Results 61 to 70 of about 31,213 (262)
Chemical Evolution of the Universe and its Consequences for Gravitational‐Wave Astrophysics
Annalen der Physik, Volume 536, Issue 2, February 2024.Population properties of double compact object mergers (especially binary black holes) are sensitive to the metallicity dependent cosmic star formation history. The uncertainty of this quantity cannot be ignored and makes the interpretation of current gravitational wave observations difficult.
Martyna Chruślińska
wiley +1 more source
The Accuracy of Morphological Decomposition of Active Galactic Nucleus Host Galaxies
, 2008 In order to assess the accuracy with which we can determine the morphologies of AGN host galaxies, we have simulated more than 50,000 ACS images of galaxies with z < 1.25, using image and noise properties appropriate for the GOODS survey.
B. D. Simmons +3 more
core +1 more source
The dust masses of powerful radio galaxies: clues to the triggering of their activity [PDF]
, 2014 We use deep Herschel Space Observatory observations of a 90% complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 < z < 0.7) to estimate the dust masses of their host galaxies and thereby investigate the triggering mechanisms for their ...
Almeida, C. +7 more
core +3 more sources
Galaxies Lighting Up: Discovery of Seventy New Turn-on Changing-look Active Galactic Nuclei
The Astrophysical Journal“Changing-look active galactic nuclei” (CL AGN) show dramatic, rapid changes in optical/UV continuum and broad-line emission. The majority of CL AGN have been found dimming as “turn-off” CL AGN because most selection methods start from samples of ...
Qian Yang +5 more
doaj +1 more source
$z\sim2$ dual AGN host galaxies are disky: stellar kinematics in the ASTRID Simulation
The Open Journal of AstrophysicsWe study dual AGN host galaxy morphologies at $z=2$ using the ASTRID simulation, selecting black hole (BH) pairs with small separation ($\Delta r10^7M_\odot$), and luminosity ($L_{\text{bol,12}}>10^{43}\rm{erg/s}$).
Ekaterine Dadiani +8 more
doaj +1 more source
Pair-Matching of Radio-Loud and Radio-Quiet AGNs
Frontiers in Astronomy and Space Sciences, 2017 Active galactic nuclei (AGNs) are known to cover an extremely broad range of radio luminosities and the spread of their radio-loudness is very large at any value of the Eddington ratio.
Dorota Kozieł-Wierzbowska +5 more
doaj +1 more source
Structure and morphology of X-ray selected AGN hosts at 1
, 2014 We analyze morphologies of the host galaxies of 35 X-ray selected active galactic nucleus (AGNs) at $z\sim2$ in the Cosmic Evolution Survey (COSMOS) field using Hubble Space Telescope/WFC3 imaging taken from the Cosmic Assembly Near-infrared Deep ...
Chen, Yang +6 more
core +2 more sources
The Astrophysical JournalWe investigate the stellar shape and size–mass relationship of X-ray-selected active galactic nucleus (AGN) host galaxies using the high angular resolution and deep sensitivity in the near-infrared of the COSMOS-Web JWST survey field. We present the rest-
Bovornpratch Vijarnwannaluk +21 more
doaj +1 more source
Morphologies of Radio, X-Ray, and Mid-Infrared Selected AGN
, 2010 We investigate the optical morphologies of candidate active galaxies identified at radio, X-ray, and mid-infrared wavelengths. We use the Advanced Camera for Surveys General Catalog (ACS-GC) to identify 372, 1360, and 1238 AGN host galaxies from the VLA,
Alonso-Herrero +46 more
core +1 more source
The black holes of radio galaxies during the "Quasar Era": Masses, accretion rates, and evolutionary stage [PDF]
, 2010 We present an analysis of the AGN broad-line regions of 6 powerful radio galaxies at z>~2 (HzRGs) with rest-frame optical imaging spectroscopy obtained at the VLT. All galaxies have luminous (L(H-alpha)=few x 10^44 erg s^-1), spatially unresolved H-alpha
Best, Philip N. +5 more
core +1 more source