Results 11 to 20 of about 161,008 (274)
Morphology of Seyfert Galaxies [PDF]
Astronomy Reports, 2017 We probed the relation between properties of Seyfert nuclei and morphology of their host galaxies. We selected Seyfert galaxies from the Sloan Digital Sky Survey with redshifts less 0.2 identified by the V ron Catalog (13th). We used the "{\it{FracDev}}" parameter from SDSS galaxy fitting models to represent the bulge fractions of the Seyfert host ...
Yen Chen Chen, Chorng Yuan Hwang
openaire +5 more sources
Seyfert Galaxies Astrophysics [PDF]
Universe, 2020 Looking back in time, it is somehow surprising to see the enormous advancement made by astrophysics in just about one century [...]
Luigi Foschini
doaj +2 more sources
The Seyfert Population in the Local Universe [PDF]
Astron.J.126:1750,2003, 2003 The magnitude-limited catalog of the Southern Sky Redshift Survey (SSRS2), is used to characterize the properties of galaxies hosting Active Galactic Nuclei.
Christopher N. A. Willmer +13 more
core +2 more sources
The Close Environment of Seyfert Galaxies and Its Implication for Unification Models [PDF]
, 1999 This paper presents a statistical analysis of the circumgalactic environment of nearby Seyfert galaxies based on a computer-aided search of companion galaxies on the Digitized Sky Survey (DSS). An intrinsic difference between the environment of Seyfert 1
D. Dultzin-Hacyan +15 more
core +4 more sources
Classifying Seyfert Galaxies with Deep Learning [PDF]
The Astrophysical Journal Supplement Series, 2021 Abstract The traditional classification for a subclass of the Seyfert galaxies is visual inspection or using a quantity defined as a flux ratio between the Balmer line and forbidden line. One algorithm of deep learning is the convolution neural network (CNN), which has shown successful classification results.
openaire +6 more sources
On black hole masses, radio-loudness and bulge luminosities of Seyfert galaxies [PDF]
, 2001 We estimated black hole masses for 9 Seyfert 1 and 13 Seyfert 2 galaxies in the Palomar and CfA bright Seyfert samples using the tight correlation between black hole mass and bulge velocity dispersion.
Adams +62 more
core +4 more sources
Soft X-ray properties of a spectroscopically selected sample of interacting and isolated Seyfert galaxies [PDF]
, 2001 We present a catalogue of ROSAT detected sources in the sample of spectroscopically selected Seyfert 1 and Seyfert 2 galaxies of Rafanelli et al. (1995). The catalogue contains 102 Seyfert 1 and 36 Seyfert 2 galaxies. The identification is based on X-ray
Boller, T, Pfefferkorn, F, Rafanelli, P
core +3 more sources
The Multitude of Unresolved Continuum Sources at 1.6 microns in Hubble Space Telescope images of Seyfert Galaxies [PDF]
, 1999 We examine 112 Seyfert galaxies observed by the Hubble Space Telescope (HST) at 1.6 microns. We find that ~50% of the Seyfert 2.0 galaxies which are part of the Revised Shapeley-Ames (RSA) Catalog or the CfA redshift sample contain unresolved continuum ...
A. Alonso‐Herrero +18 more
core +6 more sources
Dust lanes, thick absorbers, and the unification model for Seyfert galaxies [PDF]
arXiv, 2000 A modification of the popular unification model for Seyfert galaxies is proposed, which takes into account recent observational findings on the statistical properties of both type 1 and type 2 Seyferts.
Matt, Giorgio
core +2 more sources
THE MID-INFRARED CONTINUA OF SEYFERT GALAXIES [PDF]
The Astrophysical Journal, 2009 25 pages, 3 tables, 11 figures; Accepted for Publication in Nov.
Steven B. Kraemer +3 more
openaire +3 more sources