Results 121 to 130 of about 125,183 (220)

The extent of ionization in simulations of radio-loud AGNs impacting kpc gas discs. [PDF]

Mon Not R Astron Soc, 2022
Meenakshi M, Mukherjee D, Wagner AY, Nesvadba NPH, Morganti R, Janssen RMJ, Bicknell GV.   +6 more
europepmc   +1 more source

Narrow-Line Seyfert 1 Galaxies

, 2007
To appear in the proceedings of "The nuclear region, host galaxy and environment of AGN", E. Benitez, I. Cruz-Gonzalez & Y.
openaire   +3 more sources

The Disk Wind Contribution to the Gamma-Ray Emission from the Nearby Seyfert Galaxy GRS 1734−292

The Astrophysical Journal
Radio-quiet Seyfert galaxies have been detected in GeV gamma rays by the Fermi Large Area Telescope (LAT), but the origin of much of this emission is unclear.
Nobuyuki Sakai, Tomoya Yamada, Yoshiyuki Inoue, Ellis R. Owen, Tomonari Michiyama, Ryota Tomaru, Yasushi Fukazawa   +6 more
doaj   +1 more source

SPECTRAL AND PHOTOMETRIC STUDIES OF MRK6 AND MRK1040 IN THE OPTICAL RANGE

Eurasian Physical Technical Journal
This paper is dedicated to the study of variability in active galactic nuclei, which play a key role in understanding the physical processes occurring in their central regions.
S.A. Shomshekova, E.K. Denissyuk, L.N. Kondratyeva, A.V. Serebryanskiy, G.K. Aimanova, L. Aktay   +5 more
doaj   +1 more source

Unification Model of Seyfert Galaxies: Are All Seyfert 2 Galaxies Created Equal?

, 2002
2 pages, 2 figures to be published in the proceedings of "Active Galactic Nuclei: From Central Engine to Host Galaxy", Meudon, France, 23-27 July, 2002, ASP Conference Series, Eds. S. Collin, F.
openaire   +2 more sources

X-ray emission from obscured Seyfert galaxies.

, 1973
This thesis describes aspects of the X-ray emission from Seyfert 2 galaxies and the rather anomalous Seyfert 1 galaxy NGC 4151. A re-analysis of the Ginga observation of NGC 1068 is presented in Chapter 3.
D. G. (David Glynn) Smith (7693448)
core   +2 more sources

Spitzer IRS Observations of Seyfert 1.8 and 1.9 Galaxies: A Comparison with Seyfert 1 and Seyfert 2 [PDF]

, 2007
We present Spitzer mid-infrared spectra of 12 Seyfert 1.8 and 1.9 galaxies over the 5-38 μm region. We compare the spectral characteristics of this sample to those of 58 Seyfert 1 and 2 galaxies from the Spitzer archives.
Turner, T. J., Kraemer, S. B., Teplitz, H., Crenshaw, D. M., Elitzur, M., Deo, R. P., Dietrich, M.   +6 more
core  

The Host Galaxy Fluxes of Active Galaxy Nuclei Are Generally Overestimated by the Flux Variation Gradient Method

Universe
In terms of the variable nature of normal active galaxy nuclei (AGN) and luminous quasars, a so-called flux variation gradient (FVG) method has been widely utilized to estimate the underlying non-variable host galaxy fluxes.
Minxuan Cai, Zhen Wan, Zhenyi Cai, Lulu Fan, Junxian Wang   +4 more
doaj   +1 more source

Soft X-ray properties of a spectroscopically selected sample of interacting and isolated Seyfert galaxies

, 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. (\cite{Rafanelli95}). The catalogue contains 102 Seyfert 1 and 36 Seyfert 2 galaxies.
P. Rafanelli, F. Pfefferkorn, PFEFFERKORN F., Th. Boller, RAFANELLI, PIERO, BOLLER T.H.   +5 more
core   +1 more source

Anomalous Narrow Line Seyfert I Galaxies from SDSS DR17

The Astrophysical Journal
We present an analysis of 22,656 narrow-line Seyfert 1 galaxies (NLSy1s) from the Sloan Digital Sky Survey (SDSS) DR17 (0.1 ≤ z ≤ 0.9), identifying a sample of spectroscopically anomalous sources.
Arihant Tiwari, Rachana, M. Vivek, Suvendu Rakshit   +3 more
doaj   +1 more source