The infrared variability of QSO 3C 273

	The infrared variability of QSO 3C 273
	Wen, SL 1; Peng, ZM 2,3; Fan, JH2 ; Xie GZ(谢光中)4
刊名	CHINESE ASTRONOMY AND ASTROPHYSICS
	2002-10
卷号	26 期号:4 页码:398-403
关键词	galaxies : active quasars : 3C237 galaxies : fundamental parameters infrared : galaxies
ISSN号	0275-1062
通讯作者	Wen, SL (reprint author), Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China.
产权排序	第四完成单位
英文摘要	The near-infrared data of the quasar 3C273 are collected from available literature and are used to analyze its variability properties. The largest amplitudes of variations are DeltaJ = 1.0, DeltaH = 0.9, and DeltaK = 0.86. The color indices are < J - H >= 0.82, < J - K >= 1.96, and < H - K >= 1.13. Analysis with the discrete correlation function (DCF) method indicates that the variability between any two infrared bands is correlated without any time lag. The relation between the color index and brightness is also investigated and the result indicates that the spectrum steepens when the source first dims, while it flattens after the source has dimmed to a some extent, suggesting that the emission of 3C 273 at near-IR consists of at least two components. Some discussions are presented.
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]	BL LACERTAE OBJECTS ; RAY LOUD BLAZARS ; SPECTRAL INDEX ; RADIO
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0275106202000905
语种	英语
WOS记录号	WOS:000180030600003
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6947]
专题	云南天文台_星系研究组
作者单位	1.Department of Physics, Hunan Normal University, Changsha 410081, People's Republic of China 2.Center for Astrophysics, Guangzhou University, Guangzhou 510405, People's Republic of China 3.Department of Physics, Yunnan University, Kunming 650000, People's Republic of China 4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
推荐引用方式 GB/T 7714	Wen, SL,Peng, ZM,Fan, JH,et al. The infrared variability of QSO 3C 273[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2002,26(4):398-403.
APA	Wen, SL,Peng, ZM,Fan, JH,&Xie GZ.(2002).The infrared variability of QSO 3C 273.CHINESE ASTRONOMY AND ASTROPHYSICS,26(4),398-403.
MLA	Wen, SL,et al."The infrared variability of QSO 3C 273".CHINESE ASTRONOMY AND ASTROPHYSICS 26.4(2002):398-403.