On the pulsation modes and masses of RGB OSARGs

M. Takayama, H. Saio, Y. Ita

研究成果: Conference contribution

抄録

OSARG (OGLE Small Amplitude Red Giants) variables are RGB or AGB stars that show multi-periodic light variations with periods of about 10-100 days. Comparing linear nonadiabatic pulsation periods and period ratios with observed ones, we determined pulsation modes and masses of the RGB OSARG variables in the LMC. We found that pulsations of OSARGs involve radial 1st to 3rd overtones, p4 of l = 1, and p2 of l = 2 modes. The range of mass isfound to be 0.9-1.4M⊙ for RGB OSARGs and their mass-luminosity relation is logL/L⊙ = 0.79 M/M⊙ + 2.2.

本文言語English
ホスト出版物のタイトル40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars
ホスト出版物のサブタイトルFrom Red Giants to White Dwarfs, LIAC 2012
DOI
出版ステータスPublished - 2013
イベント40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, LIAC 2012 - Liege, Belgium
継続期間: 2012 7 92012 7 13

出版物シリーズ

名前EPJ Web of Conferences
43
ISSN(印刷版)2101-6275
ISSN(電子版)2100-014X

Other

Other40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, LIAC 2012
CountryBelgium
CityLiege
Period12/7/912/7/13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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