Results 91 to 100 of about 6,380 (236)

Neutral hydrogen studies of the Seyfert galaxy NGC 3227 [PDF]

, 1995
C. G. Mundell, A. Pedlar, D. J. Axon, J. Meaburn, S. W. Unger   +4 more
openalex   +1 more source

Mapping the Narrow-Line Seyfert 1 Galaxy 1H 0323+342

Universe, 2019
Taking advantage of the most recent measurements by means of high-resolution radio observations and other multiwavelength campaigns, it is possible to elaborate a detailed map of the narrow-line Seyfert 1 Galaxy 1H 0323 + 342 .
Luigi Foschini, Stefano Ciroi, Marco Berton, Stefano Vercellone, Patrizia Romano, Valentina Braito   +5 more
doaj   +1 more source

The broad-bandXMM-NewtonandINTEGRALspectra of bright type 1 Seyfert galaxies [PDF]

, 2008
F. Panessa, L. Bassani, A. De Rosa, A. J. Bird, A. J. Dean, M. Fiocchi, A. Malizia, M. Molina, P. Ubertini, R. Walter   +9 more
openalex   +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

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

Toward explaining Seyfert galaxies

The Astrophysical Journal, 1983
Galaxies with extensive star formation in their nuclei (star-burst galaxies) produce up to 10/sup 9/ M/sub sun/ of compact stellar remnants in their nuclei. Data for the kinematics of these remnants imply that a significant fraction can settle into nuclear volumes of radii 1 pc.
openaire   +1 more source

THE ROLE OF RADIATION PRESSURE IN THE NARROW LINE REGIONS OF SEYFERT HOST GALAXIES [PDF]

, 2016
Rebecca L. Davies, Michael A. Dopita, Lisa Kewley, Brent Groves, Ralph Sutherland, Elise J. Hampton, Prajval Shastri, Preeti Kharb, Harish Bhatt, Julia Scharwächter, Chichuan Jin, Julie Banfield, Ingyin Zaw, Bethan James, Stéphanie Juneau, Shweta Srivastava   +15 more
openalex   +1 more source

Star Formation in the Dwarf Seyfert Galaxy NGC 4395: Evidence for Both AGN and SN Feedback? [PDF]

, 2023
Payel Nandi, C. S. Stalin, D. J. Saikia, S. Muneer, G. Mountrichas, Dominika Wylezalek, R. Sagar, M. Kissler‐Patig   +7 more
openalex   +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