DISK-JET CONNECTION IN THE RADIO GALAXY 3C 120

	DISK-JET CONNECTION IN THE RADIO GALAXY 3C 120
	Chatterjee, Ritaban 1; Marscher, Alan P.1; Jorstad, Svetlana G.1,2; Olmstead, Alice R.1; McHardy, Ian M.3; Aller, Margo F.4; Aller, Hugh D.4; Lahteenmaki, Anne 5; Tornikoski, Merja 5; Hovatta, Talvikki 5
刊名	ASTROPHYSICAL JOURNAL
	2009-10-20
卷号	704 期号:2 页码:1689-1703
关键词	galaxies: active galaxies: individual (3C 120) galaxies: jets radio continuum: galaxies X-rays: galaxies
英文摘要	We present the results of extensive multi-frequency monitoring of the radio galaxy 3C 120 between 2002 and 2007 at X-ray (2-10 keV), optical (R and V bands), and radio (14.5 and 37 GHz) wave bands, as well as imaging with the Very Long Baseline Array (VLBA) at 43 GHz. Over the 5 yr of observation, significant dips in the X-ray light curve are followed by ejections of bright superluminal knots in the VLBA images. Consistent with this, the X-ray flux and 37 GHz flux are anti-correlated with X-ray leading the radio variations. Furthermore, the total radiative output of a radio flare is related to the equivalent width of the corresponding X-ray dip. This implies that, in this radio galaxy, the radiative state of accretion disk plus corona system, where the X-rays are produced, has a direct effect on the events in the jet, where the radio emission originates. The X-ray power spectral density of 3C 120 shows a break, with steeper slope at shorter timescale and the break timescale is commensurate with the mass of the central black hole (BH) based on observations of Seyfert galaxies and black hole X-ray binaries (BHXRBs). These findings provide support for the paradigm that BHXRBs and both radio-loud and radio-quiet active galactic nuclei are fundamentally similar systems, with characteristic time and size scales linearly proportional to the mass of the central BH. The X-ray and optical variations are strongly correlated in 3C 120, which implies that the optical emission in this object arises from the same general region as the X-rays, i.e., in the accretion disk-corona system. We numerically model multi-wavelength light curves of 3C 120 from such a system with the optical-UV emission produced in the disk and the X-rays generated by scattering of thermal photons by hot electrons in the corona. From the comparison of the temporal properties of the model light curves to that of the observed variability, we constrain the physical size of the corona and the distances of the emitting regions from the central BH. In addition, we discuss physical scenarios for the disk-jet connection that are consistent with our observations.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; POWER-DENSITY SPECTRUM ; LINE REGION SIZES ; X-RAY VARIABILITY ; ACCRETION DISKS ; POLARIMETRIC OBSERVATIONS ; SEYFERT-1 GALAXIES ; HIGH-FREQUENCIES ; GRS 1915+105 ; BLACK-HOLES
收录类别	SCI
语种	英语
WOS记录号	WOS:000270486200051
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19541]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA 2.St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia 3.Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England 4.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA 5.Helsinki Univ Technol, TKK, Metsahovi Radio Observ, FIN-02540 Kylmala, Finland 6.Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA 7.Bucknell Univ, Dept Phys, Lewisburg, PA 17837 USA 8.Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA 9.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA 10.Southwestern Univ, Dept Phys, Georgetown, TX 78627 USA
推荐引用方式 GB/T 7714	Chatterjee, Ritaban,Marscher, Alan P.,Jorstad, Svetlana G.,et al. DISK-JET CONNECTION IN THE RADIO GALAXY 3C 120[J]. ASTROPHYSICAL JOURNAL,2009,704(2):1689-1703.
APA	Chatterjee, Ritaban.,Marscher, Alan P..,Jorstad, Svetlana G..,Olmstead, Alice R..,McHardy, Ian M..,...&Wheeler, Kathleen.(2009).DISK-JET CONNECTION IN THE RADIO GALAXY 3C 120.ASTROPHYSICAL JOURNAL,704(2),1689-1703.
MLA	Chatterjee, Ritaban,et al."DISK-JET CONNECTION IN THE RADIO GALAXY 3C 120".ASTROPHYSICAL JOURNAL 704.2(2009):1689-1703.