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The discontinuity near 1600 A in the spectra of DA white dwarfsUltraviolet spectroscopic observations of two relatively cool DA white dwarfs, L481 - 60 (= WD 1544 - 37) and BPM 1266 ( = WD 2105 - 82), with the International Ultraviolet Explorer (IUE) satellite show a strong drop in their spectral energy distributions below 1600 A. Published model atmospheres and thier visual spectra suggest that these two stars have effective temperatures in the vicinity of 9,000-10,000 K, and it is proposed that the 1600 A feature could be due to the 342(1S) 3s2(1S) photoionization edge of Mg I.
Document ID
19850030124
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wegner, G.
(Dartmouth College Hanover, NH, United States)
Date Acquired
August 12, 2013
Publication Date
September 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 284
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A12275
Funding Number(s)
CONTRACT_GRANT: NAG5-287
CONTRACT_GRANT: NSF AST-82-19474
Distribution Limits
Public
Copyright
Other

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