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High-resolution spectroscopy of the extremely iron-poor post-AGB star CCLyr
Aoki, Wako1,2; Matsuno, Tadafumi1,2; Honda, Satoshi3; Parthasarathy, Mudumba4; Li, Haining5; Suda, Takuma6
2017-04-01
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume69Issue:2
AbstractHigh-resolution optical spectroscopy was conducted for the metal-poor post-AGB star CC Lyr to determine its chemical abundances and spectral line profiles. Our standard abundance analysis confirms its extremely low metallicity ([Fe/H] < -3.5) and a clear correlation between abundance ratios and the condensation temperature for 11 elements, indicating that dust depletion is the cause of the abundance anomaly of this object. The very low abundances of Sr and Ba, which are detected for the first time for this object, suggest that heavy neutron-capture elements are not significantly enhanced in this object by the s-process during its evolution through the AGB phase. The radial velocity of this object and profiles of some atomic absorption lines show variations depending on pulsation phases, which could be formed by dynamics of the atmosphere rather than by binarity or contributions of circumstellar absorption. On the other hand, the Ha emission with double peaks shows no evident velocity shift, suggesting that the emission is originating from the circumstellar matter, presumably the rotating disk around the object.
SubtypeArticle
KeywordCircumstellar Matter Stars: Abundances Stars: Agb And post-Agb Stars: Individual (Cc Lyr)
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationJSPS KAKENHI(JP16H02168) ; JSPS KAKENHI(JP16H02168) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; JSPS KAKENHI(JP16H02168) ; JSPS KAKENHI(JP16H02168) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS)
DOI10.1093/pasj/psw125
WOS KeywordII CEPHEIDS ; CHEMICAL-COMPOSITION ; LOW-MASS ; LAMOST ; ATMOSPHERES ; TELESCOPE ; SCENARIO ; MYSTERY ; CLOUD
Indexed BySCI
Language英语
Funding OrganizationJSPS KAKENHI(JP16H02168) ; JSPS KAKENHI(JP16H02168) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; JSPS KAKENHI(JP16H02168) ; JSPS KAKENHI(JP16H02168) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS) ; NAOJ Visiting Fellow Program of the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000401118500007
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8781
Collection光学天文研究部
Affiliation1.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
2.Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
3.Univ Hyogo, Ctr Astron, 407-2 Nishigaichi,Sayo Cho, Sayo, Hyogo 6795313, Japan
4.Indian Inst Astrophys, 2 Block, Bangalore 560034, Karnataka, India
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, A20 Datun Rd, Beijing 100012, Peoples R China
6.Univ Tokyo, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Recommended Citation
GB/T 7714
Aoki, Wako,Matsuno, Tadafumi,Honda, Satoshi,et al. High-resolution spectroscopy of the extremely iron-poor post-AGB star CCLyr[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(2).
APA Aoki, Wako,Matsuno, Tadafumi,Honda, Satoshi,Parthasarathy, Mudumba,Li, Haining,&Suda, Takuma.(2017).High-resolution spectroscopy of the extremely iron-poor post-AGB star CCLyr.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,69(2).
MLA Aoki, Wako,et al."High-resolution spectroscopy of the extremely iron-poor post-AGB star CCLyr".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69.2(2017).
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