Results 81 to 90 of about 1,391,040 (211)

A Multiwavelength Study of ELAN Environments (AMUSE2): The Impact of Dense Environment on Massive Dusty Star-forming Galaxies at Cosmic Noon

The Astrophysical Journal
To understand how massive galaxies are influenced by their surroundings, we present new Atacama Large Millimeter/submillimeter Array and Northern Extended Millimeter Array observations as part of A Multiwavelength Study of Enormous Ly α Nebula (ELAN ...
Yu-Jan Wang, Chian-Chou Chen, Fabrizio Arrigoni Battaia, Roberto Decarli, Helmut Dannerbauer, Po-Feng Wu   +5 more
doaj   +1 more source

VizieR Online Data Catalog: SDSS DR10 catalogue of candidate quasars

, 2015
We discuss whether modern machine learning methods can be used to characterize the physical nature of the large number of objects sampled by the modern multi-band digital surveys.
Cavuoti S., Longo G., Brescia M.
core  

THE EVOLUTION OF THE DUSTY TORUS COVERING FACTOR IN QUASARS

, 2013
We have assembled a large sample of 5996 quasars at 2.0
Gu, Minfeng
core  

Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. I. The Hβ Broad-line Region Structure and Black Hole Masses of Five Quasars

The Astrophysical Journal
We conduct a reverberation mapping (RM) campaign to spectroscopically monitor a sample of selected bright active galactic nuclei with large anticipated broad-line region (BLR) sizes adequate for spectroastrometric (SA) observations by the GRAVITY ...
Yan-Rong Li, Chen Hu, Zhu-Heng Yao, Yong-Jie Chen, Hua-Rui Bai, Sen Yang, Pu Du, Feng-Na Fang, Yi-Xin Fu, Jun-Rong Liu, Yue-Chang Peng, Yu-Yang Songsheng, Yi-Lin Wang, Ming Xiao, Shuo Zhai, Hartmut Winkler, Jin-Ming Bai, Luis C. Ho, Romain G. Petrov, Jesús Aceituno, Jian-Min Wang, SARM Collaboration   +21 more
doaj   +1 more source

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source

A range of time delays for the double quasar 0957 + 561 A, B

The Astrophysical Journal, 1980
We have extended the complex formalism of Bourassa and Kantowski for a transparent gravitational lens to a multilens situation. By using a grid of assumed positions for the cluster center within its measured error box, we have then calculated a range of possible time delays between the two images, A and B. The results indicate a range from 0.03 yr to 1.
C. C. Dyer, R. C. Roeder
openaire   +1 more source

The metallicity of the most distant quasars ⃰

, 2009
We investigate the metallicity of the broad line region (BLR) of a sample of 30 quasars in the redshift range 4 6 quasars. The latter result is puzzling, since the minimum enrichment timescale of carbón is about 1 Gyr, i.e.
RAUL MUJICA GARCIA
core  

Varstrometry for Dual Active Galactic Nuclei Using Radio Interferometry: VaDAR with the VLBA

The Astrophysical Journal
Multiple active galactic nuclei (multi-AGN) are a known result of galaxy mergers. Therefore, they are an important tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. A novel method for the selection of multi-
Emma Schwartzman, Paula Fudolig, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg   +8 more
doaj   +1 more source

Quasars in the Cosmic Environment

, 2012
We now consider the environment of quasars in the widest possible sense, from the circumnuclear regions to very large scales of hundreds of kiloparsecs.
Marziani Paola, Martin Elvis, Shlosman, Isaac, Elvis Martin, Fan Xiaoui, Cavaliere, Alfonso, Hawkins, Mike, Sulentic Jack W., Mike Hawkins, Dultzin, Deborah, Greg Shields, Falomo Renato, Knapen, Johan, Ross McLure, Proga, Daniel, Paola Marziani, Deborah Dultzin, D'ONOFRIO, MAURO, Daniel Proga, Richards Gordon, Johan Knapen, Proga Daniel, Cavaliere Alfonso, Franceschini Alberto, Dultzin Deborah, McLure Ross, Alfonso Cavaliere, Shields, Greg, Richards, Gordon, McLure, Ross, Gordon Richards, Jack W. Sulentic, Hagai Netzer, Xiaoui Fan, Mauro D’Onofrio, Netzer Hagai, Alberto Franceschini, Marziani, Paola, Netzer, Hagai, Fan, Xiaoui, Sulentic, Jack W., Franceschini, Alberto, Isaac Shlosman, Shlosman Isaac, Morganti, Raffaella, Renato Falomo, Knapen Johan, Shields Greg, Falomo, Renato, Raffaella Morganti, Hawkins Mike, Elvis, Martin   +51 more
core   +1 more source

Widespread Detection of Aromatic and Aliphatic Emission in the Dual Quasar J0749+2255 at Cosmic Noon

The Astrophysical Journal Letters
Based on the integral field observations made with the Mid Infrared Instrument on board the James Webb Space Telescope (JWST), we report a widespread detection of aromatic and aliphatic hydrocarbon emission at rest-frame 3.3 and 3.4 μ m in SDSS J074922 ...
C. E. Mentzer, Aigen Li, X. J. Yang
doaj   +1 more source