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Preprint 11h/04

Investigation of the Spectral Variability of PG 1159-035

S. Dreizler (1), K. Werner (2), and T. Stahn (1)

1 Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
2 Institut für Astronomie und Astrophysik, Sand 1, 72076 Tübingen, Germany

To be published in: 14th European Workshop on White Dwarfs, eds. D. Koester, S. Moehler, ASP Conf. Ser.

Abstract. Based on HST-STIS spectra of PG1159-035, a hot, variable white dwarf, we investigate the response of the stellar atmosphere to pulsations. The observations are compared to theoretical model atmospheres which allows to derive an amplitude for the variation of the effective temperature of about 1250 K. Additionally, we derive amplitudes for radial velocity variations with 4.5 km/s for the second strongest optical mode.

Preprint (268 kb PDF file including figures)

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