Results 41 to 50 of about 159,044 (227)

A Multi-wavelength Survey of AGN in Massive Clusters: AGN Distribution and Host Galaxy Properties [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society 2014 442 (4): 314-326, 2014
We investigate the effect of environment on the presence and fuelling of Active Galactic Nuclei (AGN) by identifying galaxies hosting AGN in massive galaxy clusters and the fields around them. We have identified AGN candidates via optical variability (178), X-ray emission (74), and mid-IR SEDs (64) in multi- wavelength surveys covering regions centered
arxiv   +1 more source

Mid-infrared Outbursts in Nearby Galaxies: Nuclear Obscuration and Connections to Hidden Tidal Disruption Events and Changing-look Active Galactic Nuclei

open access: yesThe Astrophysical Journal Letters, 2023
We study the properties of galaxies hosting mid-infrared outbursts in the context of a catalog of 500,000 galaxies from the Sloan Digital Sky Survey. We find that nuclear obscuration, as inferred by the surrounding dust mass, does not correlate with host
Sierra A. Dodd   +7 more
doaj   +1 more source

Environmental dependence of AGN activity. I.: the effects of host galaxy [PDF]

open access: yesAstrophys.J.699:1679-1689,2009, 2009
Using a large sample of local galaxies (144,940) with -17.5< Mr <-22 and 0.025< z <0.107, selected from SDSS DR5, we compare AGN host galaxies with non-AGN galaxies at matched luminosity, velocity dispersion, color, color gradient, or concentration index, to investigate how AGN activity is related with galaxy properties.
arxiv   +1 more source

AGN and Host Galaxies in the COSMOS Survey [PDF]

open access: yesProceedings of the International Astronomical Union, 2010
AbstractThe Cosmological Evolution Survey (COSMOS) is a unique tool for studying low level AGN activity and the co-evolution of galaxies and supermassive black holes. COSMOS involves the largest contiguous region of the sky ever imaged by HST; it includes very complete multiwavelength coverage, and the largest joint samples of galaxy and AGN redshifts ...
Jonathan R. Trump   +2 more
openaire   +2 more sources

The clustering of X-ray AGN at 0.5 < z < 4.5: host galaxies dictate dark matter halo mass [PDF]

open access: yes, 2020
We present evidence that AGN do not reside in ``special'' environments, but instead show large-scale clustering determined by the properties of their host galaxies. Our study is based on an angular cross-correlation analysis applied to X-ray selected AGN in the COSMOS and UDS fields, spanning redshifts from $z\sim4.5$ to $z\sim0.5$.
arxiv   +1 more source

AGN Absorption Linked to Host Galaxies [PDF]

open access: yesProceedings of the International Astronomical Union, 2013
AbstractMultiwavelength identification of AGN is crucial not only to obtain a more complete census, but also to learn about the physical state of the nuclear activity (obscuration, efficiency, etc.). A panchromatic strategy plays an especially important role when the host galaxies are star-forming.
openaire   +3 more sources

Establishing the impact of powerful AGN on their host galaxies [PDF]

open access: yesProceedings of the International Astronomical Union, 2019
AbstractEstablishing the role of active galactic nuclei (AGN) during the formation of galaxies remains one of the greatest challenges of galaxy formation theory. Towards addressing this, we summarise our recent work investigating: (1) the physical drivers of ionised outflows and (2) observational signatures of the impact by jets/outflows on star ...
C. M. Harrison   +3 more
openaire   +3 more sources

CEERS Key Paper. II. A First Look at the Resolved Host Properties of AGN at 3 < z < 5 with JWST

open access: yesThe Astrophysical Journal Letters, 2023
We report on the host properties of five X-ray-luminous active galactic nuclei (AGN) identified at 3 < z < 5 in the first epoch of imaging from the Cosmic Evolution Early Release Science Survey.
Dale D. Kocevski   +59 more
doaj   +1 more source

The environment of AGN dwarf galaxies at z$\sim$0.7 from the VIPERS survey [PDF]

open access: yes, 2022
Dwarf galaxies are ideal laboratories to study the relationship between the environment and AGN activity. However, the type of environments in which dwarf galaxies hosting AGN reside is still unclear and limited to low-redshift studies (z < 0.5). We use the VIMOS Public Extragalactic Redshift Survey (VIPERS) to investigate, for the first time, their ...
arxiv   +1 more source

CEERS Key Paper. VII. JWST/MIRI Reveals a Faint Population of Galaxies at Cosmic Noon Unseen by Spitzer

open access: yesThe Astrophysical Journal Letters, 2023
The Cosmic Evolution Early Release Science program observed the Extended Groth Strip (EGS) with the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope (JWST) in 2022.
Allison Kirkpatrick   +35 more
doaj   +1 more source

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