X-ray properties of the quasar He 0450-2958

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	X-ray properties of the quasar He 0450-2958
	Zhou XL(周新霖); Yang F(杨芳); Lv XR(吕晓蓉); Wang JM(王建民); Zhou, XL; Yang, F; Lu, XR; Wang, JM
刊名	ASTRONOMICAL JOURNAL
	2007
卷号	133 期号:2 页码:432-438
关键词	galaxies : active galaxies : individual (HE 0450-2958) infrared : galaxies X-rays : galaxies
通讯作者	Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
英文摘要	We present an XMM-Newton EPIC observation of HE 0450-2958, which may be a "naked" quasar as suggested by Magain and coworkers. The XMM-Newton EPIC spectra show a substantial soft X-ray excess and a steep photon index, as well as marginal evidence for a weak Fe K alpha line. The X-ray absorption is consistent with the Galactic level. The 0.3-10 keV EPIC spectra can be fitted by a power-law plus blackbody model; however, the fit by a relativistically blurred photoionized disk reflection model is better. We estimate a black hole mass of 2(-1.3)(+7) x 10(7) M-circle dot from the X-ray variability. This broadly agrees with the value derived from the optical H beta line width. These results support a high-state Seyfert galaxy as the source. HE 0450-2958 shares properties with transitionary objects from ultraluminous infrared galaxies to quasars. We suggest that HE 0450-2958 is just in the beginning of an optical quasar window.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000243730000008
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237461]
专题	高能物理研究所_粒子天体物理中心高能物理研究所_核技术应用研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhou XL,Yang F,Lv XR,et al. X-ray properties of the quasar He 0450-2958[J]. ASTRONOMICAL JOURNAL,2007,133(2):432-438.
APA	周新霖.,杨芳.,吕晓蓉.,王建民.,Zhou, XL.,...&Wang, JM.(2007).X-ray properties of the quasar He 0450-2958.ASTRONOMICAL JOURNAL,133(2),432-438.
MLA	周新霖,et al."X-ray properties of the quasar He 0450-2958".ASTRONOMICAL JOURNAL 133.2(2007):432-438.