Results 11 to 20 of about 13,060 (254)

Detecting Baryon Acoustic Oscillations [PDF]

The Astrophysical Journal, 2011
Baryon Acoustic Oscillations are a feature imprinted in the galaxy distribution by acoustic waves traveling in the plasma of the early universe. Their detection at the expected scale in large-scale structures strongly supports current cosmological models
A. Labatie, Albrecht, Arnalte-Mur, Bassett, Cabré, Eisenstein, Eisenstein, Eisenstein, Eisenstein, J. L. Starck, Kazin, Kerscher, Komatsu, M. Lachièze-Rey, Mallat, Pons-Bordería, Press, Reid, Seo, Strauss, Tian, Xu, York   +22 more
core   +6 more sources

Ho’oleilana: An Individual Baryon Acoustic Oscillation?

The Astrophysical Journal, 2023
Theory of the physics of the early hot universe leads to a prediction of baryon acoustic oscillations (BAOs) that has received confirmation from the pairwise separations of galaxies in samples of hundreds of thousands of objects.
R. Brent Tully, Cullan Howlett, Daniel Pomarède   +2 more
doaj   +3 more sources

Isocurvature modes and Baryon Acoustic Oscillations [PDF]

Journal of Cosmology and Astroparticle Physics, 2010
The measurement of Baryonic Acoustic Oscillations from galaxy surveys is well known to be a robust and powerful tool to constrain dark energy. This method relies on the knowledge of the size of the acoustic horizon at radiation drag derived from Cosmic ...
, , , , , , A.D. Linde, A.D. Linde, Anna Mangilli, D.J. Eisenstein, D.J. Eisenstein ., E. Komatsu ., E.P.S. Shellard, E.V. Linder, G. Barenboim, G. Efstathiou, H.-J. Seo, J. Hamann, L. Verde, L.L. Honorez, Licia Verde, Maria Beltran, P.J. E. Peebles, R. Keskitalo, V. Acquaviva, WMAP collaboration, WMAP collaboration, WMAP collaboration   +27 more
core   +4 more sources

Baryon Acoustic Oscillations Analyses with Density-split Statistics

The Astrophysical Journal
Accurate modeling for the evolution of the baryon acoustic oscillation (BAO) is essential for using it as a standard ruler to probe cosmology. We explore the nonlinearity of the BAO in different environments using the density-split statistics and compare
Tengpeng Xu, Yan-Chuan Cai, Yun Chen, Mark Neyrinck, Liang Gao, Qiao Wang   +5 more
doaj   +3 more sources

Streaming Velocities and the Baryon Acoustic Oscillation Scale [PDF]

Physical Review Letters, 2016
At the epoch of decoupling, cosmic baryons had supersonic velocities relative to the dark matter that were coherent on large scales. These velocities subsequently slow the growth of small-scale structure and, via feedback processes, can influence the formation of larger galaxies.
J. Blazek, Joseph E. McEwen, Christopher M. Hirata   +2 more
openalex   +5 more sources

Accurate Baryon Acoustic Oscillations reconstruction via semi-discrete optimal transport

Physical Review Letters, 2021
Optimal transport theory has recently reemerged as a vastly resourceful field of mathematics with elegant applications across physics and computer science. Harnessing methods from geometry processing, we report on the efficient implementation for a specific problem in cosmology -- the reconstruction of the linear density field from low redshifts, in ...
Sebastian von Hausegger, Bruno Lévy, Roya Mohayaee   +2 more
openalex   +4 more sources

Optimal redshift weighting for baryon acoustic oscillations [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Future baryon acoustic oscillation (BAO) surveys will survey very large volumes, covering wide ranges in redshift. We derive a set of redshift weights to compress the information in the redshift direction to a small number of modes. We suggest that such a compression preserves almost all of the signal for most cosmologies, while giving high signal-to ...
Fangzhou Zhu, Nikhil Padmanabhan, Martin White   +2 more
openalex   +5 more sources

Scalar Field Evolution at Background and Perturbation Levels for a Broad Class of Potentials

Fortschritte der Physik, Volume 71, Issue 10-11, November 2023., 2023
Abstract In this paper, a non‐interacting scalar field cosmology with an arbitrary potential using the f‐deviser method that relies on the differentiability properties of the potential is investigated. Using this alternative mathematical approach, a unified dynamical system analysis at a scalar field's background and perturbation levels with arbitrary ...
Genly Leon, Saikat Chakraborty, Sayantan Ghosh, Raja Solanki, P.K. Sahoo, Esteban González   +5 more
wiley   +1 more source

Effect of the metallicity of the intergalactic medium in the Lyman‐α forest correlation function

Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023
Abstract The Lyman‐α (Lyα) forest allows to constraint cosmological parameters at redshifts above 1.8$$ 1.8 $$ using the technique of standard rulers determined by baryon acoustic oscillations. This makes it an important tracer for the study of the universe at high redshift.
Andrea Muñoz‐Gutiérrez, Axel de la Macorra   +1 more
wiley   +1 more source

Theoretical and Experimental Challenges in the Measurement of Neutrino Mass

Advances in High Energy Physics, Volume 2023, Issue 1, 2023., 2023
Neutrino masses are yet unknown. We discuss the present state of effective electron antineutrino mass from β decay experiments; effective Majorana neutrino mass from neutrinoless double‐beta decay experiments; neutrino mass squared differences from neutrino oscillation: solar, atmospheric, reactor, and accelerator‐based experiments; sum of neutrino ...
Jyotsna Singh, M. Ibrahim Mirza, Luca Stanco   +2 more
wiley   +1 more source