Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object

Detalhes bibliográficos
Autor(a) principal: Demers, Serge
Data de Publicação: 1990
Outros Autores: Wesemael, F., Irwin, Michael John, Fontaine, Gilles, Kepler, Souza Oliveira, Lamontagne, R., Holberg, J.B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/108714
Resumo: We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that of PG 1159-035 and is consistent with the Rayleigh-Jeans tail of a very hot ('I;, 100,000 K) star. White-light, high-speed photometry reveals that this object does not exhibit periodic variations in the range 10-2000 s with semiamplitudes larger than 0.002 mag. The importance of such objects for current models of the spectral evolution of white dwarfs is emphasized.
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spelling Demers, SergeWesemael, F.Irwin, Michael JohnFontaine, GillesKepler, Souza OliveiraLamontagne, R.Holberg, J.B.2014-12-31T02:10:47Z19900004-637Xhttp://hdl.handle.net/10183/108714000015328We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that of PG 1159-035 and is consistent with the Rayleigh-Jeans tail of a very hot ('I;, 100,000 K) star. White-light, high-speed photometry reveals that this object does not exhibit periodic variations in the range 10-2000 s with semiamplitudes larger than 0.002 mag. The importance of such objects for current models of the spectral evolution of white dwarfs is emphasized.application/pdfengThe astrophysical journal. Chicago. Vol. 351, no. 1, pt. 1 (Mar. 1990), p. 271-276Anãs brancasObservações astronômicas no visívelEspectros estelaresFotometria estelarStars: individual (MCT 0130-1937)Stars: white dwarfsUltraviolet : spectraHot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 objectEstrangeiroinfo: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:UFRGSORIGINAL000015328.pdf000015328.pdfTexto completo (inglês)application/pdf319075http://www.lume.ufrgs.br/bitstream/10183/108714/1/000015328.pdf0e81cafdc595986b1eeaa12c4b4a0185MD51TEXT000015328.pdf.txt000015328.pdf.txtExtracted Texttext/plain132http://www.lume.ufrgs.br/bitstream/10183/108714/2/000015328.pdf.txt4eca573909b36ee28236cb19f5877139MD52THUMBNAIL000015328.pdf.jpg000015328.pdf.jpgGenerated Thumbnailimage/jpeg2133http://www.lume.ufrgs.br/bitstream/10183/108714/3/000015328.pdf.jpg2b061e11d05f76d58561fd2741ad1251MD5310183/1087142018-10-23 08:33:44.701oai:www.lume.ufrgs.br:10183/108714Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T11:33:44Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
title Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
spellingShingle Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
Demers, Serge
Anãs brancas
Observações astronômicas no visível
Espectros estelares
Fotometria estelar
Stars: individual (MCT 0130-1937)
Stars: white dwarfs
Ultraviolet : spectra
title_short Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
title_full Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
title_fullStr Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
title_full_unstemmed Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
title_sort Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object
author Demers, Serge
author_facet Demers, Serge
Wesemael, F.
Irwin, Michael John
Fontaine, Gilles
Kepler, Souza Oliveira
Lamontagne, R.
Holberg, J.B.
author_role author
author2 Wesemael, F.
Irwin, Michael John
Fontaine, Gilles
Kepler, Souza Oliveira
Lamontagne, R.
Holberg, J.B.
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Demers, Serge
Wesemael, F.
Irwin, Michael John
Fontaine, Gilles
Kepler, Souza Oliveira
Lamontagne, R.
Holberg, J.B.
dc.subject.por.fl_str_mv Anãs brancas
Observações astronômicas no visível
Espectros estelares
Fotometria estelar
topic Anãs brancas
Observações astronômicas no visível
Espectros estelares
Fotometria estelar
Stars: individual (MCT 0130-1937)
Stars: white dwarfs
Ultraviolet : spectra
dc.subject.eng.fl_str_mv Stars: individual (MCT 0130-1937)
Stars: white dwarfs
Ultraviolet : spectra
description We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic observations show this object to be similar to the prototype PG 1159-035 in exhibiting He u, C IV, and O VI features in its optical spectrum, as well as a rich absorption spectrum in the ultraviolet. In addition, the slope of its energy distribution appears as steep as that of PG 1159-035 and is consistent with the Rayleigh-Jeans tail of a very hot ('I;, 100,000 K) star. White-light, high-speed photometry reveals that this object does not exhibit periodic variations in the range 10-2000 s with semiamplitudes larger than 0.002 mag. The importance of such objects for current models of the spectral evolution of white dwarfs is emphasized.
publishDate 1990
dc.date.issued.fl_str_mv 1990
dc.date.accessioned.fl_str_mv 2014-12-31T02:10:47Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/108714
dc.identifier.issn.pt_BR.fl_str_mv 0004-637X
dc.identifier.nrb.pt_BR.fl_str_mv 000015328
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url http://hdl.handle.net/10183/108714
dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv The astrophysical journal. Chicago. Vol. 351, no. 1, pt. 1 (Mar. 1990), p. 271-276
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reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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