Abstract
view Abstract Citations (48) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Can the EXOSAT Observations of DA White Dwarfs Be Explained by Layered Atmospheric Structures? Koester, D. Abstract It is demonstrated that the Exosat broadband filter observations of DA white dwarfs, which have recently been interpreted with homogeneously mixed H/He atmospheres (Jordan et al, 1987; Paerels and Heise, 1989), can be explained with stratified theoretical models. In these models a very thin H layer is floating on top of the underlying He. The transition zone is determined by diffusive equilibrium. The resulting total hydrogen-layer masses are in the range (3-500) x 10 to the -16th solar mass. Several arguments are discussed that could lead to a decision about the correct interpretation, but a final answer is not possible. Publication: The Astrophysical Journal Pub Date: July 1989 DOI: 10.1086/167657 Bibcode: 1989ApJ...342..999K Keywords: Exosat Satellite; Stellar Atmospheres; White Dwarf Stars; Gas Mixtures; Helium; Hydrogen; Satellite Observation; Stellar Composition; Astrophysics; STARS: ATMOSPHERES; STARS: WHITE DWARFS; STARS: X-RAYS full text sources ADS | data products SIMBAD (10)
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