Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.291..465r&link_type=abstract
Astrophysics and Space Science, v. 291, Issue 3, p. 465-471 (2004).
Astronomy and Astrophysics
Astrophysics
4
Subdwarfs, Pulsations
Scientific paper
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.
Cordes Oliver
Crause Lisa
Fontaine Gilles
For Bi-Qing
Green Elizabeth
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