Results 21 to 30 of about 13,060 (254)
Mit eROSITA und eBOSS auf der Jagd nach Dunkler Materie und Energie
Physik in unserer Zeit, Volume 53, Issue 2, Page 64-71, March 2022., 2022 Das Röntgenteleskop eROSITA auf der russisch‐deutschen Weltraummission SRG ist seit seinem Start im Juli 2019 extrem erfolgreich in der Kartographierung des Röntgenhimmels. In Kombination mit SDSS, einem optischen Teleskop in New Mexico, USA, kann man die Entwicklung der Materieverteilung im Universum mit hoher Präzision und über einen Zeitraum von ...
Johan Comparat, Peter Predehl
wiley +1 more source
Progress and Challenges in Electromechanical Coupling of Radio Telescopes
International Journal of Antennas and Propagation, Volume 2022, Issue 1, 2022., 2022 Radio astronomy is a discipline of dynamics and wonders. The vast universe has many secrets to unravel. As one of the important facilities in this discipline, radio telescopes play a key role in collecting astronomical data and unraveling mysteries.
Yuefei Yan +10 more
wiley +1 more source
Baryon acoustic oscillations [PDF]
, 2010 Baryon Acoustic Oscillations (BAO) are frozen relics left over from the pre-decoupling universe. They are the standard rulers of choice for 21st century cosmology, providing distance estimates that are, for the first time, firmly rooted in well-understood, linear physics.
Bassett, Bruce A., Hlozek, Renée
openaire +2 more sources
Phenomenology of Trimaximal Mixing with One Texture Equality
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 We study neutrino mass matrices with one texture equality and the neutrino mixing matrix having either its first (TM1) or second (TM2) column identical to that of the tribimaximal mixing matrix. We found that out of total fifteen possible neutrino mass matrices with one texture equality, only six textures are compatible with TM1 mixing and six textures
S. Dev, Desh Raj, Omar G. Miranda
wiley +1 more source
Weak lensing of baryon acoustic oscillations [PDF]
Physical Review D, 2007 Baryon Acoustic Oscillations (BAO) have recently been observed in the distribution of distant galaxies. The height and location of the BAO peak are strong discriminators of cosmological parameters. Here we consider the ways in which weak gravitational lensing distorts the BAO signal. We find two effects that can affect the height of the BAO peak in the
Vallinotto, Alberto +3 more
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The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests [PDF]
The Astrophysical Journal, 2020 Abstract We present a measurement of baryonic acoustic oscillations (BAOs) from Lyα absorption and quasars at an effective redshift using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The 16th and final eBOSS data release (SDSS DR16) contains all
Hélion du Mas des Bourboux +38 more
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Analytic approach to baryon acoustic oscillations [PDF]
Physical Review D, 2011 The fitting formula for the location of the first acoustic peak in the matter power spectrum is revised. We discuss the physics that leads to baryon acoustic oscillations: the recombination history, the tight coupling approximation and the velocity overshoot effect.
Montanari F, Durrer R
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Optimal Transport Reconstruction of Baryon Acoustic Oscillations
Physical Review Letters, 2022 A weighted, semi-discrete, fast optimal transport (OT) algorithm for reconstructing the Lagrangian positions of proto-halos from their evolved Eulerian positions is presented. The algorithm makes use of a mass estimate of the biased tracers and of the distribution of the remaining mass (the `dust'), but is robust to errors in the mass estimates.
Farnik Nikakhtar +3 more
openaire +4 more sources
Cosmological implications of baryon acoustic oscillation measurements [PDF]
Physical Review D, 2015 We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) and Type Ia supernova (SN) data. We take advantage of high-precision BAO measurements from galaxy clustering and the Ly-alpha forest (LyaF) in the BOSS survey of ...
Aubourg, Eric +95 more
openaire +13 more sources
3D spherical analysis of baryon acoustic oscillations [PDF]
Astronomy & Astrophysics, 2012 6 pages + Appendix. Astro-ph abstract is abridged. Updated with comments from anonymous referee. Corrected axes of Figure 2. Extended discussion of radialisation.
Rassat, A., Refregier, A.
openaire +2 more sources