New Observations of the Hot PNNV Sanduleak 3

Details New Observations of the Hot PNNV Sanduleak 3 New Observations of the Hot PNNV Sanduleak 3

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..334..611s&link_type=abstract

14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present preliminary results of 108.7 hours of CCD Photometry of the Planetary Nebulae Nucleus Variable Sanduleak 3 (Sand 3). Sand 3 is a hot [WC 2-3] star with an effective temperature of about 140 000 K. Furthermore, Sand 3 is a multiperiodic g-mode pulsator with typical periods of 900 s. We observed Sand 3 in order to perform a detailed frequency analysis based on good time resolution and dual-site data. We examined the amplitude spectrum of the gathered data and extracted 14 frequencies that matched our significance criteria. Analysis of these frequencies shows evidence for radial overtones, rotational splitting and mode trapping.

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