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Monitor Variability of Millimeter Lines in IRC+10216
He JH(何金华)1,2,3,4; Dinh-V-Trung5; Hasegawa, T. I.6; He, J. H.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-08-10
卷号845期号:1
DOI10.3847/1538-4357/aa7e76
产权排序第1完成单位
收录类别SCI
关键词Circumstellar Matter Line: Profiles Masers Stars: Individual (Cw Leo) Stars: Variables: General Submillimeter: Stars
摘要A single dish monitoring of millimeter maser lines SiS J = 14-13 and HCN v(2) = 1(f) J = 3-2 and several other rotational lines is reported for the archetypal carbon star IRC+10216. Relative line strength variations of 5% similar to 30% are found for eight molecular line features with respect to selected reference lines. Definite line-shape variations are found in limited velocity intervals of the SiS and HCN line profiles. The asymmetrical line profiles of the two lines are mainly due to the varying components. The dominant varying components of the line profiles have similar periods and phases to the IR light variation, though both quantities show some degree of velocity dependence; there is also variability asymmetry between the blue and red line wings of both lines. Combining the velocities and amplitudes with a wind velocity model, we suggest that the line profile variations are due to SiS and HCN masing lines emanating from the wind acceleration zone. The possible link of the variabilities to thermal, dynamical, and/or chemical processes within or under this region is also discussed.
项目资助者Vietnam's National Foundation for Science and Technology (NAFOSTED)(103.99-2014.82) ; Academia Sinica, Institute of Astronomy and Astrophysics (ASIAA), Taiwan ; Chinese Academy of Sciences (CAS)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000407329800017
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DYNAMIC-MODEL ATMOSPHERES ; CARBON STAR IRC+10216 ; SUBMILLIMETER HCN LASER ; SIS MASER EMISSION ; VY CANIS MAJORIS ; AGB STARS ; CIRCUMSTELLAR ENVELOPE ; MOLECULAR-SPECTROSCOPY ; RADIATIVE-TRANSFER ; COLOGNE DATABASE
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11888
专题大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
通讯作者He, J. H.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China
2.Chinese Academy of Sciences South America Center for Astronomy, China-Chile Joint Center for Astronomy, Camino El Observatorio #1515, Las Condes, Santiago, Chile
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
5.Institute of Physics, Vietnam Academy of Science and Technology, 10 DaoTan, BaDinh, Hanoi, Vietnam
6.Academia Sinica, Astronomy and Astrophysics, AS/NTU. No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
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GB/T 7714
He JH,Dinh-V-Trung,Hasegawa, T. I.,et al. Monitor Variability of Millimeter Lines in IRC+10216[J]. ASTROPHYSICAL JOURNAL,2017,845(1).
APA He JH,Dinh-V-Trung,Hasegawa, T. I.,&He, J. H..(2017).Monitor Variability of Millimeter Lines in IRC+10216.ASTROPHYSICAL JOURNAL,845(1).
MLA He JH,et al."Monitor Variability of Millimeter Lines in IRC+10216".ASTROPHYSICAL JOURNAL 845.1(2017).
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