论文标题
86 GHz Sio Masers在银河系中心哦/IR星星
86 GHz SiO masers in Galactic Centre OH/IR stars
论文作者
论文摘要
我们介绍了搜索86.243 GHz SIO（j = 2-1，v = 1）Maser对位于银河系中心附近的67 OH/IR星星的发射。我们检测到32个光谱峰，其中28个对应于这些OH/IR星的信封产生的Sio Maser系。在OH/IR星星中，我们获得了大约40％的SIO MASER检测率。我们在86.18 GHz的OH/IR星中偶然地检测到另外两条线，这可能是由于CCS-MOLECULE TRUNTITION在86.181 GHz处或可能是在86.178 GHz处的非常激发的OH分子过渡。发现具有中型空间实验（MSX）A -e <2.5 mag的来源的86 GHz Maser发射的检测率约为60％；但是，使用MSX A -e> 2.5 mag的最红色OH/IR星降至25％。这支持了Messineo等人的假设。 （2002年），Sio Masers主要是在相对较薄的室内材料中发现的。
We present results on a search for 86.243 GHz SiO (J = 2 -- 1, v = 1) maser emission toward 67 OH/IR stars located near the Galactic Centre. We detected 32 spectral peaks, of which 28 correspond to SiO maser lines arising from the envelopes of these OH/IR stars. In OH/IR stars, we obtained an SiO maser detection rate of about 40%. We serendipitously detected two other lines from OH/IR stars at 86.18 GHz, which could be due to a CCS-molecule transition at 86.181 GHz or probably to an highly excited OH molecular transition at 86.178 GHz. The detection rate of 86 GHz maser emission is found to be about 60% for sources with The Midcourse Space Experiment (MSX) A - E < 2.5 mag; but it drops to 25% for the reddest OH/IR stars with MSX A - E > 2.5 mag. This supports the hypothesis by Messineo et al. (2002) that the SiO masers are primarily found in relatively thinner circumstellar material.
