Results 101 to 110 of about 184,376 (200)

Emission-Line versus Continuum Correlations in Active Galactic Nuclei [PDF]

open access: yesarXiv, 2006
The Baldwin Effect, a negative correlation between emission-line equivalent width and luminosity in active galactic nuclei, is still of interest as a diagnostic of accretion physics nearly thirty years after its discovery. This review examines recent developments in the study of correlations between line and continuum emission in AGNs, as measured both
arxiv  

Active Galactic Nuclei and gamma rays [PDF]

open access: yesarXiv, 2010
The supermassive black holes harboured in active galactic nuclei are at the origin of powerful jets which can emit copious amounts of gamma-rays. The exact interplay between the infalling matter, the black hole and the relativistic outflow is still poorly known, and this parallel session of the 12th Marcel Grossman meeting intended to offer the most up
arxiv  

Multiwavelength Emission from Jets and Magnetically Arrested Disks in Nearby Radio Galaxies: Application to M87

open access: yesThe Astrophysical Journal
Radio galaxies are a subclass of active galactic nuclei that drive relativistic jets from their center and are observed in radio to very-high-energy gamma rays. The emission mechanisms and regions are still unknown.
Riku Kuze, Shigeo S. Kimura, Kenji Toma
doaj   +1 more source

The optical luminosity function of quasars and low-luminosity active galactic nuclei

open access: yesThe Astronomical Journal, 1987
The optical luminosity function derived from quasars with M(B) less than -23 is extended to include the nuclear luminosities of Seyfert 1 galaxies. The model is fitted to the (total) luminosity data for active galaxies from a complete flux-limited survey.
openaire   +2 more sources

The Stellar Populations of Low‐Luminosity Active Galactic Nuclei. II. Space Telescope Imaging Spectrograph Observations [PDF]

open access: green, 2004
R. M. González Delgado   +7 more
openalex   +1 more source

Very Long Baseline Interferometry Detection of an Active Radio Source Potentially Driving 100 kpc Scale Emission in the Ultraluminous Infrared Galaxy IRAS F01004–2237

open access: yesThe Astrophysical Journal
The nearby ultraluminous infrared galaxy (ULIRG) IRAS F01004−2237 exhibits 100 kpc scale continuum emission at radio wavelengths. The absence of extended X-ray emission in IRAS F01004−2237 has suggested an active galactic nucleus (AGN) origin for the ...
Takayuki J. Hayashi   +2 more
doaj   +1 more source

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