The ZZ Ceti red edge

Detalhes bibliográficos
Autor(a) principal: Kanaan Neto, Antonio Nemer
Data de Publicação: 2002
Outros Autores: Kepler, Souza Oliveira, Winget, Donald Earl
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/98517
Resumo: With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time-series photoelectric photometry, not di erential photometry, insensitive for small amplitude periodicities of 15 min and longer. In our survey we constantly monitor the sky brightness as well as one or more comparison stars through the same color lter, reducing the adverse e ects of di erential extinction and sky fluctuations, obtaining true di erential photometry.
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spelling Kanaan Neto, Antonio NemerKepler, Souza OliveiraWinget, Donald Earl2014-07-24T02:04:24Z20020004-6361http://hdl.handle.net/10183/98517000327197With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time-series photoelectric photometry, not di erential photometry, insensitive for small amplitude periodicities of 15 min and longer. In our survey we constantly monitor the sky brightness as well as one or more comparison stars through the same color lter, reducing the adverse e ects of di erential extinction and sky fluctuations, obtaining true di erential photometry.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 389, no. 3 (July 2002), p. 896-903Fotometria estelarEstrelas variaveisAnãs brancasStars: oscillationsStars: white dwarfsThe ZZ Ceti red edgeEstrangeiroinfo: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:UFRGSORIGINAL000327197.pdf000327197.pdfTexto completo (inglês)application/pdf332994http://www.lume.ufrgs.br/bitstream/10183/98517/1/000327197.pdf22f9864f41b239da4b1786afe613f217MD51TEXT000327197.pdf.txt000327197.pdf.txtExtracted Texttext/plain30935http://www.lume.ufrgs.br/bitstream/10183/98517/2/000327197.pdf.txt69c2673b4881c283a7f11075cea3f11cMD52THUMBNAIL000327197.pdf.jpg000327197.pdf.jpgGenerated Thumbnailimage/jpeg2046http://www.lume.ufrgs.br/bitstream/10183/98517/3/000327197.pdf.jpgeac77a3816e2cf16cad6557a7dae5f77MD5310183/985172018-10-19 10:42:00.501oai:www.lume.ufrgs.br:10183/98517Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-19T13:42Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv The ZZ Ceti red edge
title The ZZ Ceti red edge
spellingShingle The ZZ Ceti red edge
Kanaan Neto, Antonio Nemer
Fotometria estelar
Estrelas variaveis
Anãs brancas
Stars: oscillations
Stars: white dwarfs
title_short The ZZ Ceti red edge
title_full The ZZ Ceti red edge
title_fullStr The ZZ Ceti red edge
title_full_unstemmed The ZZ Ceti red edge
title_sort The ZZ Ceti red edge
author Kanaan Neto, Antonio Nemer
author_facet Kanaan Neto, Antonio Nemer
Kepler, Souza Oliveira
Winget, Donald Earl
author_role author
author2 Kepler, Souza Oliveira
Winget, Donald Earl
author2_role author
author
dc.contributor.author.fl_str_mv Kanaan Neto, Antonio Nemer
Kepler, Souza Oliveira
Winget, Donald Earl
dc.subject.por.fl_str_mv Fotometria estelar
Estrelas variaveis
Anãs brancas
topic Fotometria estelar
Estrelas variaveis
Anãs brancas
Stars: oscillations
Stars: white dwarfs
dc.subject.eng.fl_str_mv Stars: oscillations
Stars: white dwarfs
description With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time-series photoelectric photometry, not di erential photometry, insensitive for small amplitude periodicities of 15 min and longer. In our survey we constantly monitor the sky brightness as well as one or more comparison stars through the same color lter, reducing the adverse e ects of di erential extinction and sky fluctuations, obtaining true di erential photometry.
publishDate 2002
dc.date.issued.fl_str_mv 2002
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/98517
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Astronomy and astrophysics. Les Ulis. Vol. 389, no. 3 (July 2002), p. 896-903
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