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

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 achiev...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2011-08, Vol.415 (2), p.1322-1333
Main Authors: Pakštienė, E., Solheim, J.-E., Handler, G., Reed, M., Bognár, Zs, Rodler, F., Paparó, M., Zdanavičius, J., Steininger, B., Wolf, G.
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Stars & galaxies
stars: individual: PG 2303+243
stars: variables: general
white dwarfs
Citations: Items that cite this one
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Summary: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 16.5 h.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2011.18781.x