Results 61 to 70 of about 765,605 (153)

The relationship between Gas and Galaxies [PDF]

, 2009
We have investigated the 2D 2-point correlation function, ƐAG, between low column density Lya absorbers and galaxies at a redshift z ~ 1 for the first time.
Shone, Allen Maurice
core  

Kinematics of Circumgalactic O vi Gas and Disk Rotation of z ≈ 0.2 Star-forming Galaxies

The Astrophysical Journal
Quasar sightline observations reveal that low ionization state gas corotates with the galaxy disk and often at subcentrifugal velocities, suggesting that the gas is spiraling toward the galaxy disk.
Stephanie H. Ho, Crystal L. Martin, Hasti Nateghi, Glenn G. Kacprzak, Jonathan Stern   +4 more
doaj   +1 more source

A Quasar Pair Sample Compiled from DESI Data Release 1

The Astrophysical Journal
Interacting quasar pairs (QPs; either dual or binary) provide crucial insights into galaxy mergers, black hole growth, and large-scale structure formation.
Liang Jing, Qihang Chen, Xingyu Zhu, Zhuojun Deng, Hu Zou, Jun-Qing Xia, Jianghua Wu   +6 more
doaj   +1 more source

Radio structures in QSO-galaxy pairs [PDF]

, 1990
It is now generally agreed that if quasars and nearby low redshift galaxies are associated, then there should be luminous connections between them.
Akujor, Chidi E.
core  

Quasar induced galaxy formation: a new paradigm? [PDF]

, 2009
peer reviewedAims: We discuss observational evidence that quasars play a key role in the formation of galaxies, starting from the detailed study of the quasar HE0450-2958 and extending the discussion to a series of converging evidence that radio jets may
G. Letawe, Jahnke, K., Letawe, G., Letawe, Géraldine, K. Jahnke, E. Pantin, Le Borgne, D., Jahnke, Knud, D. Elbaz, Elbaz, D., Leborgne, Damien, Pantin, eric, D. Le Borgne, Elbaz, David, Pantin, E.   +14 more
core   +1 more source

Cosmic Chance Superpositions: Largest Catalog of Quasar-Galaxy Pairs at a Projected Separation of $D \lesssim 20$ kpc

Submitted in ApJ.
Guha, Labanya Kumar, Srianand, Raghunathan, Dutta, Rajeshwari   +2 more
openaire   +2 more sources

Testing the paradigm: First spectroscopic evidence of a quasar-galaxy Mpc-scale association at cosmic dawn [PDF]

, 2019
State-of-the-art models of massive black hole formation postulate that quasars at z > 6 reside in extreme peaks of the cosmic density structure in the early universe. Even so, direct observational evidence of these overdensities is elusive, especially
Balmaverde Barbara, Nanni Riccardo, Cappelluti Nico, Mignoli Marco, Peca Alessandro, Decarli Roberto, Comastri Andrea, Brusa Marcella, Vignali Cristian, Gilli Roberto, Pensabene Antonio, Vanzella Eros, CAPPELLUTI, Nico, VANZELLA, Eros, GILLI, Roberto, PENSABENE, ANTONIO, BALMAVERDE, Barbara, Alessandro Peca, Cristian Vignali, Marcella Brusa, Roberto Gilli, Eros Vanzella, Riccardo Nanni, DECARLI, ROBERTO, Nico Cappelluti, Antonio Pensabene, MIGNOLI, Marco, VIGNALI, CRISTIAN, Marco Mignoli, COMASTRI, Andrea, PECA, ALESSANDRO, Barbara Balmaverde, Brusa, Marcella, Andrea Comastri, NANNI, RICCARDO, Roberto Decarli   +35 more
core   +1 more source

Quasar-galaxy associations revisited [PDF]

, 2000
9 pages, 6 figures.-- MNRAS accepted.Gravitational lensing predicts an enhancement of the density of bright, distant QSOs around foreground galaxies. We measure this QSO-galaxy correlation w_qg for two complete samples of radio-loud quasars, the southern
Martínez-González, Enrique, Sanz, J. L., Benítez, Narciso   +2 more
core  

Exploring the Mpc Environment of the Quasar ULAS J1342+0928 at z = 7.54

The Astrophysical Journal
Theoretical models predict that z ≳ 6 quasars are hosted in the most massive halos of the underlying dark matter distribution and thus would be immersed in protoclusters of galaxies. However, observations report inconclusive results. We investigate the 1.
Sofía Rojas-Ruiz, Chiara Mazzucchelli, Steven L. Finkelstein, Eduardo Bañados, Emanuele Paolo Farina, Bram P. Venemans, Roberto Decarli, Chris J. Willott, Feige Wang, Fabian Walter, Enrico Congiu, Gabriel Brammer, Peter Zeidler   +12 more
doaj   +1 more source

Clustering and redshift-space distortions in QSO and galaxy surveys [PDF]

, 2006
In this thesis, we exploit the potential of existing QSO and galaxy surveys for investigating the nature of the large scale structure in the Universe. A detailed analysis of clustering and redshift- space distortions allows us to constrain cosmological ...
Cruz da Angela, José Antonio, José Antonio Cruz da Angela   +1 more
core