On mode changes in ZZ Ceti stars

Details On mode changes in ZZ Ceti stars On mode changes in ZZ Ceti stars

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220p..19o&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, May 15, 1986, p. 19P-22P.

Astronomy and Astrophysics

Astronomy

5

Pulse Rate, Stellar Oscillations, Variable Stars, White Dwarf Stars, Beat Frequencies, Photometry

Scientific paper

The author discusses the observations of three ZZ Ceti stars which most strongly suggest that oscillation mode changes occur in these stars on a very short time-scale. He demonstrates (1) that the reported mode change in VY Hor (= BPM 31594) is spurious; (2) that the evidence for a mode change in GD 385 is at best tentative and (3) that an alternative, plausible explanation in terms of beating is viable for BG CVn (= GD 154).

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