Low-redshift constraints on homogeneous and isotropic universes with torsion
Sign Up to like & getrecommendations! Published in 2019 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2019.100416
Abstract: Abstract One of the possible extensions of Einstein’s General Theory of Relativity consists in allowing for the presence of spacetime torsion. The form of the underlying torsion tensor can be chosen such that the homogeneity… read more here.
Keywords: constraints homogeneous; low redshift; torsion; homogeneous isotropic ... See more keywords
Low redshift constraints on scale-covariant models
Sign Up to like & getrecommendations! Published in 2022 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2022.100964
Abstract: The search for a physical model which explains the observed recent acceleration of the universe is a compelling task of modern fundamental cosmology. Recently Fernandes et al. presented low redshift observational constraints on a scale… read more here.
Keywords: constraints scale; redshift constraints; cosmological constant; low redshift ... See more keywords
Parameter discordance in Planck CMB and low-redshift measurements: projection in the primordial power spectrum
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/04/036
Abstract: We discuss the discordance between the estimated values of the cosmological parameters from Planck assuming the concordance $\Lambda$CDM model and low-redshift measurements. In particular, we consider the Hubble constant mismatch between Planck temperature constraint for… read more here.
Keywords: discordance; low redshift; primordial power; cosmology ... See more keywords
Bounds on WIMP dark matter from galaxy clusters at low redshift
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1127
Abstract: In this work we study the cross-correlation between Fermi-LAT diffuse γ-ray maps and galaxy cluster catalogues in order to search for a diffuse dark matter signal. We employ an accurate estimation of the error covariance… read more here.
Keywords: matter; wimp dark; dark matter; low redshift ... See more keywords
Low-redshift tests of Newtonian cosmologies with a time-varying gravitational constant
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2310
Abstract: In this work, we investigate Newtonian cosmologies with a time-varying gravitational constant, $G(t)$. We examine whether such models can reproduce the low-redshift cosmological observations without a cosmological constant, or any other sort of explicit dark… read more here.
Keywords: low redshift; gravitational constant; newtonian cosmologies; cosmologies time ... See more keywords
Structure formation simulations with momentum exchange: alleviating tensions between high-redshift and low-redshift cosmological probes
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stw2702
Abstract: Persisting tensions between the cosmological constraints derived from low-redshift probes and the ones obtained from temperature and polarisation anisotropies of the Cosmic Microwave Background -- although not yet providing compelling evidence against the $\Lambda $CDM… read more here.
Keywords: low redshift; momentum exchange; simulations momentum; formation simulations ... See more keywords
An accurate low-redshift measurement of the cosmic neutral hydrogen density
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz2038
Abstract: Using a spectral stacking technique, we measure the neutral hydrogen (H i) properties of a sample of galaxies at z < 0.11 across 35 pointings of the Westerbork Synthesis Radio Telescope. The radio data contain 1895… read more here.
Keywords: accurate low; low redshift; neutral hydrogen; density ... See more keywords
BAT AGN Spectroscopic Survey – XIII. The nature of the most luminous obscured AGN in the low-redshift universe
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz2309
Abstract: We present a multiwavelength analysis of 28 of the most luminous low-redshift narrow-line, ultra-hard X-ray-selected active galactic nuclei (AGN) drawn from the 70-month Swift/BAT all-sky survey, with bolometric luminosities of $\log (L_{\rm bol} /{\rm erg\,… read more here.
Keywords: bat agn; low redshift; survey; obscured agn ... See more keywords
Measuring the sound horizon and absolute magnitude of SNIa by maximizing the consistency between low-redshift data sets
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.105.043528
Abstract: The comoving sound horizon at the baryon drag epoch, rd, encapsulates very important physical information about the pre-recombination era and serves as a cosmic standard ruler. On the other hand, the absolute magnitude of supernovae… read more here.
Keywords: absolute magnitude; snia; sound horizon; low redshift ... See more keywords
Constraining constant and tomographic coupled dark energy with low-redshift and high-redshift probes
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.083503
Abstract: We consider coupled dark energy (CDE) cosmologies, where dark matter particles feel a force stronger than gravity, due to the fifth force mediated by a scalar field which plays the role of dark energy. We… read more here.
Keywords: constant tomographic; dark energy; low redshift; coupled dark ... See more keywords