Results 131 to 140 of about 261,296 (275)

Observations of a Magellanic Corona. [PDF]

Nature, 2022
Krishnarao D, Fox AJ, D'Onghia E, Wakker BP, Cashman FH, Howk JC, Lucchini S, French DM, Lehner N.   +8 more
europepmc   +1 more source

On the Role of Minor Galaxy Mergers in the Formation of Active Galactic Nuclei

, 2000
The large scale (~ 100 kpc) environments of Seyfert galaxies are not significantly different from those of non-Seyfert galaxies. In the context of the interaction model of the formation of active galactic nuclei (AGN), it has been proposed that AGN form ...
Genzel R., Laurikainen E., Michael R. Corbin, Petrosian A. R.   +3 more
core   +1 more source

Star formation efficiency and AGN feedback in narrow-line Seyfert 1 galaxies with fast X-ray nuclear winds [PDF]

, 2023
Q. Salomé, Y. Krongold, A. L. Longinotti, M. Bischetti, S. García‐Burillo, O. Vega, M. Sánchez‐Portal, C. Feruglio, María J. Jiménez-Donaire, Maria Vittoria Zanchettin   +9 more
openalex   +1 more source

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

Deep Chandra Observations of NGC 5728. III. Probing the High-resolution X-Ray Morphology and Multiphase Interstellar Medium Interactions in the Circumnuclear Region

The Astrophysical Journal
We 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, G. Fabbiano, M. Elvis, A. Paggi, W. P. Maksym   +4 more
doaj   +1 more source

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

Photometric Study of the Seyfert Galaxy NGC 4151

Open Astronomy, 2016
The results of CCD photometry in the Johnson-Morgan BV R system for the Seyfert galaxy NGC 4151 are reported. The observations were carried out from November 15, 2013 to May 13, 2016 with the 1-m telescope of Tien-Shan Astronomical Observatory of the ...
Shomshekova S. A., Kusakin A. V., Reva I. V.   +2 more
doaj   +1 more source

Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos. [PDF]

Nat Commun, 2021
Kimura SS, Murase K, Mészáros P.
europepmc   +1 more source

Comparison between the Luminosity functions of X-ray and [OIII] selected AGN

, 2009
We investigate claims according to which the X-ray selection of AGN is not as efficient compared to that based on [OIII] selection because of the effects of X-ray absorption.We construct the predicted X-ray luminosity function both for all Seyferts as ...
Akylas, A., Georgantopoulos, I.
core   +1 more source

Molecular Gas during the Post-Starburst Phase: Low Gas Fractions in Green Valley Seyfert Post-Starburst Galaxies

, 2017
Post-starbursts (PSBs) are candidate for rapidly transitioning from star-bursting to quiescent galaxies. We study the molecular gas evolution of PSBs at z ~ 0.03 - 0.2.
Faber, S. M., French, K. Decker, Koo, David C., Yesuf, Hassen M.   +3 more
core   +1 more source