Results 41 to 50 of about 13,060 (254)
Bispectrum as baryon acoustic oscillation interferometer
Physical Review D, 2018 6 pages, 3 figures; revised to match published ...
Child, Hillary L +6 more
openaire +5 more sources
Baryon Acoustic Oscillations reconstruction with pixels [PDF]
Journal of Cosmology and Astroparticle Physics, 2017 34 pages, 17 figures.
Obuljen, Andrej +3 more
openaire +2 more sources
Generalized Phenomenological Models of Dark Energy
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 It was first observed at the end of the last century that the universe is presently accelerating. Ever since, there have been several attempts to explain this observation theoretically. There are two possible approaches. The more conventional one is to modify the matter part of the Einstein field equations, and the second one is to modify the geometry ...
Prasenjit Paul +2 more
wiley +1 more source
Early dark energy with power-law F(R) gravity
Physics Letters B, 2023 We study a power-law F(R) gravity with an early dark energy term, that can describe both the early-time and the late-time acceleration of the Universe.
Sergei D. Odintsov +2 more
doaj +1 more source
Nonlinear evolution of baryon acoustic oscillations
Physical Review D, 2008 18 pages, 8 figures, submitted to Phys. Rev. D. v2: We show that mode-coupling introduces out of phase oscillations that lead to shifts in the power spectrum nodes in the method of arXiv:0705 ...
Crocce, M., Scoccimarro, R.
openaire +2 more sources
Fermi Degenerate Antineutrino Star Model of Dark Energy
Advances in Astronomy, Volume 2020, Issue 1, 2020., 2020 When the Large Hadron Collider resumes operations in 2021, several experiments will directly measure the motion of antihydrogen in free fall for the first time. Our current understanding of the universe is not yet fully prepared for the possibility that antimatter has negative gravitational mass.
Tom F. Neiser, Zdzislaw E. Musielak
wiley +1 more source
Testing the consistency between cosmological measurements of distance and age
Physics Letters B, 2015 We present a model independent method to test the consistency between cosmological measurements of distance and age, assuming the distance duality relation.
Remya Nair, Sanjay Jhingan, Deepak Jain
doaj +1 more source
Baryon acoustic oscillations: A cosmological ruler [PDF]
Physics Today, 2017 A density pattern created by acoustic waves in the early universe can be seen in the distribution of galaxies and used as a standard ruler with which to measure cosmological expansion.
openaire +2 more sources
Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane
The Astronomical Journal, 2023 The Dark Energy Spectroscopic Instrument, consisting of 5020 robotic fiber positioners and associated systems on the Mayall telescope at Kitt Peak, Arizona, is carrying out a survey to measure the spectra of 40 million galaxies and quasars and produce ...
S. Kent +48 more
doaj +1 more source
Can f(R) gravity relieve $$H_0$$ H 0 and $$\sigma _8$$ σ 8 tensions?
European Physical Journal C: Particles and Fields, 2021 To investigate whether f(R) gravity can relieve current $$H_0$$ H 0 and $$\sigma _8$$ σ 8 tensions, we constrain the Hu-Sawicki f(R) gravity with Planck-2018 cosmic microwave background and redshift space distortions observations. We find that this model
Deng Wang
doaj +1 more source