The center of activity in the compact steep-spectrum superluminal source 3C 138

doi:10.1086/428284

	The center of activity in the compact steep-spectrum superluminal source 3C 138
	Shen, ZQ 1; Shang, LL 1,2; Cai, HB 1,2; Chen, X 1,2; Jiang, DR 1; Chen, YJ 1; Liu, X3 ; Yang, R 4; Kameno, S 5; Hirabayashi, H 6
	2005-04-01
Source Publication	ASTROPHYSICAL JOURNAL
Volume	622 Issue:2 Pages:811-815
Contribution Rank	3
Abstract	We present the results from the first quasi-simultaneous multifrequency (2.3, 5.0, 8.4, and 15 GHz) very long baseline interferometry (VLBI) observations of the compact steep-spectrum (CSS) superluminal source 3C 138. For the first time, the spectral distribution of the components within its central 10 milliarcsecond (mas) region was obtained. This enables us to identify the component at the western end as the location of the nuclear activity, assuming that the central engine is associated with one of the detected components. The possibility that none of these visible components is the true core is also discussed. The new measurements further clarify the superluminal motions of its inner jet components. The multifrequency data reveal a convex spectrum in one jet component, implying the existence of free-free absorption by the ambient dense plasma.
Keyword	Galaxies : Active Galaxies : Jets Galaxies : Nuclei Quasars : Individual (3c 138) Radio Continuum : Galaxies Techniques : Interferometric
Subtype	Article
DOI	10.1086/428284
WOS Headings	Science & Technology ; Physical Sciences
Indexed By	SCI
Language	英语
WOS Keyword	RADIO-SOURCES ; VLBI ; MOTION
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000228093400004
Citation statistics	Cited Times:7[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/810
Collection	射电天文研究室_星系宇宙学研究团组射电天文研究室
Affiliation	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Natl Astron Observ, Urumqi Observ, Urumqi 830011, Xinjiang, Peoples R China 4.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China 5.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 6.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan
Recommended Citation GB/T 7714	Shen, ZQ,Shang, LL,Cai, HB,et al. The center of activity in the compact steep-spectrum superluminal source 3C 138[J]. ASTROPHYSICAL JOURNAL,2005,622(2):811-815.
APA	Shen, ZQ.,Shang, LL.,Cai, HB.,Chen, X.,Jiang, DR.,...&Hirabayashi, H.(2005).The center of activity in the compact steep-spectrum superluminal source 3C 138.ASTROPHYSICAL JOURNAL,622(2),811-815.
MLA	Shen, ZQ,et al."The center of activity in the compact steep-spectrum superluminal source 3C 138".ASTROPHYSICAL JOURNAL 622.2(2005):811-815.

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