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Preprint 11d/04

Spectral Analyses of DO White Dwarfs and PG1159 stars from the Sloan Digital Sky Survey

S.D. Hügelmeyer (1), S. Dreizler (1), K. Werner (2), A. Nitta (3), S.J. Kleinman (3) and J. Krzesinski (3)

(1) Institut für Astrophysik, Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
(2) Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany
(3) New Mexico State University, Apache Point Observatory, 2001 Apache Point Road, P.O. Box 59, Sunspot, NM 88349, USA

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

Abstract. SDSS (DR1 and DR2) has recently proposed 7 new DO white dwarfs as well as 6 new PG1159 stars. This is a significant increase in the known number of DOs and PG1159 stars. Our spectral analyses will provide stellar parameters which can then be used to derive constraints for the evolution of H-deficient white dwarfs. A comprehensive understanding of these objects is still severely hampered by low-number statistics.

Preprint (585 kb PDF file including figures)

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