ON THE BL LACERTAE OBJECTS/RADIO QUASARS AND THE FR I/II DICHOTOMY

	ON THE BL LACERTAE OBJECTS/RADIO QUASARS AND THE FR I/II DICHOTOMY
	Xu, Ya-Di 1; Cao, Xinwu2 ; Wu, Qingwen 3
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2009-04-01
卷号	694 期号:2 页码:L107-L110
关键词	black hole physics BL Lacertae objects: general galaxies: active galaxies: nuclei quasars: emission lines
英文摘要	In the frame of unification schemes for radio-loud active galactic nuclei (AGNs), FR I radio galaxies are believed to be BL Lacertae (BL Lac) objects with the relativistic jet misaligned to our line of sight, and FR II radio galaxies correspond to misaligned radio quasars. The Ledlow-Owen dividing line for the FR I/FR II dichotomy in the optical absolute magnitude of the host galaxy-radio luminosity (M(R)-L(Rad)) plane can be translated to the line in the black hole mass-jet power (M(bh)-Q(jet)) plane by using two empirical relations: Q(jet)-L(Rad) and M(bh)-M(R). We use a sample of radio quasars and BL Lac objects with measured black hole masses to explore the relation of the jet power with black hole mass, in which the jet power is estimated from the extended radio emission. It is found that the BL Lac objects are clearly separated from radio quasars by the Ledlow-Owen FR I/II dividing line in the M(bh)-Q(jet) plane. This strongly supports the unification schemes for FR I/BL Lac object and FR II/radio quasar. We find that the Eddington ratios L(bol)/L(Edd) of BL Lac objects are systematically lower than those of radio quasars in the sample with a rough division at L(bol)/L(Edd) similar to 0.01, and the distribution of Eddington ratios of BL Lac objects/quasars exhibits a bimodal nature, which imply that the accretion mode of BL Lac objects may be different from that of radio quasars.
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 ; ADVECTION-DOMINATED ACCRETION ; I RADIO GALAXIES ; OPTICAL SPECTROSCOPY ; BLACK-HOLE ; PARENT POPULATION ; LAC OBJECTS ; LUMINOSITY FUNCTIONS ; ABELL CLUSTERS ; EMISSION-LINE
收录类别	SCI
语种	英语
WOS记录号	WOS:000264196600004
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19965]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Korean Astron & Space Sci Inst, Int Ctr Astrophys, Taejon 305348, South Korea
推荐引用方式 GB/T 7714	Xu, Ya-Di,Cao, Xinwu,Wu, Qingwen. ON THE BL LACERTAE OBJECTS/RADIO QUASARS AND THE FR I/II DICHOTOMY[J]. ASTROPHYSICAL JOURNAL LETTERS,2009,694(2):L107-L110.
APA	Xu, Ya-Di,Cao, Xinwu,&Wu, Qingwen.(2009).ON THE BL LACERTAE OBJECTS/RADIO QUASARS AND THE FR I/II DICHOTOMY.ASTROPHYSICAL JOURNAL LETTERS,694(2),L107-L110.
MLA	Xu, Ya-Di,et al."ON THE BL LACERTAE OBJECTS/RADIO QUASARS AND THE FR I/II DICHOTOMY".ASTROPHYSICAL JOURNAL LETTERS 694.2(2009):L107-L110.