Results 91 to 100 of about 159,044 (227)
The host galaxy properties of variability selected AGN in the Pan-STARRS1 Medium-Deep Survey [PDF]
, 2016 We study the properties of 975 active galactic nuclei (AGN) selected by variability in the Pan-STARRS1 Medium-Deep Survey. Using complementary multi wavelength data from the ultraviolet to the far-infrared, we use SED fitting to determine the AGN and host properties at $z<1$, and compare to a well-matched control sample. We confirm the trend previously
arxiv +1 more source
Star formation characteristics of galaxies hosting AGN
, 2023 We present an analysis of the ultra-violet (UV) observations of two Seyfert type active galactic nuclei (AGN), namely NGC$~$4051 and NGC$~$4151. These observations aimed at studying the star formation in the hosts of these AGN were carried out with the ultra-violet imaging telescope on board AstroSat in far-UV.
Nandi, Payel, Stalin, C. S.
openaire +2 more sources
The Host Galaxies Of Agn With Powerful Relativistic Jets
, 2016 We present deep Near-infrared (NIR) images of a sample of 19 intermediate-redshift (0.3<z<1.0) radio-loud active galactic nuclei (AGN) with powerful relativistic jets (L1.4GHz >10^27 WHz^-1), previously classified as flat-spectrum radio quasars. We also compile host galaxy and nuclear magnitudes for blazars from literature.
J. Leon-Tavares +8 more
openaire +4 more sources
The Astrophysical JournalRecent JWST observations have uncovered an unexpectedly large population of massive quiescent galaxies at z > 3. Using the cosmological simulations IllustrisTNG and ASTRID , we identify analogous galaxies and investigate their abundance, formation ...
Emma Jane Weller +4 more
doaj +1 more source
On the Effects of Local Environment on Active Galactic Nucleus (AGN) in the Horizon Run 5 Simulation
The Astrophysical Journal, 2023 We use the Horizon Run 5 cosmological simulation to study the effect of galaxy intrinsic properties and the local environment on active galactic nuclei (AGNs) characterized by their threshold of the accretion rate.
Ankit Singh +8 more
doaj +1 more source
Tracing the evolution of Active Galactic Nuclei host galaxies over the last 9 Gyrs of Cosmic time [PDF]
, 2013 We present the results of a combined galaxy population analysis for the host galaxies of active galactic nuclei (AGN) identified at 0 < z < 1.4 within the SDSS, Bootes and DEEP2 surveys. We identified AGN in a uniform and unbiased manner at X-ray, infrared and radio wavelengths.
arxiv +1 more source
The Astrophysical JournalThe first public 0.9–4.4 μ m NIRCam images of the North Ecliptic Pole Time Domain Field uncovered galaxies displaying point-source features in their cores as seen in the longer-wavelength filters. We visually identified a sample of 66 galaxies (∼1 galaxy
Rafael Ortiz III +38 more
doaj +1 more source
The AGN/Normal Galaxy Connection : Summary [PDF]
, 1999 The connection between normal and active galaxies is reviewed, by summarizing our progress on answering nine key questions. (1) Do all galaxies contain massive dark objects (MDOs)? (2) Are these MDOs actually supermassive black holes? (3) Why are the dark objects so dark? (4) Do all galaxies contain an Active Galactic Nucleus (AGN)?
arxiv +1 more source
The Astrophysical JournalWe present a detailed imaging analysis of 260 ks of subarcsecond resolution Chandra (ACIS-S) observations of the nearby Seyfert 2 galaxy NGC 5728. Our study focuses on the bright and diffuse soft X-ray emission within the galaxy's inner ∼1 kpc.
Anna Trindade Falcão +4 more
doaj +1 more source
Recent Results from the SAFIR Project
Acta Polytechnica CTU Proceedings, 2014 The "Seyfert and star formation Activity in the Far-Infrared" (SAFIR) project is aimed at studying the physical nature of the nuclear IR emission and star formation properties of a small sample of nearby Seyfert galaxies observed with the PACS and SPIRE ...
M. Sánchez-Portal +18 more
doaj +1 more source