More frequencies of KUV 02464+3239
Zs. Bogn\'ar (1), M. Papar\'o (1), A. M\'ar (2), Gy. Kerekes (2), P., P\'apics (2), L. Moln\'ar (1,2), E. Plachy (2), N. Sztank\'o (2), E. Bokor, (2) ((1) Konkoly Observatory, Budapest, Hungary; (2) E\"otv\"os Lor\'and, University Faculty of Science, Budapest, Hungary)
TL;DR
This study presents extended observations of the pulsating white dwarf KUV 02464+3239, identifying multiple pulsation frequencies and nonlinear effects, enhancing understanding of its pulsation behavior near the red edge of the instability strip.
Contribution
The paper reports the discovery of three new pulsation frequencies and confirms harmonic and subharmonic features, providing new insights into the star's pulsation modes and nonlinear effects.
Findings
Identification of three new pulsation frequencies.
Confirmation of harmonic frequencies.
Detection of weak subharmonics indicating nonlinear pulsation effects.
Abstract
Preliminary results on KUV 02464+3239, a pulsating DA white dwarf are presented. Located near the red edge of the DAV instability strip, KUV 02464+3239 shows large amplitude and long period pulsation modes. Up to now only one mode was known from a 50-minute-long light curve. Our more extended observations allowed the identification of three additional frequencies. The presence of previously known harmonics were confirmed and weak subharmonics are also noticeable at some parts of the light curve. This suggests the dominance of nonlinear pulsation effects from time to time.
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