Recent developments in the study of long-period variable subdwarf B stars

Suzanna K. Randall, Gilles Fontaine, Elizabeth M. Green, Pierre Brassard, Donald M. Terndrup

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We report on recent advances in the study of long-period variable subdwarf B stars. Two such objects, PG 1627+017 and PG 1338+481, were the targets of extensive multi-site campaigns conducted in 2003 and 2004 respectively. The photometry accumulated yielded up to 23 periodicities in the 4500-9000 s range for the former star and at least 4 convincing periods between 3500 and 4500 s for the latter. The band of periods observed is in qualititive agreement with theoretical predictions for both targets. In the case of PG 1338+481, we obtained multi-colour photometry of sufficient quality to constrain the observed modes' degree indices. Preliminary analysis suggests l=4 for all four modes, again in accordance with theory.

Original languageEnglish (US)
Pages (from-to)119-124
Number of pages6
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number559
StatePublished - 2004
EventSOHO 14/GONG 2004 Workshop - Helio- and Asteroseismology: Towards a Golden Future - New Haven, CT, United States
Duration: Jul 12 2004Jul 16 2004


  • Stars:oscillations
  • Subdwarfs

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science


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