Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy

	Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy
	Wang DL(王德良)1,2 ; Wang JG(王建国)1,2 ; Dong, XB3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2009-10
卷号	9 期号:10 页码:1078-1102
关键词	galaxies: active galaxies: quasars BL Lacerate objects: general X-rays: general radio continuum: general
ISSN号	1674-4527
通讯作者	Wang, DL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Results of extended and refined optical identification of 181 radio/X-ray sources in the RASS-Green Bank (RGB) catalog are presented (Brinkmann et al. 1997) which have been spectroscopically observed in the Sloan Digital Sky Survey (SDSS) DR5. The SDSS spectra of the optical counterparts are modeled in a careful and self-consistent way by incorporating the host galaxy's starlight. Optical emission line parameters are presented, which are derived accurately and reliably, along with the radio 1.4-5 GHz spectral indices estimated using (non-simultaneous) archival data. For 72 sources, the identifications are presented for the first time. It is confirmed that the majority of strong radio/X-ray emitters are radio-loud active galactic nuclei (AGNs), particularly blazars. Taking advantage of the high spectral quality and resolution and our refined spectral modeling, we are able to disentangle narrow line radio galaxies (NLRGs), as vaguely termed in most previous identification work, into Seyfert II galaxies and LINERs (low-ionization nuclear emission regions), based on the standard emission line diagnostics. The NLRGs in the RGB sample, mostly belonging to 'weak line radio galaxies', are found to have optical spectra consistent predominantly with LINERs, and only a small fraction with Seyfert II galaxies. A small number of LINERs have radio power as high as 10(23)-10(26) W Hz(-1) at 5 GHz, being among the strongest radio emitting LINERs known so far. Two sources are identified with radio-loud narrow line Seyfert I galaxies (NLS1s), a class of rare objects. The presence is also confirmed of flat-spectrum radio quasars whose radio-optical-X-ray effective spectral indices are similar to those of High-energy peaked BL Lacs (HBLs), as suggested by Padovani et al., although it is still a debate as to whether this is the case for their actual spectral energy distributions.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; LINE SEYFERT-1 GALAXIES ; BL-LACERTAE OBJECTS ; BLACK-HOLE MASSES ; SPECTRAL ENERGY-DISTRIBUTIONS ; BRIGHT QUASAR SURVEY ; EARLY DATA RELEASE ; EMISSION-LINE ; HOST GALAXIES ; SEDENTARY SURVEY
收录类别	SCI
原文出处	http://iopscience.iop.org/1674-4527/9/10/002/
语种	英语
WOS记录号	WOS:000271266300002
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4975]
专题	云南天文台_高能天体物理研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of the Chinese Academy of Sciences, Beijing 100039, China 3.Center for Astrophysics, University of Science and Technology of China, Hefei 230026, China
推荐引用方式 GB/T 7714	Wang DL,Wang JG,Dong, XB. Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(10):1078-1102.
APA	Wang DL,Wang JG,&Dong, XB.(2009).Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(10),1078-1102.
MLA	Wang DL,et al."Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.10(2009):1078-1102.