Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066
Autor(a) principal: | |
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Data de Publicação: | 1995 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108728 |
Resumo: | As transition objects between the asymptotic giant branch (AGB) and cooling white dwarfs, the PG 1159 stars are key objects for understanding the late stages of stellar evolution. The pulsations exhibited by many members of the PG 1159 spectral class provide a mechanism for ferreting out this information. We present an analysis of the pulsation spectrum of the naked PG 1159 star PG 2131 +066, which we completely resolve using data from the Whole Earth Telescope (WET). The pulsation spectrum shows patterns that are expected from pulsation theory; comparison of these patterns with theoretical models indicate that PG 2131 has a mass of 0.61 ± 0.02 Mʘ, a luminosity of log (L/Lʘ) = 1.0 ± 0.2, and it lies ata distance of 470 +470 - 130pc. lt rotates with a period of 5.1 hr and shows evidence of a discontinuity in composition approximately 6 x 10- 3M* below the surface. Certain modes show complex structure in the power spectrum, while others show measur able frequency changes in 8 years. Fine structure in the prograde (m = -1) modes suggests the presence of nonlinear effects. |
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Kawaler, Steven D.O'Brien, M. SeanClemens, J. ChristopherNather, R. EdwardWinget, Donald EarlWatson, Todd K.Yanagida, K.Dixson, James S.Bradley, Paul A.Wood, Matthew A.Sullivan, Denis J.Kleinman, Scot JamesMeistas, Edmundas G.Leibowitz, Elia M.Moskalik, PawelZola, StaszekPajdosz, Y.Krzesinski, JerzySolheim, Jan-EricBruvold, A.O'Donoghue, DarraghKatz, M.Vauclair, GérardDolez, NoëlChevreton, MichelBarstow, Martin A.Kanaan Neto, Antonio NemerKepler, Souza OliveiraGiovannini Junior, OdilonProvencal, Judith L.Hansen, Carl J.2014-12-31T02:10:52Z19950004-637Xhttp://hdl.handle.net/10183/108728000084961As transition objects between the asymptotic giant branch (AGB) and cooling white dwarfs, the PG 1159 stars are key objects for understanding the late stages of stellar evolution. The pulsations exhibited by many members of the PG 1159 spectral class provide a mechanism for ferreting out this information. We present an analysis of the pulsation spectrum of the naked PG 1159 star PG 2131 +066, which we completely resolve using data from the Whole Earth Telescope (WET). The pulsation spectrum shows patterns that are expected from pulsation theory; comparison of these patterns with theoretical models indicate that PG 2131 has a mass of 0.61 ± 0.02 Mʘ, a luminosity of log (L/Lʘ) = 1.0 ± 0.2, and it lies ata distance of 470 +470 - 130pc. lt rotates with a period of 5.1 hr and shows evidence of a discontinuity in composition approximately 6 x 10- 3M* below the surface. Certain modes show complex structure in the power spectrum, while others show measur able frequency changes in 8 years. Fine structure in the prograde (m = -1) modes suggests the presence of nonlinear effects.application/pdfengThe astrophysical journal. Chicago. Vol. 450, no. 1, pt. 1 (Sept. 1995), p. 350-363Estrelas variaveisMassa estelarRadiação estelarPulsacoes estelaresAnãs brancasStars: fundamental parametersStars: individual (PG 2131 +066)Stars: oscillationsWhite dwarfsWhole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066Estrangeiroinfo: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:UFRGSORIGINAL000084961.pdf000084961.pdfTexto completo (inglês)application/pdf358827http://www.lume.ufrgs.br/bitstream/10183/108728/1/000084961.pdf8935eea2e2c9724dcfd581fa78acbf1eMD51TEXT000084961.pdf.txt000084961.pdf.txtExtracted Texttext/plain308http://www.lume.ufrgs.br/bitstream/10183/108728/2/000084961.pdf.txt1bada2623193244b4051d40b6c783d8dMD52THUMBNAIL000084961.pdf.jpg000084961.pdf.jpgGenerated Thumbnailimage/jpeg2191http://www.lume.ufrgs.br/bitstream/10183/108728/3/000084961.pdf.jpg1f4b288e61a6d5b1b544460d39d26dd7MD5310183/1087282018-10-23 08:33:04.358oai:www.lume.ufrgs.br:10183/108728Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-23T11:33:04Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
title |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
spellingShingle |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 Kawaler, Steven D. Estrelas variaveis Massa estelar Radiação estelar Pulsacoes estelares Anãs brancas Stars: fundamental parameters Stars: individual (PG 2131 +066) Stars: oscillations White dwarfs |
title_short |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
title_full |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
title_fullStr |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
title_full_unstemmed |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
title_sort |
Whole Earth Telescope observations and seismological analysis of the pre-white dwarf pg 2131+066 |
author |
Kawaler, Steven D. |
author_facet |
Kawaler, Steven D. O'Brien, M. Sean Clemens, J. Christopher Nather, R. Edward Winget, Donald Earl Watson, Todd K. Yanagida, K. Dixson, James S. Bradley, Paul A. Wood, Matthew A. Sullivan, Denis J. Kleinman, Scot James 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. Kanaan Neto, Antonio Nemer Kepler, Souza Oliveira Giovannini Junior, Odilon Provencal, Judith L. Hansen, Carl J. |
author_role |
author |
author2 |
O'Brien, M. Sean Clemens, J. Christopher Nather, R. Edward Winget, Donald Earl Watson, Todd K. Yanagida, K. Dixson, James S. Bradley, Paul A. Wood, Matthew A. Sullivan, Denis J. Kleinman, Scot James 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. Kanaan Neto, Antonio Nemer Kepler, Souza Oliveira Giovannini Junior, Odilon Provencal, Judith L. Hansen, Carl J. |
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 |
Kawaler, Steven D. O'Brien, M. Sean Clemens, J. Christopher Nather, R. Edward Winget, Donald Earl Watson, Todd K. Yanagida, K. Dixson, James S. Bradley, Paul A. Wood, Matthew A. Sullivan, Denis J. Kleinman, Scot James 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. Kanaan Neto, Antonio Nemer Kepler, Souza Oliveira Giovannini Junior, Odilon Provencal, Judith L. Hansen, Carl J. |
dc.subject.por.fl_str_mv |
Estrelas variaveis Massa estelar Radiação estelar Pulsacoes estelares Anãs brancas |
topic |
Estrelas variaveis Massa estelar Radiação estelar Pulsacoes estelares Anãs brancas Stars: fundamental parameters Stars: individual (PG 2131 +066) Stars: oscillations White dwarfs |
dc.subject.eng.fl_str_mv |
Stars: fundamental parameters Stars: individual (PG 2131 +066) Stars: oscillations White dwarfs |
description |
As transition objects between the asymptotic giant branch (AGB) and cooling white dwarfs, the PG 1159 stars are key objects for understanding the late stages of stellar evolution. The pulsations exhibited by many members of the PG 1159 spectral class provide a mechanism for ferreting out this information. We present an analysis of the pulsation spectrum of the naked PG 1159 star PG 2131 +066, which we completely resolve using data from the Whole Earth Telescope (WET). The pulsation spectrum shows patterns that are expected from pulsation theory; comparison of these patterns with theoretical models indicate that PG 2131 has a mass of 0.61 ± 0.02 Mʘ, a luminosity of log (L/Lʘ) = 1.0 ± 0.2, and it lies ata distance of 470 +470 - 130pc. lt rotates with a period of 5.1 hr and shows evidence of a discontinuity in composition approximately 6 x 10- 3M* below the surface. Certain modes show complex structure in the power spectrum, while others show measur able frequency changes in 8 years. Fine structure in the prograde (m = -1) modes suggests the presence of nonlinear effects. |
publishDate |
1995 |
dc.date.issued.fl_str_mv |
1995 |
dc.date.accessioned.fl_str_mv |
2014-12-31T02:10:52Z |
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/10183/108728 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-637X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000084961 |
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0004-637X 000084961 |
url |
http://hdl.handle.net/10183/108728 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Chicago. Vol. 450, no. 1, pt. 1 (Sept. 1995), p. 350-363 |
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openAccess |
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