Results 91 to 100 of about 184,376 (200)
Accretion Flows in X--Ray Binaries and Active Galactic Nuclei [PDF]
arXiv, 2001 Hard X-ray emission is ubiquitous in accreting black holes, both in Galactic binary systems and in Active Galactic Nuclei. I review the different spectra which can be seen from these systems, and possible ways of producing this emission. X-ray reflection should give an observational test of these scenarios, but we need better models before this can ...
arxiv
ReveaLLAGN 0: First Look at JWST MIRI Data of Sombrero and NGC 1052
The Astrophysical JournalWe present the first results from the Revealing Low-Luminosity Active Galactic Nuclei (ReveaLLAGN) survey, a JWST survey of seven nearby LLAGNs. We focus on two observations with the Mid-Infrared Instrument (MIRI)’s Medium-Resolution Spectrometer of the ...
Kameron Goold +30 more
doaj +1 more source
Reverberation Mapping of Active Galactic Nuclei [PDF]
, 2004 Reverberation mapping is a proven technique that is used to measure the size of the broad emission-line region and central black hole mass in active galactic nuclei. More ambitious reverberation mapping programs that are well within the capabilities of Hubble Space Telescope could allow us to determine the nature and flow of line-emitting gas in active
arxiv +1 more source
Radio Emission from High-redshift Active Galactic Nuclei in the JADES and CEERS Surveys
The Astronomical JournalRecent calculations indicate that radio emission from quasars at z ∼ 6–7 could be detected at much earlier stages of evolution, at z ∼ 14–15, by the Next-Generation Very Large Array (ngVLA) and the Square Kilometer Array (SKA).
Muhammad A. Latif +2 more
doaj +1 more source
Starburst Clusters in Galactic Nuclei [PDF]
arXiv, 2000 Galactic nuclei often harbor a disproportionately large amount of star formation activity with respect to their surrounding disks. Not coincidentally, the density of molecular material in galactic nuclei is often also much greater than that in disks (Table 1 in Kennicutt 1998).
arxiv
THE RELATION OF OPTICAL/ULTRAVIOLET AND X-RAY EMISSION IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2011 21 pages, 1 table, 5 figures.
openaire +4 more sources
The Black Hole-Host Galaxy Relation in Active Galactic Nuclei [PDF]
arXiv, 2000 The masses of the central black holes of Active Galactic Nuclei estimated by the reverberation virial technique seem to be significantly smaller than predicted from the black hole mass-bulge luminosity relation for massive black holes detected by kinematic methods in less active and normal galaxies.
arxiv
Ensemble Variability Properties of Active Galactic Nuclei in the SDSS DR17
The Astrophysical JournalWe present the results from a study of ∼9600 broadline-selected active galactic nuclei (AGNs) with host galaxies detected from the Sloan Digital Sky Survey (SDSS) Data Release 17.
Krittapas Chanchaiworawit +1 more
doaj +1 more source
Conference Summary: The Central Engine of Active Galactic Nuclei [PDF]
arXiv, 2007 The 2006 meeting in Xi'an on the Central Engine of Active Galactic Nuclei covered the enormous and continuously expanding area of AGN research, from theory to the most sophisticated observations and from gamma-ray energies to long radio wavelengths.
arxiv
Strongly Magnetized Accretion with Low Angular Momentum Produces a Weak Jet
The Astrophysical JournalWe study the spherical accretion of magnetized plasma with low angular momentum onto a supermassive black hole, utilizing global general relativistic magnetohydrodynamic simulations.
Alisa Galishnikova +4 more
doaj +1 more source