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Two new hot white dwarfs in a region of exceptionally low hi densityWe report the discovery of two hot white dwarfs which have the lowest line-of-sight neutral hydrogen column densities yet measured. The stars were found independently by the ROSAT EUV, Montreal-Cambridge-Tololo, and Edinburgh-Cape surveys. Follow-up observations made using the Voyager 2 ultraviolet spectrometer reveal strong continua shortward of the 912A Lyman limit from which we deduce that the neutral hydrogen column densities are 1.3 x 10(exp 17) and 2.0 x 10(exp 17) atoms/sq cm.
Document ID
19950049942
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Barstow, M. A.
(Univ. of Leicester Leicester, UK, United States)
Wesemael, F.
(Univ. de Montreal Montreal, Canada)
Holberg, J. B.
(Univ. of Arizona, Tucson, AZ US, United States)
Werner, K.
(Univ. of Kiel Kiel, Germany)
Buckley, D. A. H.
(Univ. of Cape Town Cape Town, South Africa)
Stobie, R. S.
(Univ. of Cape Town Cape Town, South Africa)
Fontaine, G.
(Univ. de Montreal Montreal, Canada)
Rosen, S. R.
(Univ. of Leicester Leicester, UK, United States)
Demers, S.
(Univ. de Montreal Montreal, Canada)
Lamontagne, R.
(Univ. de Montreal Montreal, Canada)
Date Acquired
August 16, 2013
Publication Date
December 1, 1993
Publication Information
Publication: Advances in Space Research
Volume: 13
Issue: 12
ISSN: 0273-1177
Subject Category
Astronomy
Accession Number
95A81541
Distribution Limits
Public
Copyright
Other

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