On the pulsation modes and masses of RGB OSARGs

M. Takayama, H. Saio, Y. Ita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars
Subtitle of host publicationFrom Red Giants to White Dwarfs, LIAC 2012
DOIs
Publication statusPublished - 2013
Event40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, LIAC 2012 - Liege, Belgium
Duration: 2012 Jul 92012 Jul 13

Publication series

NameEPJ Web of Conferences
Volume43
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Other

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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