White dwarf variability with gPhoton : pulsators

Detalhes bibliográficos
Autor(a) principal: Tucker, Michael A.
Data de Publicação: 2018
Outros Autores: Fleming, S.W., Pelisoli, Ingrid Domingos, Romero, Alejandra Daniela, Bell, Keaton, Kepler, Souza Oliveira, Caton, Daniel B., Debes, John, Montgomery, Michael Houston, Thompson, S. E., Koester, Detlev, Million, Chase, Shiao, Bernie
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/179603
Resumo: We present results from a search for short time-scale white dwarf variability using gPhoton, a time-tagged data base of GALEX photon events and associated software package. We conducted a survey of 320 white dwarf stars in the McCook–Sion catalogue, inspecting each for photometric variability with particular emphasis on variability over time-scales less than∼30 min. From that survey, we present the discovery of a new pulsating white dwarf:WD 2246-069. A Ca II K line is found in archival ESO spectra and an IR excess is seen in WISE W1 and W2 bands. Its independent modes are identified in follow-up optical photometry and used to model its interior structure. Additionally, we detect UV pulsations in four previously known pulsating ZZ Ceti-type (DAVs). Included in this group is the simultaneous fitting of the pulsations of WD 1401-147 in optical, near-ultraviolet and far-ultraviolet bands using nearly concurrent Whole Earth Telescope and GALEX data, providing observational insight into the wavelength dependence of white dwarf pulsation amplitudes.
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spelling Tucker, Michael A.Fleming, S.W.Pelisoli, Ingrid DomingosRomero, Alejandra DanielaBell, KeatonKepler, Souza OliveiraCaton, Daniel B.Debes, JohnMontgomery, Michael HoustonThompson, S. E.Koester, DetlevMillion, ChaseShiao, Bernie2018-06-21T02:32:08Z20180035-8711http://hdl.handle.net/10183/179603001066845We present results from a search for short time-scale white dwarf variability using gPhoton, a time-tagged data base of GALEX photon events and associated software package. We conducted a survey of 320 white dwarf stars in the McCook–Sion catalogue, inspecting each for photometric variability with particular emphasis on variability over time-scales less than∼30 min. From that survey, we present the discovery of a new pulsating white dwarf:WD 2246-069. A Ca II K line is found in archival ESO spectra and an IR excess is seen in WISE W1 and W2 bands. Its independent modes are identified in follow-up optical photometry and used to model its interior structure. Additionally, we detect UV pulsations in four previously known pulsating ZZ Ceti-type (DAVs). Included in this group is the simultaneous fitting of the pulsations of WD 1401-147 in optical, near-ultraviolet and far-ultraviolet bands using nearly concurrent Whole Earth Telescope and GALEX data, providing observational insight into the wavelength dependence of white dwarf pulsation amplitudes.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 475, no. 4 (Apr. 2018), p. 4768-4780Anãs brancasFotometria astronômicaPulsacoes estelaresTechniques: photometricStars: oscillationsWhite dwarfsUltraviolet: starsWhite dwarf variability with gPhoton : pulsatorsEstrangeiroinfo: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:UFRGSORIGINAL001066845.pdf001066845.pdfTexto completo (inglês)application/pdf3157081http://www.lume.ufrgs.br/bitstream/10183/179603/1/001066845.pdf760dd724155fa188416dfbbc9e723468MD51TEXT001066845.pdf.txt001066845.pdf.txtExtracted Texttext/plain76056http://www.lume.ufrgs.br/bitstream/10183/179603/2/001066845.pdf.txtdc27efca40447e6e527e343083973566MD5210183/1796032023-05-14 03:24:58.47487oai:www.lume.ufrgs.br:10183/179603Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:24:58Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv White dwarf variability with gPhoton : pulsators
title White dwarf variability with gPhoton : pulsators
spellingShingle White dwarf variability with gPhoton : pulsators
Tucker, Michael A.
Anãs brancas
Fotometria astronômica
Pulsacoes estelares
Techniques: photometric
Stars: oscillations
White dwarfs
Ultraviolet: stars
title_short White dwarf variability with gPhoton : pulsators
title_full White dwarf variability with gPhoton : pulsators
title_fullStr White dwarf variability with gPhoton : pulsators
title_full_unstemmed White dwarf variability with gPhoton : pulsators
title_sort White dwarf variability with gPhoton : pulsators
author Tucker, Michael A.
author_facet Tucker, Michael A.
Fleming, S.W.
Pelisoli, Ingrid Domingos
Romero, Alejandra Daniela
Bell, Keaton
Kepler, Souza Oliveira
Caton, Daniel B.
Debes, John
Montgomery, Michael Houston
Thompson, S. E.
Koester, Detlev
Million, Chase
Shiao, Bernie
author_role author
author2 Fleming, S.W.
Pelisoli, Ingrid Domingos
Romero, Alejandra Daniela
Bell, Keaton
Kepler, Souza Oliveira
Caton, Daniel B.
Debes, John
Montgomery, Michael Houston
Thompson, S. E.
Koester, Detlev
Million, Chase
Shiao, Bernie
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Tucker, Michael A.
Fleming, S.W.
Pelisoli, Ingrid Domingos
Romero, Alejandra Daniela
Bell, Keaton
Kepler, Souza Oliveira
Caton, Daniel B.
Debes, John
Montgomery, Michael Houston
Thompson, S. E.
Koester, Detlev
Million, Chase
Shiao, Bernie
dc.subject.por.fl_str_mv Anãs brancas
Fotometria astronômica
Pulsacoes estelares
topic Anãs brancas
Fotometria astronômica
Pulsacoes estelares
Techniques: photometric
Stars: oscillations
White dwarfs
Ultraviolet: stars
dc.subject.eng.fl_str_mv Techniques: photometric
Stars: oscillations
White dwarfs
Ultraviolet: stars
description We present results from a search for short time-scale white dwarf variability using gPhoton, a time-tagged data base of GALEX photon events and associated software package. We conducted a survey of 320 white dwarf stars in the McCook–Sion catalogue, inspecting each for photometric variability with particular emphasis on variability over time-scales less than∼30 min. From that survey, we present the discovery of a new pulsating white dwarf:WD 2246-069. A Ca II K line is found in archival ESO spectra and an IR excess is seen in WISE W1 and W2 bands. Its independent modes are identified in follow-up optical photometry and used to model its interior structure. Additionally, we detect UV pulsations in four previously known pulsating ZZ Ceti-type (DAVs). Included in this group is the simultaneous fitting of the pulsations of WD 1401-147 in optical, near-ultraviolet and far-ultraviolet bands using nearly concurrent Whole Earth Telescope and GALEX data, providing observational insight into the wavelength dependence of white dwarf pulsation amplitudes.
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-06-21T02:32:08Z
dc.date.issued.fl_str_mv 2018
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/179603
dc.identifier.issn.pt_BR.fl_str_mv 0035-8711
dc.identifier.nrb.pt_BR.fl_str_mv 001066845
identifier_str_mv 0035-8711
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Monthly notices of the royal astronomical society. Oxford. Vol. 475, no. 4 (Apr. 2018), p. 4768-4780
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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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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