Pulsation in the white dwarf HE 1017−1352

Detalhes bibliográficos
Autor(a) principal: Romero, Alejandra Daniela
Data de Publicação: 2020
Outros Autores: Amaral, Larissa Antunes, Kepler, Souza Oliveira, Fraga, Luciano, Kurtz, Donald W., Shibahashi, Hiromoto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/223015
Resumo: We report the detection of periodic variations on the Teff 32 000 K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights for a total of 16.8 h. From the frequency analysis, we found four periods of 605, 556, 508, and 869 s with significant amplitudes above the 1/1000 false alarm probability detection limit. The detected modes are compatible with low harmonic degree g-mode non-radial pulsations with radial order higher than ∼9. This detection confirms the pulsation nature of HE 1017−1352 and thus the existence of the new pulsating class of hot DA white dwarf stars. In addition, we detect a long period of 1.52 h, compatible with a rotation period of DA white dwarf stars.
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spelling Romero, Alejandra DanielaAmaral, Larissa AntunesKepler, Souza OliveiraFraga, LucianoKurtz, Donald W.Shibahashi, Hiromoto2021-06-30T04:23:24Z20200035-8711http://hdl.handle.net/10183/223015001124301We report the detection of periodic variations on the Teff 32 000 K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights for a total of 16.8 h. From the frequency analysis, we found four periods of 605, 556, 508, and 869 s with significant amplitudes above the 1/1000 false alarm probability detection limit. The detected modes are compatible with low harmonic degree g-mode non-radial pulsations with radial order higher than ∼9. This detection confirms the pulsation nature of HE 1017−1352 and thus the existence of the new pulsating class of hot DA white dwarf stars. In addition, we detect a long period of 1.52 h, compatible with a rotation period of DA white dwarf stars.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 497, no. 1 (Sep. 2020), p. L24-L29Anãs brancasPulsacoes estelaresEvolucao galaticaStars: interiorsStars: variables: generalWhite dwarfsPulsation in the white dwarf HE 1017−1352Estrangeiroinfo: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:UFRGSTEXT001124301.pdf.txt001124301.pdf.txtExtracted Texttext/plain28968http://www.lume.ufrgs.br/bitstream/10183/223015/2/001124301.pdf.txtc80a3b402b17869c19c467b2473dadd3MD52ORIGINAL001124301.pdfTexto completo (inglês)application/pdf2575920http://www.lume.ufrgs.br/bitstream/10183/223015/1/001124301.pdfe844b23a4dad7d8157e48fb5541257ecMD5110183/2230152023-05-14 03:24:05.398819oai:www.lume.ufrgs.br:10183/223015Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:24:05Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Pulsation in the white dwarf HE 1017−1352
title Pulsation in the white dwarf HE 1017−1352
spellingShingle Pulsation in the white dwarf HE 1017−1352
Romero, Alejandra Daniela
Anãs brancas
Pulsacoes estelares
Evolucao galatica
Stars: interiors
Stars: variables: general
White dwarfs
title_short Pulsation in the white dwarf HE 1017−1352
title_full Pulsation in the white dwarf HE 1017−1352
title_fullStr Pulsation in the white dwarf HE 1017−1352
title_full_unstemmed Pulsation in the white dwarf HE 1017−1352
title_sort Pulsation in the white dwarf HE 1017−1352
author Romero, Alejandra Daniela
author_facet Romero, Alejandra Daniela
Amaral, Larissa Antunes
Kepler, Souza Oliveira
Fraga, Luciano
Kurtz, Donald W.
Shibahashi, Hiromoto
author_role author
author2 Amaral, Larissa Antunes
Kepler, Souza Oliveira
Fraga, Luciano
Kurtz, Donald W.
Shibahashi, Hiromoto
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Romero, Alejandra Daniela
Amaral, Larissa Antunes
Kepler, Souza Oliveira
Fraga, Luciano
Kurtz, Donald W.
Shibahashi, Hiromoto
dc.subject.por.fl_str_mv Anãs brancas
Pulsacoes estelares
Evolucao galatica
topic Anãs brancas
Pulsacoes estelares
Evolucao galatica
Stars: interiors
Stars: variables: general
White dwarfs
dc.subject.eng.fl_str_mv Stars: interiors
Stars: variables: general
White dwarfs
description We report the detection of periodic variations on the Teff 32 000 K DA white dwarf star HE 1017−1352. We obtained time series photometry using the 4.1-m Southern Astrophysical Research telescope on three separate nights for a total of 16.8 h. From the frequency analysis, we found four periods of 605, 556, 508, and 869 s with significant amplitudes above the 1/1000 false alarm probability detection limit. The detected modes are compatible with low harmonic degree g-mode non-radial pulsations with radial order higher than ∼9. This detection confirms the pulsation nature of HE 1017−1352 and thus the existence of the new pulsating class of hot DA white dwarf stars. In addition, we detect a long period of 1.52 h, compatible with a rotation period of DA white dwarf stars.
publishDate 2020
dc.date.issued.fl_str_mv 2020
dc.date.accessioned.fl_str_mv 2021-06-30T04:23:24Z
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
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/10183/223015
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 001124301
identifier_str_mv 0035-8711
001124301
url http://hdl.handle.net/10183/223015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the royal astronomical society. Oxford. Vol. 497, no. 1 (Sep. 2020), p. L24-L29
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
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
bitstream.url.fl_str_mv http://www.lume.ufrgs.br/bitstream/10183/223015/2/001124301.pdf.txt
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