An asteroseismic study of the Southern β Cephei star ALS 3721

C. Ulusoy, E. Niemczura, B. Ulaş, T. Gülmez

Research output: Contribution to journalArticle

Abstract

We present the results of a new investigation aimed to identify the pulsational characteristics of the Southern β Cephei star ALS 3721. Spectroscopic and multicolour photometric data were acquired at the South African Astronomical Observatory (SAAO), South Africa in 2011. Frequency analysis showed that the oscillations of ALS 3721 could be attributed to the two main frequencies with higher significance. Stellar parameters and projected rotational velocity obtained by the spectra were also used to perform photometric mode identification. In order to determine spherical harmonic degrees (l), a principal method was followed by comparing the observed light amplitude ratios in different passbands with those computed from non-adiabatic pulsation models. In general case, therefore, the spherical harmonic degrees corresponding of the frequencies were found in the expected β Cephei range.

Original languageEnglish
Pages (from-to)51-56
Number of pages6
JournalNew Astronomy
Volume22
DOIs
Publication statusPublished - Mar 11 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Astronomy and Astrophysics
  • Space and Planetary Science

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