银心内秒差距区SiO脉泽的ATCA探测
ATCA Detection of SiO Masers in the Inner Parsecs of the Galactic Center
摘要:
介绍了澳大利亚望远镜紧凑阵列(ATCA)对银河系中心(GC)内秒差距内SiO脉泽的灵敏观测。在GC内部25角秒(1秒差距)内,我们探测到5个SiO J=2-1,v=1(86 GHz)脉泽。所有探测到的86 GHz SiO脉泽都是已知的SiO J=1-0,v=1(43 GHz)脉泽,与晚型星有关。在人马座A ~* 的50角秒(2秒差距)范围内探测到18个43 GHz SiO脉泽。其中7个是首次探测到的,这使得该地区的43 GHz SiO脉泽总数达到22个。
英文摘要:
We present sensitive Australia Telescope Compact Array (ATCA) observations of SiO masers in the inner parsecs of the Galactic center (GC). We detected five SiO J=2-1, v=1 (86 GHz) masers in the innner 25 arcsec (1 pc) of the GC. All the detected 86 GHz SiO masers are previously known SiO J=1-0, v=1 (43 GHz) masers and associated with late-type stars. Eighteen 43 GHz SiO masers were detected within 50 arcsec (2 pc) of Sagittarius A*. Among them, seven are detected for the first time, which brings the total number of 43 GHz SiO masers to 22 in this region.
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