4.7 Article

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

Related references

Note: Only part of the references are listed.
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

Varying fine-structure constant cosmography

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

Summary: Cosmography is used to constrain cosmological variations of the fine-structure constant α, with limitations imposed by high-redshift data and local laboratory tests. Strict constraints are obtained through a combination of atomic clock data, high-resolution astrophysical spectroscopy measurements, and model-dependent constraints.

PHYSICS LETTERS B (2022)

Article Astronomy & Astrophysics

A new era of fine structure constant measurements at high redshift

Dinko Milakovic et al.

Summary: New observations of the quasar HE0515-4414 were made using the HARPS spectrograph on the ESO 3.6m telescope with the assistance of a Laser Frequency Comb (LFC). Advanced techniques such as wavelength calibration using LFC and ThAr methods, spectral modeling with Artificial Intelligence, and assigning additional model parameters for individual absorption components were employed. The results show overall consistency with no variation in the measurements.

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 Astronomy & Astrophysics

ESPRESSO at VLT: On-sky performance and first results

F. Pepe et al.

Summary: ESPRESSO is a new high-resolution spectrograph on the VLT designed for exoplanet research and fundamental astrophysical experiments with unprecedented precision. It allows for ultra-high radial-velocity precision and extreme spectral fidelity, providing significant advancements in RV measurements and other fields.

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

Primordial nucleosynthesis with varying fundamental constants Solutions to the lithium problem and the deuterium discrepancy

M. Deal et al.

Summary: The success of primordial nucleosynthesis has been limited by the long-standing lithium problem. A self-consistent perturbative analysis is used to explore the problem and its possible solutions in the context of the latest observations and theoretical modeling. The research concludes that the lithium problem most likely has an astrophysical solution, while the Deuterium discrepancy provides a possible indication of new physics.

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

A bound on the C-12/C-13 ratio in near-pristine gas with ESPRESSO

Louise Welsh et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2020)

Article Astronomy & Astrophysics

Space test of the equivalence principle: first results of the MICROSCOPE mission

Pierre Touboul et al.

CLASSICAL AND QUANTUM GRAVITY (2019)

Article Astronomy & Astrophysics

New constraints on time-dependent variations of fundamental constants using Planck data

Luke Hart et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

Article Astronomy & Astrophysics

Constraining the dark energy models with &ITH&IT(&ITz&IT) data: An approach independent of &ITH&IT0

Fotios K. Anagnostopoulos et al.

PHYSICAL REVIEW D (2018)

Article Astronomy & Astrophysics

High-precision limit on variation in the fine-structure constant from a single quasar absorption system

S. M. Kotus et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

Correction Astronomy & Astrophysics

Precise limits on cosmological variability of the fine-structure constant with zinc and chromium quasar absorption lines (vol 461, pg 2461, 2016)

Michael T. Murphy et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

Article Astronomy & Astrophysics

Modelling long-range wavelength distortions in quasar absorption echelle spectra

V. Dumont et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

Article Astronomy & Astrophysics

Subaru Telescope limits on cosmological variations in the fine-structure constant

Michael T. Murphy et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

Article Astronomy & Astrophysics

Artificial intelligence applied to the automatic analysis of absorption spectra. Objective measurement of the fine structure constant

Matthew B. Bainbridge et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

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

Precise limits on cosmological variability of the fine-structure constant with zinc and chromium quasar absorption lines

Michael T. Murphy et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

Article Astronomy & Astrophysics

Fine-structure constant constraints on dark energy. II. Extending the parameter space

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

PHYSICAL REVIEW D (2016)

Article Astronomy & Astrophysics

Current and future constraints on Bekenstein-type models for varying couplings

A. C. O. Leite et al.

PHYSICAL REVIEW D (2016)

Article Astronomy & Astrophysics

Impact of instrumental systematic errors on fine-structure constant measurements with quasar spectra

Jonathan B. Whitmore et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2015)

Article Astronomy & Astrophysics

The UVES Large Program for testing fundamental physics - III. Constraints on the fine-structure constant from three telescopes

T. M. Evans et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

Article Astronomy & Astrophysics

Dark energy coupling with electromagnetism as seen from future low-medium redshift probes

E. Calabrese et al.

PHYSICAL REVIEW D (2014)

Article Physics, Particles & Fields

Varying Constants, Gravitation and Cosmology

Jean-Philippe Uzan

Living Reviews in Relativity (2013)

Article Astronomy & Astrophysics

First measurement of Mg isotope abundances at high redshifts and accurate estimate of Δα/α

I. I. Agafonova et al.

ASTRONOMY & ASTROPHYSICS (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)

Article Physics, Multidisciplinary

Indications of a Spatial Variation of the Fine Structure Constant

J. K. Webb et al.

PHYSICAL REVIEW LETTERS (2011)

Article Astronomy & Astrophysics

Phenomenology of the equivalence principle with light scalars

Thibault Damour et al.

CLASSICAL AND QUANTUM GRAVITY (2010)

Article Physics, Multidisciplinary

Exploring the expansion history of the universe

EV Linder

PHYSICAL REVIEW LETTERS (2003)

Article Physics, Multidisciplinary

Runaway dilaton and equivalence principle violations

T Damour et al.

PHYSICAL REVIEW LETTERS (2002)

Article Physics, Multidisciplinary

A simple cosmology with a varying fine structure constant

HB Sandvik et al.

PHYSICAL REVIEW LETTERS (2002)

Letter Physics, Multidisciplinary

Quintessence cosmology and varying alpha

T Chiba et al.

PROGRESS OF THEORETICAL PHYSICS (2002)

Article Astronomy & Astrophysics

Accelerating universes with scaling dark matter

M Chevallier et al.

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2001)