The photospheric temperatures and composition of very hot He-rich white dwarfs

Details The photospheric temperatures and composition of very hot He-rich white dwarfs The photospheric temperatures and composition of very hot He-rich white dwarfs

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245..370b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 245, July 15, 1990, p. 370-383.

Astronomy and Astrophysics

Astronomy

8

B Stars, Hot Stars, Stellar Spectra, Stellar Temperature, White Dwarf Stars, Exosat Satellite, Helium, Planetary Nebulae, Stellar Atmospheres, Stellar Evolution

Scientific paper

Results 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.

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