DETERMINATION OF CENTRAL ENGINE POSITION AND ACCRETION DISK STRUCTURE IN NGC 4261 BY CORE SHIFT MEASUREMENTS

ABSTRACT We report multifrequency phase-referenced observations of the nearby radio galaxy NGC 4261, which has prominent two-sided jets, using the Very Long Baseline Array at 1.4-43 GHz. We measured radio core positions showing observing frequency dependences (known as "core shift") in bot...

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Veröffentlicht in:	The Astrophysical journal 2015-07, Vol.807 (1), p.1-15
Hauptverfasser:	Haga, Takafumi, Doi, Akihiro, Murata, Yasuhiro, Sudou, Hiroshi, Kameno, Seiji, Hada, Kazuhiro
Format:	Artikel
Sprache:	eng
Schlagworte:	Accretion ACCRETION DISKS accretion, accretion disks Arrays ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BLACK HOLES DENSITY Engines FREQUENCY DEPENDENCE galaxies: active galaxies: individual (NGC 4261) galaxies: jets GHZ RANGE Infinity JETS OPACITY Position measurement QUASARS quasars: supermassive black holes RADIO GALAXIES SCHWARZSCHILD RADIUS SELF-ABSORPTION STAR CLUSTERS
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