4.7 Article

Fundamental cosmology from ANDES precision spectroscopy

Related references

Note: Only part of the references are listed.
Article Astronomy & Astrophysics

Redshift drift cosmography with ELT and SKAO measurements

B. A. R. Rocha et al.

Summary: Mapping the expansion history of the universe is an important task that can reveal the deficiencies in current cosmological and particle physics theories. Cosmography is a phenomenological approach that expands physical quantities using parameters such as redshift or logarithmic redshift. The redshift drift, measured by upcoming facilities, can provide valuable insight into cosmological models. By analyzing simulated redshift drift measurements, this study finds that the logarithmic-based expansions of spectroscopic velocity drift are the most reliable and can provide a stringent test for dark matter paradigms.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

Article Astronomy & Astrophysics

Spectroscopy of QUBRICS quasar candidates: 1672 new redshifts and a golden sample for the Sandage test of the redshift drift

Stefano Cristiani et al.

Summary: The QUBRICS survey aims to construct a sample of the brightest quasars with z > 2.5 observable in the Southern Hemisphere. Utilizing optical and IR wide-field surveys and Machine Learning techniques, QUBRICS generates thousands of bright quasar candidates, with only a few hundred confirmed through follow-up spectroscopy. By utilizing the Gaia Data Release 3 and a newly developed spectral energy distribution fitting technique, QUBRICS has measured 1672 new secure redshifts of candidates, with a typical uncertainty of s(z) = 0.02. This progress brings QUBRICS closer to its goal of providing a sample of bright quasars for cosmological redshift drift experiments.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

Article Astronomy & Astrophysics

Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE0515-4414

Michael T. Murphy et al.

Summary: This study presents a new constraint on the relative variations in the fine-structure constant α using high-resolution spectroscopy with the ESO VLT. The observations of the quasar HE 0515-4414 reveal narrow absorption components, allowing for a more robust analysis. The resulting measurement of Δα/α with parts-per-million (ppm) precision provides valuable insights into cosmological variations.

ASTRONOMY & ASTROPHYSICS (2022)

Article Astronomy & Astrophysics

Forecasting cosmic acceleration measurements using the Lyman-α forest

Chenxing Dong et al.

Summary: The study presents end-to-end simulations aiming to constrain the rate of change in the expansion history of the Universe through redshift drift of Lyman-alpha forest absorption lines. Results show that using a dedicated facility and designed observing plan, redshift drift can be detected with 3σ significance in 15 years.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Article Astronomy & Astrophysics

Fundamental physics with ESPRESSO: Constraints on Bekenstein and dark energy models from astrophysical and local probes*

C. J. A. P. Martins et al.

Summary: It is expected that dynamical scalar fields in an effective four-dimensional field theory couple to the theory's other degrees of freedom if no new symmetry is introduced to suppress these couplings. This coupling can lead to spacetime variations of the fine-structure constant, which can be tested through astrophysical measurements. In this study, using ESPRESSO and other contemporary measurements, as well as background cosmology data, laboratory atomic clock measurements, and weak equivalence principle measurements, constraints are placed on two classes of varying fine-structure constant models, resulting in significant improvements compared to previous constraints.

PHYSICAL REVIEW D (2022)

Article Astronomy & Astrophysics

Constraints on extended Bekenstein models from cosmological, astrophysical, and local data

Leo Vacher et al.

Summary: Searching for variations in nature's fundamental constants is crucial for advancing beyond the current standard model of physics. The Bekenstein model introduces a scalar field in a phenomenological way to explain cosmological variations of the fine-structure constant. By allowing couplings to other sectors of the Universe, the model is expected to reproduce low energy limits of various theories, but constraints on couplings of parts per million are imposed.

PHYSICAL REVIEW D (2022)

Article Astronomy & Astrophysics

Cosmological impact of redshift drift measurements

J. Esteves et al.

Summary: The redshift drift can be used as a model-independent probe of fundamental cosmology, but can also be used to constrain model parameters when combined with a specific fiducial model. Different methods for measuring redshift drift have varying levels of effectiveness in constraining different cosmological parameters such as matter density and dark energy equation of state. Trade-offs exist between optimizing for accurate redshift drift measurements and using those measurements to constrain cosmological parameters, which must be carefully considered in the design and construction of next-generation instruments.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

Article Astronomy & Astrophysics

Fundamental physics with ESPRESSO: Towards an accurate wavelength calibration for a precision test of the fine-structure constant

Tobias M. Schmidt et al.

Summary: Observations of metal absorption systems in distant quasar spectra can be used to study possible variations of the fine-structure constant throughout the history of the Universe. The new ultra-stable high-resolution spectrograph ESPRESSO is expected to provide substantial advances in this field without being limited by wavelength calibration systematics.

ASTRONOMY & ASTROPHYSICS (2021)

Article Physics, Multidisciplinary

Improved Limits for Violations of Local Position Invariance from Atomic Clock Comparisons

R. Lange et al.

Summary: A study compared two optical clocks based on Yb-171+ and measured the frequency ratio of their electric quadrupole and electric octupole transitions, finding improved accuracy. The study also analyzed potential violations of physical laws and improved limits on the temporal variations of fundamental constants and the proton-to-electron mass ratio.

PHYSICAL REVIEW LETTERS (2021)

Article Astronomy & Astrophysics

Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data

M. Martinelli et al.

Summary: In physically realistic dynamical dark energy models, including scalar-field-based ones like quintessence, coupling between the scalar field and other degrees of freedom is expected, which can lead to violations of fundamental principles like the weak equivalence principle. By extending previous constraints on dark energy models to a more realistic parameter space, researchers demonstrate the importance of combining Euclid data with other astrophysical measurements and local experiments to accurately test physically motivated paradigms. The inclusion of astrophysical and local data is shown to significantly improve the figure of merit in the Euclid dark energy model, emphasizing the need for complementary data sources to explore wider parameter spaces in cosmological studies.

ASTRONOMY & ASTROPHYSICS (2021)

Article Astronomy & Astrophysics

Distinguishing freezing and thawing dark energy models through measurements of the fine-structure constant

J. M. A. Vilas Boas et al.

ASTRONOMY & ASTROPHYSICS (2020)

Article Astronomy & Astrophysics

The ACCELERATION programme: I. Cosmology with the redshift drift

Ryan Cooke

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

Article Astronomy & Astrophysics

The Spectroscopic Follow-up of the QUBRICS Bright Quasar Survey

Konstantina Boutsia et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2020)

Article Astronomy & Astrophysics

Forecasts of redshift drift constraints on cosmological parameters

C. S. Alves et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

Review Physics, Multidisciplinary

The status of varying constants: a review of the physics, searches and implications

C. J. A. P. Martins

REPORTS ON PROGRESS IN PHYSICS (2017)

Article Astronomy & Astrophysics

TOWARD A DIRECT MEASUREMENT OF THE COSMIC ACCELERATION

Jeremy Darling

ASTROPHYSICAL JOURNAL LETTERS (2012)

Article Astronomy & Astrophysics

Probing dark energy with redshift drift

Matteo Martinelli et al.

PHYSICAL REVIEW D (2012)

Article Astronomy & Astrophysics

Complementarity of the redshift drift

B. Moraes et al.

PHYSICAL REVIEW D (2011)

Article Astronomy & Astrophysics

Constraining variations in the fine structure constant in the presence of early dark energy

Erminia Calabrese et al.

PHYSICAL REVIEW D (2011)

Review Astronomy & Astrophysics

Cosmic dynamics in the era of extremely large telescopes

J. Liske et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2008)

Article Astronomy & Astrophysics

The time evolution of cosmological redshift as a test of dark energy

A. Balbi et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2007)

Article Astronomy & Astrophysics

Exploring the dark energy redshift desert with the Sandage-Loeb test

Pier-Stefano Corasaniti et al.

PHYSICAL REVIEW D (2007)

Article Physics, Multidisciplinary

Limits of quintessence

RR Caldwell et al.

PHYSICAL REVIEW LETTERS (2005)

Article Physics, Multidisciplinary

Exploring the expansion history of the universe

EV Linder

PHYSICAL REVIEW LETTERS (2003)

Article Astronomy & Astrophysics

Evolution of the fine structure constant driven by dark matter and the cosmological constant

KA Olive et al.

PHYSICAL REVIEW D (2002)

Article Astronomy & Astrophysics

Accelerating universes with scaling dark matter

M Chevallier et al.

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2001)