-field inflation and the swampland criteria

Suratna Das

PHYSICAL REVIEW D (2019)

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Article Astronomy & Astrophysics

Warm inflation as a way out of the swampland

Meysam Motaharfar et al.

PHYSICAL REVIEW D (2019)

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Review Astronomy & Astrophysics

Cosmological backgrounds of gravitational waves

Chiara Caprini et al.

CLASSICAL AND QUANTUM GRAVITY (2018)

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Article Astronomy & Astrophysics

New limits on cosmic strings from gravitational wave observation

Jose J. Blanco-Pillado et al.

PHYSICS LETTERS B (2018)

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Article Physics, Multidisciplinary

A Note on Inflation and the Swampland

A. Kehagias et al.

FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS (2018)

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Article Astronomy & Astrophysics

Does the Hubble constant tension call for new physics?

Edvard Mortsell et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2018)

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Article Astronomy & Astrophysics

Limits on the number of spacetime dimensions from GW170817

Kris Pardo et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2018)

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Article Astronomy & Astrophysics

The H0 and σ8 tensions and the scale invariant spectrum

M. Benetti et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2018)

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Article Astronomy & Astrophysics

On the cosmological implications of the string Swampland

Prateek Agrawal et al.

PHYSICS LETTERS B (2018)

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Article Astronomy & Astrophysics

Non-Gaussianity from axion-gauge fields interactions during inflation

Emanuela Dimastrogiovanni et al.

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