CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes
Astrophysics
2009-11-06 v1
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.
Keywords
Cite
@article{arxiv.astro-ph/0102142,
title = {CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes},
author = {A. Ulla and M. R. Zapatero Osorio and F. Perez Hernandez and J. MacDonald},
journal= {arXiv preprint arXiv:astro-ph/0102142},
year = {2009}
}
Comments
Accepted for publication in A&A. Seven pages, four figures included