White dwarf variability with gPhoton : pulsators
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , , , , , |
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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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 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/10183/179603 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001066845 |
identifier_str_mv |
0035-8711 001066845 |
url |
http://hdl.handle.net/10183/179603 |
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. 475, no. 4 (Apr. 2018), p. 4768-4780 |
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 |
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UFRGS |
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Repositório Institucional da UFRGS |
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Repositório Institucional da UFRGS |
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http://www.lume.ufrgs.br/bitstream/10183/179603/1/001066845.pdf http://www.lume.ufrgs.br/bitstream/10183/179603/2/001066845.pdf.txt |
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Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
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