Results 111 to 120 of about 1,149,467 (210)

The redshift-space momentum power spectrum – I. Optimal estimation from peculiar velocity surveys

, 2019
Low redshift surveys of galaxy peculiar velocities provide a wealth of cosmological information. We revisit the idea of extracting this information by directly measuring the redshift-space momentum power spectrum from such surveys.
Howlett, Cullan
core   +1 more source

Photo-z Estimation with Normalizing Flow

The Astrophysical Journal
Accurate photometric redshift (photo- z ) estimation is a key challenge in cosmology, as uncertainties in photo- z directly limit the scientific return of large-scale structure and weak lensing studies, especially in upcoming Stage IV surveys.
Yiming Ren, Kwan Chuen Chan, Le Zhang, Yin Li, Haolin Zhang, Ruiyu Song, Yan Gong, Xian-Min Meng, Xingchen Zhou   +8 more
doaj   +1 more source

A Photometric Redshift Catalogue of Galaxies from the DESI Legacy Imaging Surveys DR10

The Astronomical Journal
The large-scale measurement of galaxy redshifts holds significant importance for cosmological research, as well as for understanding the formation and evolution of galaxies. This study utilizes a known sample obtained by cross-correlating the Dark Energy
Changhua Li, Yanxia Zhang, Chenzhou Cui, Shirui Wei, Jingyi Zhang, Yongheng Zhao, Xue-Bing Wu, Yihan Tao, Shanshan Li, Youfen Wang, Zihan Kang   +10 more
doaj   +1 more source

The Intracluster Light Analysis of the Most Evolved Systems of Galaxies: Fossil Groups

The Astrophysical Journal Letters
We present the analysis of the intracluster light (ICL) in three fossil groups, RX J085640.72+055347.36, RX J1136+0713, and RX J1410+4145, at z ∼ 0.1. We used two optical broadband filters, F435W and F606W, observed with the Hubble Space Telescope, and ...
Nícolas O. L. de Oliveira, Yolanda Jiménez-Teja, Renato A. Dupke, Eleazar R. Carrasco, Anton M. Koekemoer, Yuanyuan Su, Jose Manuel Vilchez, Jimmy A. Irwin, Eric D. Miller, Lucas E. Johnson   +9 more
doaj   +1 more source

Galaxy clustering in large redshift surveys [PDF]

, 2002
This thesis analyses the large scale distribution of galaxies in two recently completed redshift surveys and develops models to infer estimates of redshift-space distortions.
Hawkins, Ed
core  

The Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey: 5σ Source Catalog and Redshift Distribution

The Astrophysical Journal
One of the greatest challenges in galaxy evolution over the last decade has been constraining the prevalence of heavily dust-obscured galaxies in the early Universe.
Arianna S. Long, Caitlin M. Casey, Jed McKinney, Jorge A. Zavala, Hollis B. Akins, Olivia R. Cooper, Erini L. Lambrides, Maximilien Franco, Manuel Aravena, Matthieu Bethermin, Karina Caputi, Jaclyn B. Champagne, D. L. Clements, Elisabete da Cunha, Andreas L. Faisst, Fabrizio Gentile, Jacqueline Hodge, Allison W. S. Man, Sinclaire M. Manning, David B. Sanders, Margherita Talia, Ezequiel Treister, Gabriel Brammer, Marcella Brusa, Steven L. Finkelstein, Seiji Fujimoto, Christopher C. Hayward, Olivier Ilbert, Jean-Baptiste Jolly, Jeyhan S. Kartaltepe, Kirsten Knudsen, Anton M. Koekemoer, Daizhong Liu, Georgios Magdis, Henry Joy McCracken, Jason Rhodes, Brant E. Robertson, Nick Scoville, Kartik Sheth, Vernesa Smolcic, Justin Spilker, Yoshiaki Taniguchi, Sune Toft, C. Megan Urry, Min Yun   +44 more
doaj   +1 more source

Enhancing weak lensing redshift distribution characterization by optimizing the Dark Energy Survey Self-Organizing Map Photo-z method

The Open Journal of Astrophysics
Characterization of the redshift distribution of ensembles of galaxies is pivotal for large scale structure cosmological studies. In this work, we focus on improving the Self-Organizing Map (SOM) methodology for photometric redshift estimation (SOMPZ ...
A. Campos, B. Yin, S. Dodelson, A. Amon, A. Alarcon, C. Sánchez, G. M. Bernstein, G. Giannini, J. Myles, S. Samuroff, O. Alves, F. Andrade-Oliveira, K. Bechtol, M. R. Becker, J. Blazek, H. Camacho, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, C. Chang, R. Chen, A. Choi, J. Cordero, C. Davis, J. DeRose, H. T. Diehl, C. Doux, A. Drlica-Wagner, K. Eckert, T. F. Eifler, J. Elvin-Poole, S. Everett, X. Fang, A. Ferté, O. Friedrich, M. Gatti, D. Gruen, R. A. Gruendl, I. Harrison, W. G. Hartley, K. Herner, H. Huang, E. M. Huff, M. Jarvis, E. Krause, N. Kuropatkin, P. -F. Leget, N. MacCrann, J. McCullough, A. Navarro-Alsina, S. Pandey, J. Prat, M. Raveri, R. P. Rollins, A. Roodman, R. Rosenfeld, A. J. Ross, E. S. Rykoff, J. Sanchez, L. F. Secco, I. Sevilla-Noarbe, E. Sheldon, T. Shin, M. A. Troxel, I. Tutusaus, T. N. Varga, R. H. Wechsler, B. Yanny, Y. Zhang, J. Zuntz, M. Aguena, J. Annis, D. Bacon, S. Bocquet, D. Brooks, D. L. Burke, J. Carretero, F. J. Castander, M. Costanzi, L. N. da Costa, J. De Vicente, P. Doel, I. Ferrero, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, M. Lima, H. Lin, J. L. Marshall, J. Mena-Fernández, F. Menanteau, R. Miquel, R. L. C. Ogando, M. Paterno, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, A. Porredon, E. Sanchez, D. Sanchez Cid, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, V. Vikram, N. Weaverdyck   +113 more
doaj   +1 more source

Spatially Resolved Modeling of Galactic Hα Emission for Galaxy Clustering

The Astrophysical Journal
Near-infrared spectroscopic surveys target high-redshift emission-line galaxies (ELGs) to probe cosmological scenarios. Understanding the clustering properties of ELGs is essential to derive optimal constraints.
Ivan Rapoport, Vincent Desjacques, Gabriele Parimbelli, Ehud Behar, Martin Crocce   +4 more
doaj   +1 more source

Optimising the sample selection for photometric galaxy surveys

Astronomy & Astrophysics
Context. Determining cosmological parameters with high precision, as well as resolving current tensions in their values derived from low- and high-redshift probes, is one of the main objectives of the new generation of cosmological surveys.
Alemany-Gotor M., Tutusaus I., Fosalba P.   +2 more
doaj   +1 more source

PROBING COSMIC ACCELERATION WITH GALAXY REDSHIFT SURVEYS

, 2011
Redshift surveys of galaxies beyond the local Universe (z ≫ 0.1) are opening up new possibilities to understanding the observed acceleration of cosmic expansion, one of the greatest mysteries of modern science.
LUIGI GUZZO
core   +1 more source