Observational limits on companions to g29-38
Autor(a) principal: | |
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Data de Publicação: | 1994 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108840 |
Resumo: | Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain. |
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Kleinman, Scot JamesNather, R. EdwardWinget, Donald EarlClemens, J. ChristopherBradley, Paul A.Kanaan Neto, Antonio NemerProvencal, Judith L.Claver, C.F.Watson, Todd K.Yanagida, K.Dixson, James S.Wood, Matthew A.Sullivan, Denis J.Meistas, Edmundas G.Leibowitz, Elia M.Moskalik, PawelZola, StaszekPajdosz, Y.Krzesinski, JerzySolheim, Jan-EricBruvold, A.O'Donoghue, DarraghKatz, M.Vauclair, GérardDolez, NoëlChevreton, MichelBarstow, Martin A.Kepler, Souza OliveiraGiovannini Junior, OdilonHansen, Carl J.Kawaler, Steven D.2015-01-08T02:13:08Z19940004-637Xhttp://hdl.handle.net/10183/108840000256311Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.application/pdfengThe Astrophysical Journal. Chicago. Vol. 436, no. 2, pt. 1 (Dec. 1994), p. 875-884Estrelas binariasFotometria estelarAnãs brancasEstrelas variaveisBinaries: generalStars: individual (G29-38)Stars: low-mass, brown dwarfsStars: oscillationsWhite dwarfsObservational limits on companions to g29-38Estrangeiroinfo: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:UFRGSORIGINAL000256311.pdf000256311.pdfTexto completo (inglês)application/pdf246185http://www.lume.ufrgs.br/bitstream/10183/108840/1/000256311.pdfe4b26de0b0b1074ff3549af58e1bdbbcMD51TEXT000256311.pdf.txt000256311.pdf.txtExtracted Texttext/plain220http://www.lume.ufrgs.br/bitstream/10183/108840/2/000256311.pdf.txt4d6784b9743eda651e999877641448a5MD52THUMBNAIL000256311.pdf.jpg000256311.pdf.jpgGenerated Thumbnailimage/jpeg2195http://www.lume.ufrgs.br/bitstream/10183/108840/3/000256311.pdf.jpg54a88361562eeaeab783a8616a4e6952MD5310183/1088402018-10-23 08:34:31.908oai:www.lume.ufrgs.br:10183/108840Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T11:34:31Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Observational limits on companions to g29-38 |
title |
Observational limits on companions to g29-38 |
spellingShingle |
Observational limits on companions to g29-38 Kleinman, Scot James Estrelas binarias Fotometria estelar Anãs brancas Estrelas variaveis Binaries: general Stars: individual (G29-38) Stars: low-mass, brown dwarfs Stars: oscillations White dwarfs |
title_short |
Observational limits on companions to g29-38 |
title_full |
Observational limits on companions to g29-38 |
title_fullStr |
Observational limits on companions to g29-38 |
title_full_unstemmed |
Observational limits on companions to g29-38 |
title_sort |
Observational limits on companions to g29-38 |
author |
Kleinman, Scot James |
author_facet |
Kleinman, Scot James Nather, R. Edward Winget, Donald Earl Clemens, J. Christopher Bradley, Paul A. Kanaan Neto, Antonio Nemer Provencal, Judith L. Claver, C.F. Watson, Todd K. Yanagida, K. Dixson, James S. Wood, Matthew A. Sullivan, Denis J. Meistas, Edmundas G. Leibowitz, Elia M. Moskalik, Pawel Zola, Staszek Pajdosz, Y. Krzesinski, Jerzy Solheim, Jan-Eric Bruvold, A. O'Donoghue, Darragh Katz, M. Vauclair, Gérard Dolez, Noël Chevreton, Michel Barstow, Martin A. Kepler, Souza Oliveira Giovannini Junior, Odilon Hansen, Carl J. Kawaler, Steven D. |
author_role |
author |
author2 |
Nather, R. Edward Winget, Donald Earl Clemens, J. Christopher Bradley, Paul A. Kanaan Neto, Antonio Nemer Provencal, Judith L. Claver, C.F. Watson, Todd K. Yanagida, K. Dixson, James S. Wood, Matthew A. Sullivan, Denis J. Meistas, Edmundas G. Leibowitz, Elia M. Moskalik, Pawel Zola, Staszek Pajdosz, Y. Krzesinski, Jerzy Solheim, Jan-Eric Bruvold, A. O'Donoghue, Darragh Katz, M. Vauclair, Gérard Dolez, Noël Chevreton, Michel Barstow, Martin A. Kepler, Souza Oliveira Giovannini Junior, Odilon Hansen, Carl J. Kawaler, Steven D. |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Kleinman, Scot James Nather, R. Edward Winget, Donald Earl Clemens, J. Christopher Bradley, Paul A. Kanaan Neto, Antonio Nemer Provencal, Judith L. Claver, C.F. Watson, Todd K. Yanagida, K. Dixson, James S. Wood, Matthew A. Sullivan, Denis J. Meistas, Edmundas G. Leibowitz, Elia M. Moskalik, Pawel Zola, Staszek Pajdosz, Y. Krzesinski, Jerzy Solheim, Jan-Eric Bruvold, A. O'Donoghue, Darragh Katz, M. Vauclair, Gérard Dolez, Noël Chevreton, Michel Barstow, Martin A. Kepler, Souza Oliveira Giovannini Junior, Odilon Hansen, Carl J. Kawaler, Steven D. |
dc.subject.por.fl_str_mv |
Estrelas binarias Fotometria estelar Anãs brancas Estrelas variaveis |
topic |
Estrelas binarias Fotometria estelar Anãs brancas Estrelas variaveis Binaries: general Stars: individual (G29-38) Stars: low-mass, brown dwarfs Stars: oscillations White dwarfs |
dc.subject.eng.fl_str_mv |
Binaries: general Stars: individual (G29-38) Stars: low-mass, brown dwarfs Stars: oscillations White dwarfs |
description |
Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain. |
publishDate |
1994 |
dc.date.issued.fl_str_mv |
1994 |
dc.date.accessioned.fl_str_mv |
2015-01-08T02:13:08Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/108840 |
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0004-637X |
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000256311 |
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http://hdl.handle.net/10183/108840 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The Astrophysical Journal. Chicago. Vol. 436, no. 2, pt. 1 (Dec. 1994), p. 875-884 |
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openAccess |
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