New pulsating db white dwarf stars from the Sloan Digital Sky Survey

Detalhes bibliográficos
Autor(a) principal: Nitta, Atsuko
Data de Publicação: 2009
Outros Autores: Kleinman, Scot James, Krzesinski, Jerzy, Kepler, Souza Oliveira, Metcalfe, Travis S., Mukadam, Anjum Shagufta, Mullally, Fergal, Nather, R. Edward, Sullivan, Denis J., Thompson, S. E., Winget, Donald Earl
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/108978
Resumo: We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities, a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators’ light curves and power spectra.
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spelling Nitta, AtsukoKleinman, Scot JamesKrzesinski, JerzyKepler, Souza OliveiraMetcalfe, Travis S.Mukadam, Anjum ShaguftaMullally, FergalNather, R. EdwardSullivan, Denis J.Thompson, S. E.Winget, Donald Earl2015-01-15T02:15:12Z20090004-637Xhttp://hdl.handle.net/10183/108978000766122We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities, a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators’ light curves and power spectra.application/pdfengThe astrophysical journal. Bristol. Vol. 690, no. 1 (Jan. 2009), p. 560-565Pulsacoes estelaresEspectros estelaresEstrelas variaveisAnãs brancasStars: generalStars: oscillationsStars: variables: otherWhite dwarfsNew pulsating db white dwarf stars from the Sloan Digital Sky SurveyEstrangeiroinfo: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:UFRGSORIGINAL000766122.pdf000766122.pdfTexto completo (inglês)application/pdf396991http://www.lume.ufrgs.br/bitstream/10183/108978/1/000766122.pdf66cd6c93e1963b7e2fad7fd84c468064MD51TEXT000766122.pdf.txt000766122.pdf.txtExtracted Texttext/plain31076http://www.lume.ufrgs.br/bitstream/10183/108978/2/000766122.pdf.txt142144646b8716fdda9790c1f120eaebMD52THUMBNAIL000766122.pdf.jpg000766122.pdf.jpgGenerated Thumbnailimage/jpeg2217http://www.lume.ufrgs.br/bitstream/10183/108978/3/000766122.pdf.jpgec0ad3fadd50da9ea4e20f3cc51c3cacMD5310183/1089782021-07-09 04:37:52.7537oai:www.lume.ufrgs.br:10183/108978Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-07-09T07:37:52Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv New pulsating db white dwarf stars from the Sloan Digital Sky Survey
title New pulsating db white dwarf stars from the Sloan Digital Sky Survey
spellingShingle New pulsating db white dwarf stars from the Sloan Digital Sky Survey
Nitta, Atsuko
Pulsacoes estelares
Espectros estelares
Estrelas variaveis
Anãs brancas
Stars: general
Stars: oscillations
Stars: variables: other
White dwarfs
title_short New pulsating db white dwarf stars from the Sloan Digital Sky Survey
title_full New pulsating db white dwarf stars from the Sloan Digital Sky Survey
title_fullStr New pulsating db white dwarf stars from the Sloan Digital Sky Survey
title_full_unstemmed New pulsating db white dwarf stars from the Sloan Digital Sky Survey
title_sort New pulsating db white dwarf stars from the Sloan Digital Sky Survey
author Nitta, Atsuko
author_facet Nitta, Atsuko
Kleinman, Scot James
Krzesinski, Jerzy
Kepler, Souza Oliveira
Metcalfe, Travis S.
Mukadam, Anjum Shagufta
Mullally, Fergal
Nather, R. Edward
Sullivan, Denis J.
Thompson, S. E.
Winget, Donald Earl
author_role author
author2 Kleinman, Scot James
Krzesinski, Jerzy
Kepler, Souza Oliveira
Metcalfe, Travis S.
Mukadam, Anjum Shagufta
Mullally, Fergal
Nather, R. Edward
Sullivan, Denis J.
Thompson, S. E.
Winget, Donald Earl
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Nitta, Atsuko
Kleinman, Scot James
Krzesinski, Jerzy
Kepler, Souza Oliveira
Metcalfe, Travis S.
Mukadam, Anjum Shagufta
Mullally, Fergal
Nather, R. Edward
Sullivan, Denis J.
Thompson, S. E.
Winget, Donald Earl
dc.subject.por.fl_str_mv Pulsacoes estelares
Espectros estelares
Estrelas variaveis
Anãs brancas
topic Pulsacoes estelares
Espectros estelares
Estrelas variaveis
Anãs brancas
Stars: general
Stars: oscillations
Stars: variables: other
White dwarfs
dc.subject.eng.fl_str_mv Stars: general
Stars: oscillations
Stars: variables: other
White dwarfs
description We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities, a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators’ light curves and power spectra.
publishDate 2009
dc.date.issued.fl_str_mv 2009
dc.date.accessioned.fl_str_mv 2015-01-15T02:15:12Z
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/10183/108978
dc.identifier.issn.pt_BR.fl_str_mv 0004-637X
dc.identifier.nrb.pt_BR.fl_str_mv 000766122
identifier_str_mv 0004-637X
000766122
url http://hdl.handle.net/10183/108978
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv The astrophysical journal. Bristol. Vol. 690, no. 1 (Jan. 2009), p. 560-565
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
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