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题名: CONSTRAINING THE FLARING REGION OF SAGITTARIUS A* BY 1.3 mm VLBI MEASUREMENTS
作者: Huang, Lei1, 2; Shen, Zhi-Qiang1, 2; Gao, Feng1, 3
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2012-02-01
卷号: 745, 期号:2
关键词: Galaxy: center ; submillimeter: general
DOI: 10.1088/2041-8205/745/2/L20
文章类型: Article
英文摘要: We use a model of an accretion flow coupled with an emergent flare to interpret the latest 1.3 mm very long baseline interferometry (VLBI) measurements for Sagittarius A*. The visibility data constrained the distances from the flare center to the black hole center as d(EW) less than or similar to 20 R-g and d(NS) less than or similar to 80 R-g in the east-west and north-south directions, respectively. If interpreted by the hot-spot model, the flare was preferred to pass in front of the black hole at a radius much larger than d(EW). If interpreted by the episodic jet launched from a nearly edge-on hot accretion flow, the flare was preferred to be ejected with theta(j) greater than or similar to 40. off the black hole rotating axis. This method can be generalized to help us understand future submillimeter VLBI observations and study the millimeter/submillimeter variabilities in the vicinity of the Galactic center supermassive black hole.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SUPERMASSIVE BLACK-HOLE ; GALACTIC-CENTER ; ACCRETION FLOW ; SGR-A ; MILLIMETER-VLBI ; HORIZON ; SIMULATIONS ; EMISSION ; MODELS ; MILKY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000300228800005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15540
Appears in Collections:暗物质和空间天文实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100864, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
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