The discovery of a new DAV star using IUE temperature determination

Details The discovery of a new DAV star using IUE temperature determination The discovery of a new DAV star using IUE temperature determination

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390l..89k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. L89-L91. Research supported by CNPq

Other

50

Stellar Oscillations, Stellar Temperature, Variable Stars, White Dwarf Stars, Fourier Transformation, Iue, Light Curve, Temperature Measurement

Scientific paper

Observations of an unreported ZZ Ceti object designated as BPM 37093 are examined to determine whether the star is a pulsator. The photometric observations are conducted with two instruments, and the data are reduced by interpolation sky subtraction and extinction corrected by parabola fitting for IUE temperature determinations. BPM 37093 is shown to be a real pulsator and to have a 4-mmag amplitude and a 600-s period. The low amplitude of the pulsations can be explained by low-amplitude pulsations on the stellar surface and/or the geometrical orientation of the object during the observations. The low amplitude of the pulsations from the object suggests that other stars considered to be nonvariable may be pulsating at amplitudes below 5 mmag.

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