A multi-site campaign on the long period variable subdwarf B star PG 1627+017

Suzanna Randall, Gilles Fontaine, Elizabeth Green, Dave Kilkenny, Lisa Crause, Oliver Cordes, Simon O'Toole, Lázló Kiss, Bi Qing For, Pierre Olivier Quirion

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We report on the outcome of the first major multi-site campaign on a long-period variable subdwarf B star. The target PG 1627+017 was observed for a total of 334 h during April/May/June 2003 from the lynchpin observatory at Mt. Bigelow, Arizona, with important contributions coming from co-observations at SAAO, Calar Alto and Siding Spring. Preliminary analysis indicates the presence of 8-10 probable periods in the range ∼4500 to ∼8900 s with relative amplitudes between 0.1 and 0.5%;. The range over which the periods are found is in qualitative agreement with theoretical predictions and the number of periods found shows potential for an in-depth asteroseismological analysis. Multi-colour observations show that the relative amplitudes of pulsation are larger in the U-band than in the R, which again is in agreement with theory. However, more multi-colour observations are needed to be able to make statements at the quantitative level.

Original languageEnglish (US)
Pages (from-to)465-471
Number of pages7
JournalAstrophysics and Space Science
Issue number3-4
StatePublished - 2004


  • pulsations
  • subdwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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