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The photospheric temperatures and composition of very hot He-rich white dwarfsResults are reported from a detailed analysis of Exosat observations of six hot He-rich white dwarfs belonging to, or related to, the spectroscopic subclass of PG1159 stars. These objects are thought to evolve directly from O VI type planetary nebulae nuclei and provide an important link in models of white dwarf evolution. When the Exosat data are compared with the predictions of an extensive grid of He-rich model atmospheres, it is possible to obtain temperature estimates for these stars that are much better constrained than previous attempts.
Document ID
19900056589
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Barstow, M. A.
(Leicester, University United Kingdom)
Holberg, J. B.
(Arizona, University Tucson, United States)
Date Acquired
August 14, 2013
Publication Date
July 15, 1990
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 245
ISSN: 0035-8711
Subject Category
Astrophysics
Accession Number
90A43644
Funding Number(s)
CONTRACT_GRANT: NAG8-565
Distribution Limits
Public
Copyright
Other

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