NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T07:24:25 PDT
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For refcode 2017ApJS..232...21K:
Retrieve 236 NED objects in this reference.
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2017ApJS..232...21K Stellar Photometric Structures of the Host Galaxies of Nearby Type 1 Active Galactic Nuclei Kim, Minjin; Ho, Luis C.; Peng, Chien Y.; Barth, Aaron J.; Im, Myungshin Abstract. We present detailed image analysis of rest-frame optical images of 235 low-redshift (z <~ 0.35) Type 1 active galactic nuclei (AGNs) observed with the Hubble Space Telescope. The high-resolution images enable us to perform rigorous two-dimensional image modeling to decouple the luminous central point source from the host galaxy, which, when warranted, is further decomposed into its principal structural components (bulge, bar, and disk). In many cases, care must be taken to account for structural complexities such as spiral arms, tidal features, and overlapping or interacting companion galaxies. We employ Fourier modes to characterize the degree of asymmetry of the light distribution of the stars as a quantitative measure of morphological distortion due to interactions or mergers. We examine the dependence of the physical parameters of the host galaxies on the properties of the AGNs, namely, radio-loudness and the width of the broad emission lines. In accordance with previous studies, narrow-line (Hbeta FWHM <= 2000 km s^-1^) Type 1 AGNs, in contrast to their broad-line (Hbeta FWHM > 2000 km s^-1^) counterparts, are preferentially hosted in later-type, lower-luminosity galaxies, which have a higher incidence of pseudo-bulges, are more frequently barred, and are less morphologically disturbed. This suggests that narrow-line Type 1 AGNs experienced a more quiescent evolutionary history driven primarily by internal secular evolution instead of external dynamical perturbations. The fraction of AGN hosts showing merger signatures is larger for more luminous sources. Radio-loud AGNs generally preferentially live in earlier-type (bulge-dominated), more massive hosts, although a minority of them appear to contain a significant disk component. We do not find convincing evidence for enhanced merger signatures in the radio-loud population. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Data Archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., under NASA contract NAS5-26555. These data are associated with program AR-12133 and AR-12818. Key words: galaxies: active, galaxies: bulges, galaxies: fundamental parameters, galaxies: photometry, quasars: general
Retrieve 236 NED objects in this reference.
Please click here for ADS abstract

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