The cool ZZ Ceti star PG 2303+243: Observations and analysis of variability in 2004

E. Pakštiene, J. E. Solheim, G. Handler, M. Reed, Zs Bognár, F. Rodler, M. Paparó, J. Zdanavičius, B. Steininger, G. Wolf

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Abstract

PG 2303+243 is a cool DA variable (also called ZZ Ceti) star with a rich pulsation spectrum and variable amplitudes. A mini-campaign involving six observatories yielded time-resolved photometric measurements of PG 2303+243 during the period 2004 September 5-20. A duty cycle of 35 per cent was achieved. We detected 24 possible independent frequencies, their amplitudes and phases for future mode identification. We confirm the occurrence of short-term amplitude and frequency variations. Our analysis suggests an l= 1 rotational splitting around 8.4 μHz, implying a rotation period of 16.5h.

Original languageEnglish
Pages (from-to)1322-1333
Number of pages12
JournalMonthly Notices of the Royal Astronomical Society
Volume415
Issue number2
DOIs
Publication statusPublished - Aug 1 2011

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Keywords

  • Stars: individual: PG 2303+243
  • Stars: variables: general
  • White dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Pakštiene, E., Solheim, J. E., Handler, G., Reed, M., Bognár, Z., Rodler, F., Paparó, M., Zdanavičius, J., Steininger, B., & Wolf, G. (2011). The cool ZZ Ceti star PG 2303+243: Observations and analysis of variability in 2004. Monthly Notices of the Royal Astronomical Society, 415(2), 1322-1333. https://doi.org/10.1111/j.1365-2966.2011.18781.x