Results 221 to 230 of about 94,086 (264)

DESI 2024 III: baryon acoustic oscillations from galaxies and quasars

Journal of Cosmology and Astroparticle Physics
We present the DESI 2024 galaxy and quasar baryon acoustic oscillations (BAO) measurements using over 5.7 million unique galaxy and quasar redshifts in the range 0.1 < z < 2.1.
A. G. Adame, J. Aguilar, S. Ahlen, S. Alam, D. Alexander, M. Alvarez, O. Alves, A. Anand, U. Andrade, É. Armengaud, S. Ávila, A. Aviles, H. Awan, S. Bailey, C. Baltay, A. Bault, J. Behera, S. Benzvi, F. Beutler, D. Bianchi, C. Blake, R. Blum, S. Brieden, A. Brodzeller, D. Brooks, E. Buckley-Geer, E. Burtin, R. Calderon, R. Canning, A. Carnero Rosell, R. Cereskaite, J. Cervantes-Cota, S. Chabanier, E. Chaussidon, J. Chaves-Montero, S. Chen, X. Chen, T. Claybaugh, S. Cole, A. Cuceu, T. Davis, K. Dawson, A. de la Macorra, A. de Mattia, N. Deiosso, A. Dey, B. Dey, Z. Ding, P. Doel, J. Edelstein, S. Eftekharzadeh, D. Eisenstein, A. Elliott, P. Fagrelius, K. Fanning, S. Ferraro, J. Ereza, N. Findlay, B. Flaugher, A. Font-Ribera, D. Forero-Sánchez, J. Forero-Romero, C. Garcia-Quintero, E. Gaztañaga, H. Gil-Marín, S. Gontcho, A. Gonzalez-Morales, V. Gonzalez-Perez, C. Gordon, D. Green, D. Gruen, R. Gsponer, G. Gutiérrez, J. Guy, B. Hadzhiyska, C. Hahn, M. Hanif, H. Herrera-Alcantar, K. Honscheid, C. Howlett, D. Huterer, V. Iršič, M. Ishak, S. Juneau, N. G. Karaçaylı, R. Kehoe, S. Kent, D. Kirkby, H. Kong, A. Kremin, A. Krolewski, Y. Lai, T. Lan, M. Landriau, D. Lang, J. Lasker, J. Le Goff, L. Le Guillou, A. Leauthaud, M. Levi, T.S. Li, E. Linder, K. Lodha, C. Magneville, M. Manera, D. Margala, P. Martini, M. Maus, P. McDonald, L. Medina-Varela, A. Meisner, J. Mena-Fernández, R. Miquel, J. Moon, S. Moore, J. Moustakas, E. Mueller, A. Muñoz-Gutiérrez, A. Myers, S. Nadathur, L. Napolitano, R. Neveux, J. Newman, N. Nguyen, J. Nie, G. Niz, H. Noriega, N. Padmanabhan, E. Paillas, N. Palanque-Delabrouille, J. Pan, S. Penmetsa, W. Percival, M. Pieri, M. Pinon, C. Poppett, A. Porredon, F. Prada, A. P'erez-Fern'andez, I. Pérez-Ràfols, D. Rabinowitz, A. Raichoor, C. Ram'irez-P'erez, S. Ramirez-Solano, M. Rashkovetskyi, C. Ravoux, M. Rezaie, J. Rich, A. Rocher, C. Rockosi, N. Roe, A. Rosado-Marín, A. Ross, G. Rossi, R. Ruggeri, V. Ruhlmann-Kleider, L. Samushia, E. Sanchez, C. Saulder, E. Schlafly, D. Schlegel, M. Schubnell, H. Seo, R. Sharples, J. Silber, A. Slosar, A. Smith, D. Sprayberry, J. Swanson, T. Tan, G. Tarlé, S. Trusov, R. Vaisakh, D. Valcin, F. Valdes, M. Vargas-Magaña, L. Verde, M. Walther, B. Wang, M.S. Wang, B. Weaver, N. Weaverdyck, R. H. Wechsler, D. Weinberg, M. White, M. Wilson, J. Yu, Y. Yu, S. Yuan, C. Yèche, E. Zaborowski, P. Zarrouk, H. Zhang, C. Zhao, R. Zhao, R. Zhou, H. Zou   +196 more
semanticscholar   +1 more source

QUASAR

Proceedings of the 33rd Annual Computer Security Applications Conference, 2017
Computer security has long been an arms race between attacks and defenses. While new defenses are proposed and built to stop specific vectors of attacks, novel, sophisticated attacks are devised by attackers to bypass them. This rapid cycle of defenses and attacks has made it difficult to strategically reason about the protection offered by each ...
Richard Skowyra, Steven R. Gomez, David Bigelow, James Landry, Hamed Okhravi   +4 more
openaire   +1 more source

Cosmological constraints from the Hubble diagram of quasars at high redshifts

Nature Astronomy, 2018
The concordance model (Λ cold dark matter (ΛCDM) model, where Λ is the cosmological constant) reproduces the main current cosmological observations1–4 assuming the validity of general relativity at all scales and epochs and the presence of CDM and of Λ ...
G. Risaliti, E. Lusso
semanticscholar   +1 more source

Quasar Boundary

Science, 1982
The observed absence of quasar redshifts larger than 3.53 is erroneously attributed to Richard Green and myself in "A boundary for the quasars" (Research News, 22 Jan., p. 388). Our survey of bright quasars does not cover redshifts larger than 2.2 because in choosing candidates we rely on the ultraviolet excess, which tends to disappear at larger ...
openaire   +3 more sources

Oscillations of Quasars

Science, 1964
Rotation in addition to free gravitational motion can produce oscillations in a large spherical mass of gas. The theory may provide an explanation of the variations of brightness in such objects as 3C273.
openaire   +2 more sources

Quasars and the Intergalactic Medium at Cosmic Dawn

Annual Review of Astronomy and Astrophysics, 2023
Eduardo Banados
exaly  

A dusty compact object bridging galaxies and quasars at cosmic dawn

Nature, 2022
Seiji Fujimoto, Gabriel B Brammer, Darach J Watson   +2 more
exaly  

Quasars

2003
B.M. Peterson, S. Mathur, P.S. Osmer, M. Vestergaard   +3 more
openaire   +1 more source

Quasars

2021
openaire   +1 more source

The diversity of quasars unified by accretion and orientation

Nature, 2014
Yue Shen, Luis C Ho
exaly