CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes
arXiv:astro-ph/0102142 · doi:10.1051/0004-6361:20010181
Abstract
BVRI CCD-based and near-IR (J) imaging, together with unfiltered photometry of the hot subdwarf B star PG 0856+121 are reported. Two close, faint, red, point-like sources are resolved. They account for the previously reported IR excess observed in this hot subdwarf. In addition, the new unfiltered differential photometry of PG 0856+121 confirms its previously reported pulsational nature. A comparison with the oscillation modes of stellar models suggests the possible presence of g modes.
Accepted for publication in A&A. Seven pages, four figures included