A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.

A comprehensive analysis of the hot helium-rich white dwarf HD 149499 B is presented based on International Ultraviolet Explorer ultraviolet spectra along with available optical spectra and photometry. Line strengths, line profiles, and continuum fluxes are analyzed in terms of a new grid of hot, high-gravity stellar atmospheres of mixed composition. The line strengths furnish the strongest temperature and gravity diagnostics because they are not affected by the contamination of the white dwarf optical spectrum and photometric properties by the K0 V companion, 2.35 arcsec away. Wegner's (1978) classification of HD 149499 B as a DO star is confirmed.

Main Author: Sion, Edward M.
Other Authors: Guinan, Edward F., Wesemael, F.
Format: Villanova Faculty Authorship
Language: English
Published: 1981
Online Access: http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:176499
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dc_source_str_mv The Astrophysical Journal 255, April 1 1982, 232-239.
author Sion, Edward M.
author_facet_str_mv Sion, Edward M.
Guinan, Edward F.
Wesemael, F.
author_or_contributor_facet_str_mv Sion, Edward M.
Guinan, Edward F.
Wesemael, F.
author_s Sion, Edward M.
spellingShingle Sion, Edward M.
A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
author-letter Sion, Edward M.
author_sort_str Sion, Edward M.
author2 Guinan, Edward F.
Wesemael, F.
author2Str Guinan, Edward F.
Wesemael, F.
dc_title_str A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
title A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
title_short A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
title_full A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
title_fullStr A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
title_full_unstemmed A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
collection_title_sort_str spectrophotometric analysis of the hot helium-rich white dwarf hd 149499 b.
title_sort spectrophotometric analysis of the hot helium-rich white dwarf hd 149499 b.
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description A comprehensive analysis of the hot helium-rich white dwarf HD 149499 B is presented based on International Ultraviolet Explorer ultraviolet spectra along with available optical spectra and photometry. Line strengths, line profiles, and continuum fluxes are analyzed in terms of a new grid of hot, high-gravity stellar atmospheres of mixed composition. The line strengths furnish the strongest temperature and gravity diagnostics because they are not affected by the contamination of the white dwarf optical spectrum and photometric properties by the K0 V companion, 2.35 arcsec away. Wegner's (1978) classification of HD 149499 B as a DO star is confirmed.
publishDate 1981
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dc.title A SPECTROPHOTOMETRIC ANALYSIS OF THE HOT HELIUM-RICH WHITE DWARF HD 149499 B.
dc.creator Sion, Edward M.
Guinan, Edward F.
Wesemael, F.
dc.description A comprehensive analysis of the hot helium-rich white dwarf HD 149499 B is presented based on International Ultraviolet Explorer ultraviolet spectra along with available optical spectra and photometry. Line strengths, line profiles, and continuum fluxes are analyzed in terms of a new grid of hot, high-gravity stellar atmospheres of mixed composition. The line strengths furnish the strongest temperature and gravity diagnostics because they are not affected by the contamination of the white dwarf optical spectrum and photometric properties by the K0 V companion, 2.35 arcsec away. Wegner's (1978) classification of HD 149499 B as a DO star is confirmed.
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