CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes

Authors
Ulla, A Osorio, MRZ Hernandez, FP MacDonald, J
Citation
A. Ulla et al., CCD-based observations of PG 0856+121 and a theoretical analysis of its oscillation modes, ASTRON ASTR, 369(3), 2001, pp. 986-992
Citations number
36
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
369
Issue
3
Year of publication
2001
Pages
986 - 992
Database
ISI
SICI code
0004-6361(200104)369:3<986:COOP0A>2.0.ZU;2-2
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, re d, point-like sources are resolved. They account for the previously reporte d IR excess observed in this hot subdwarf. In addition, the new unfiltered differential photometry of PG 0856+121 confirms its previously reported pul sational nature. A comparison with the oscillation modes of stellar models suggests the presence of g modes.