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Does the masing gas fall inward VY CMa-
Zheng Xingwu1; Jarken Esimbek2
2001
Source PublicationChinese Physics Letters
ISSN0256-307X
Volume18Issue:3Pages:458
AbstractThe water maser emission from the unusual supergiant, VY CMa, has been observed with the Urumqi 25m radio telescope. A simple redshifted maser spectrum was detected in the 1.6 Jy noise level during our monitoring observations. All of the H2O maser features are redshifted with respect to the VY CMa stellar velocity of I 7.6 km .s(-1). The spectrum appears to consist of two striking like groups and each group has three features. The appearances and the ratio of these three features in the two maser groups are very similar. The H2O maser emission arises from a region close to the supergiant, about 10 stellar radii of the star. The simple redshifted spectrum could be due to infall masing gas on the near side of the disk. Pulsation of the central star causes oscillations in this portion of the envelope, with the shock wave propagating outward and with material falling inward. The masing gas motions are very complex, by which the dramatic changes or the quasi-sinusoidal fluctuation in Aux may be explained.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53411
Collection中国科学院国家天文台
Affiliation1.南京大学
2.中国科学院国家天文台
Recommended Citation
GB/T 7714
Zheng Xingwu,Jarken Esimbek. Does the masing gas fall inward VY CMa-[J]. Chinese Physics Letters,2001,18(3):458.
APA Zheng Xingwu,&Jarken Esimbek.(2001).Does the masing gas fall inward VY CMa-.Chinese Physics Letters,18(3),458.
MLA Zheng Xingwu,et al."Does the masing gas fall inward VY CMa-".Chinese Physics Letters 18.3(2001):458.
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