Results 141 to 150 of about 85,255 (272)

The radio loud narrow-line quasar SDSSJ172206.03+565451.6

, 2005
S. Komossa, W. Voges, H. M. Adorf, Dawei Xu, Smita Mathur, Scott F. Anderson   +5 more
openalex   +1 more source

Powerful Nuclear Outflows and Circumgalactic Medium Shocks Driven by the Most Luminous Known Obscured Quasar in the Universe

The Astrophysical Journal
We report integral field spectroscopy observations with the Near-Infrared Spectrograph on board the James Webb Space Telescope, targeting the 60 kpc environment surrounding the most luminous obscured quasar known at z = 4.6.
Andrey Vayner, Tanio Díaz-Santos, Peter R. M. Eisenhardt, Daniel Stern, Lee Armus, Daniel Anglés-Alcázar, Roberto J. Assef, Román Fernández Aranda, Andrew W. Blain, Hyunsung D. Jun, Chao-Wei Tsai, Niranjan Chandra Roy, Drew Brisbin, Carl D. Ferkinhoff, Manuel Aravena, Jorge González-López, Guodong Li, Mai Liao, Devika Shobhana, Jingwen Wu, Dejene Zewdie   +20 more
doaj   +1 more source

Galaxy and Mass Assembly (GAMA). The Properties of Quasar Host Galaxies: Star Formation Histories and Stellar Populations

The Astrophysical Journal
We investigated the star formation history and stellar populations of a sample of 205 Type I quasar host galaxies (0.1 < z < 0.35) and compared them with normal (nonactive) galaxies of the same mass and redshift within the volume of the Galaxy and Mass ...
Maria B. Stone, Roberto De Propris, Clare Wethers, Jari Kotilainen, Nischal Acharya, Benne Holwerda, Andrew M. Hopkins, Kevin Pimbblet   +7 more
doaj   +1 more source

Large-scale surveys of the quasar proximity effect

The Open Journal of Astrophysics
The UV radiation from high redshift quasars causes a local deficit in the neutral hydrogen absorption (Lyman-alpha forest) in their spectra, known as the proximity effect.
Rupert Croft, Patrick Shaw, Ann-Marsha Alexis, Nianyi Chen, Yihao Zhou, Tiziana Di Matteo, Simeon Bird, Patrick Lachance, Yueying Ni   +8 more
doaj   +1 more source

Measuring the scale of cosmic homogeneity with SDSS-IV DR14 quasars [PDF]

, 2018
Rodrigo S. Gonçalves, G C Carvalho, Carlos A. P. Bengaly, J. Carvalho, J. S. Alcaniz   +4 more
openalex   +1 more source

On the limits to past variability of the proton-electron mass ratio set by quasar absorption line redshifts [PDF]

, 1977
B. E. J. Pagel
openalex   +1 more source

The soft x-ray properties of a complete sample of optically selected quasars. 1: First results

, 1994
Ari Laor, F. Fiore, M. Elvis, B. J. Wilkes, Jonathan McDowell   +4 more
openalex   +2 more sources

Astro2020 Science White Paper: A New Era for X-ray Lensing Studies of Quasars and Galaxies [PDF]

, 2019
G. Chartas, H. Krawczynski, D. Pooley, R. F. Mushotzky, Andrew J. Ptak   +4 more
openalex   +1 more source

A panchromatic view of infrared quasars: excess star formation and radio emission in the most heavily obscured systems [PDF]

, 2022
Carolina Andonie, Alexander, David M., D. J. Rosario, Brivael Laloux, A. Georgakakis, L. K. Morabito, C. Villforth, Mathilda Avirett‐Mackenzie, G. Calistro Rivera, A. Del Moro, S. Fotopoulou, C. M. Harrison, Andrea Lapi, Petley, James, Grayson C. Petter, Francesco Shankar   +15 more
openalex   +1 more source

An Energetics of Quasar [PDF]

Progress of Theoretical Physics, 1965
openaire   +1 more source