A new hot DA white dwarf in a region of exceptionally low HI density

Detalhes bibliográficos
Autor(a) principal: Barstow, Martin A.
Data de Publicação: 1994
Outros Autores: Wesemael, F., Holberg, J.B., Buckley, David A.H., Stobie, Robert S., Mittaz, J.P.D., Fontaine, Gilles, Rosen, Simon R., Demers, Serge, Lamontagne, R., Irwin, Michael John, Bergeron, Pierre, Kepler, Souza Oliveira, Vennes, S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/88728
Resumo: We report the discovery of the hot DA white dwarf RE 0457- 281 which has the lowest line-of-sight neutral hydrogen column density yet measured. The star was found independently by the ROSAT EUV, Montreal-Cambridge-Tololo and Edinburgh-Cape surveys. With an effective temperature of 60 700 K and very soft EUV spectrum, this white dwarf resembles the well-studied hot DA white dwarf G 191- B2B. A follow-up observation made using the Voyager 2 UV spectrometer reveals a strong continuum shortward of the 912-Å Lyman limit from which we deduce that the neutral hydrogen column density is 1.3 x 1O 17 atom cm-².
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spelling Barstow, Martin A.Wesemael, F.Holberg, J.B.Buckley, David A.H.Stobie, Robert S.Mittaz, J.P.D.Fontaine, GillesRosen, Simon R.Demers, SergeLamontagne, R.Irwin, Michael JohnBergeron, PierreKepler, Souza OliveiraVennes, S.2014-03-21T01:48:49Z19940035-8711http://hdl.handle.net/10183/88728000220166We report the discovery of the hot DA white dwarf RE 0457- 281 which has the lowest line-of-sight neutral hydrogen column density yet measured. The star was found independently by the ROSAT EUV, Montreal-Cambridge-Tololo and Edinburgh-Cape surveys. With an effective temperature of 60 700 K and very soft EUV spectrum, this white dwarf resembles the well-studied hot DA white dwarf G 191- B2B. A follow-up observation made using the Voyager 2 UV spectrometer reveals a strong continuum shortward of the 912-Å Lyman limit from which we deduce that the neutral hydrogen column density is 1.3 x 1O 17 atom cm-².application/pdfengMonthly Notices of the Royal Astronomical Society. London. Vol. 267, no. 3 (Apr. 1994), p. 647-652Astrofisica estelarAstrofísicaAbundanciaAnãs brancasStars: atmospheresStars: individual: RE 0457- 281White dwarfsISM: abundancesUltraviolet: starsA new hot DA white dwarf in a region of exceptionally low HI densityEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000220166.pdf000220166.pdfTexto completo (inglês)application/pdf203584http://www.lume.ufrgs.br/bitstream/10183/88728/1/000220166.pdf5cf8088375dd37188ef333a4e2b83a24MD51TEXT000220166.pdf.txt000220166.pdf.txtExtracted Texttext/plain132http://www.lume.ufrgs.br/bitstream/10183/88728/2/000220166.pdf.txta9ecc051f1094f48cb3696d91f093ff8MD52THUMBNAIL000220166.pdf.jpg000220166.pdf.jpgGenerated Thumbnailimage/jpeg1970http://www.lume.ufrgs.br/bitstream/10183/88728/3/000220166.pdf.jpg7b9c1c42f5d9b2be0754e61f503b85caMD5310183/887282022-02-22 05:11:34.363397oai:www.lume.ufrgs.br:10183/88728Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-02-22T08:11:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv A new hot DA white dwarf in a region of exceptionally low HI density
title A new hot DA white dwarf in a region of exceptionally low HI density
spellingShingle A new hot DA white dwarf in a region of exceptionally low HI density
Barstow, Martin A.
Astrofisica estelar
Astrofísica
Abundancia
Anãs brancas
Stars: atmospheres
Stars: individual: RE 0457- 281
White dwarfs
ISM: abundances
Ultraviolet: stars
title_short A new hot DA white dwarf in a region of exceptionally low HI density
title_full A new hot DA white dwarf in a region of exceptionally low HI density
title_fullStr A new hot DA white dwarf in a region of exceptionally low HI density
title_full_unstemmed A new hot DA white dwarf in a region of exceptionally low HI density
title_sort A new hot DA white dwarf in a region of exceptionally low HI density
author Barstow, Martin A.
author_facet Barstow, Martin A.
Wesemael, F.
Holberg, J.B.
Buckley, David A.H.
Stobie, Robert S.
Mittaz, J.P.D.
Fontaine, Gilles
Rosen, Simon R.
Demers, Serge
Lamontagne, R.
Irwin, Michael John
Bergeron, Pierre
Kepler, Souza Oliveira
Vennes, S.
author_role author
author2 Wesemael, F.
Holberg, J.B.
Buckley, David A.H.
Stobie, Robert S.
Mittaz, J.P.D.
Fontaine, Gilles
Rosen, Simon R.
Demers, Serge
Lamontagne, R.
Irwin, Michael John
Bergeron, Pierre
Kepler, Souza Oliveira
Vennes, S.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Barstow, Martin A.
Wesemael, F.
Holberg, J.B.
Buckley, David A.H.
Stobie, Robert S.
Mittaz, J.P.D.
Fontaine, Gilles
Rosen, Simon R.
Demers, Serge
Lamontagne, R.
Irwin, Michael John
Bergeron, Pierre
Kepler, Souza Oliveira
Vennes, S.
dc.subject.por.fl_str_mv Astrofisica estelar
Astrofísica
Abundancia
Anãs brancas
topic Astrofisica estelar
Astrofísica
Abundancia
Anãs brancas
Stars: atmospheres
Stars: individual: RE 0457- 281
White dwarfs
ISM: abundances
Ultraviolet: stars
dc.subject.eng.fl_str_mv Stars: atmospheres
Stars: individual: RE 0457- 281
White dwarfs
ISM: abundances
Ultraviolet: stars
description We report the discovery of the hot DA white dwarf RE 0457- 281 which has the lowest line-of-sight neutral hydrogen column density yet measured. The star was found independently by the ROSAT EUV, Montreal-Cambridge-Tololo and Edinburgh-Cape surveys. With an effective temperature of 60 700 K and very soft EUV spectrum, this white dwarf resembles the well-studied hot DA white dwarf G 191- B2B. A follow-up observation made using the Voyager 2 UV spectrometer reveals a strong continuum shortward of the 912-Å Lyman limit from which we deduce that the neutral hydrogen column density is 1.3 x 1O 17 atom cm-².
publishDate 1994
dc.date.issued.fl_str_mv 1994
dc.date.accessioned.fl_str_mv 2014-03-21T01:48:49Z
dc.type.driver.fl_str_mv Estrangeiro
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dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/88728
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 000220166
identifier_str_mv 0035-8711
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url http://hdl.handle.net/10183/88728
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Monthly Notices of the Royal Astronomical Society. London. Vol. 267, no. 3 (Apr. 1994), p. 647-652
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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instname:Universidade Federal do Rio Grande do Sul (UFRGS)
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instname_str Universidade Federal do Rio Grande do Sul (UFRGS)
instacron_str UFRGS
institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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