The radio counter-jet of the QSO 3C 48

	The radio counter-jet of the QSO 3C 48
	Feng, WX ; An, T; Hong, XY ; Zhao, JH ; Venturi, T ; Shen, ZQ ; Wang, WH
刊名	ASTRONOMY & ASTROPHYSICS
	2005-04-01
卷号	434 期号:1 页码:101-107
关键词	galaxies : quasars : individual : 3C 48 galaxies : jets galaxies : interactions
通讯作者	Astronomy&Astrophysics
英文摘要	We present multi- frequency radio observational results of the quasar 3C 48. The observations were carried out with the Very Large Array ( VLA) at five frequencies, 0.33, 1.5, 4.8, 8.4, and 22.5 GHz, and with the Multi- Element Radio Linked Interferometer Network ( MERLIN) at the two frequencies of 1.6 and 5 GHz. The source shows a one- sided jet to the north within 1", which then extends to the northeast and becomes diffuse. Two bright components ( N2 and N3), containing most of the flux density, are present in the northern jet. The spectral index of the two components is alpha(N2) similar to -0.99 +/- 0.12 and alpha(N3) similar to - 0.84 +/- 0.23 ( S proportional to nu(alpha)). Our images show the presence of an extended structure surrounding component N2, suggestive of strong interaction between the jet and the interstellar medium ( ISM) of the host galaxy. A steep- spectrum component, labelled S, located 0.25 " southwest to the flat- spectrum component which could be the core of 3C 48, is detected at a significance of > 15 sigma. Both the location and the steepness of the spectrum of component S suggest the presence of a counter- jet in 3C 48.
学科主题	射电天文学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	STEEP-SPECTRUM SOURCES ; HOST GALAXY ; CALIBRATORS ; SCALE ; 3C-48
收录类别	SCI
语种	英语
WOS记录号	WOS:000228097300013
公开日期	2010-04-29
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/8023]
专题	上海天文台_VLBI研究室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 5.CNR, Ist Radioastron, I-4129 Bologna, Italy
推荐引用方式 GB/T 7714	Feng, WX,An, T,Hong, XY,et al. The radio counter-jet of the QSO 3C 48[J]. ASTRONOMY & ASTROPHYSICS,2005,434(1):101-107.
APA	Feng, WX.,An, T.,Hong, XY.,Zhao, JH.,Venturi, T.,...&Wang, WH.(2005).The radio counter-jet of the QSO 3C 48.ASTRONOMY & ASTROPHYSICS,434(1),101-107.
MLA	Feng, WX,et al."The radio counter-jet of the QSO 3C 48".ASTRONOMY & ASTROPHYSICS 434.1(2005):101-107.