Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.272l..21s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 272, Issue 3, pp. L21-L24.
Astronomy and Astrophysics
Astronomy
16
Stars, Individual, Ec14012-1446-Stars, Oscillations-White Dwarfs.
Scientific paper
The discovery of another large-amplitude ZZ Ceti star in the Edinburgh-Cape Blue Object Survey is announced. The light curve is non-sinusoidal, with a peak-to-peak variation ranging from 0.08 to 0.30 mag in white light. Frequency analysis of four nights of high-speed photometry reveals a similar frequency structure, with power at 1.382, 1.639, 1.885 and 2.507 mHz present on every night. There is evidence that the power at these frequencies is not constant, indicating the presence of multiple close frequencies. The frequency pattern fits that of other ZZ Ceti stars, supporting the evidence for a small range in total mass and hydrogen layer mass in pulsating DA white dwarfs. Possible mode identifications for this star, and for a previously announced pulsating DA white dwarf, are given.
Ashley Richard
Chen Aiqing
Kilkenny Dave
Koen Chris
O'Donoghue Darragh
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