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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
Source PublicationASTROPHYSICAL JOURNAL
2017-08-10
Volume845Issue:1
DOI10.3847/1538-4357/aa7e76
Contribution Rank第1完成单位
Indexed BySCI
KeywordCircumstellar Matter Line: Profiles Masers Stars: Individual (Cw Leo) Stars: Variables: General Submillimeter: Stars
Abstract

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.

Funding ProjectVietnam'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)
Funding OrganizationVietnam'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)
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000407329800017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDYNAMIC-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
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11888
Collection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
Corresponding AuthorHe JH(何金华)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
He JH,Dinh-V-Trung,Hasegawa, T. I.. Monitor Variability of Millimeter Lines in IRC+10216[J]. ASTROPHYSICAL JOURNAL,2017,845(1).
APA He JH,Dinh-V-Trung,&Hasegawa, T. I..(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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