White dwarf mass distribution in the SDSS
Autor(a) principal: | |
---|---|
Data de Publicação: | 2007 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/90266 |
Resumo: | We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in Data Release 4 of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the most massive stars by fitting the SDSS optical spectra with a synthetic spectra grid derived from model atmospheres extending to log g = 10.0. We also calculate radii from evolutionary models and create volume-corrected mass distributions for our DA and DB samples. The mean mass for the DA stars brighter than g = 19 and hotter than Teff = 12 000K is (M) DA - ~ 0.593 ± 0.016Mʘ. For the 150 DBs brighter than g = 19 and hotter than Teff = 16 000 K, we find (M) DB = 0.711 ± 0.009Mʘ. It appears the mean mass for DB white dwarf stars may be significantly larger than that for DAs. We also report the highest mass white dwarf stars ever found, up to 1.33Mʘ. |
id |
UFRGS-2_5b71df7402e24262aad3ee2093fd76c3 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/90266 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Kepler, Souza OliveiraKleinman, Scot JamesNitta, AtsukoKoester, DetlevCastanheira, Bárbara GarciaGiovannini Junior, OdilonCosta, Alex Fabiano Murillo daAlthaus, Leandro Gabriel2014-04-03T01:51:25Z20070035-8711http://hdl.handle.net/10183/90266000586456We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in Data Release 4 of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the most massive stars by fitting the SDSS optical spectra with a synthetic spectra grid derived from model atmospheres extending to log g = 10.0. We also calculate radii from evolutionary models and create volume-corrected mass distributions for our DA and DB samples. The mean mass for the DA stars brighter than g = 19 and hotter than Teff = 12 000K is (M) DA - ~ 0.593 ± 0.016Mʘ. For the 150 DBs brighter than g = 19 and hotter than Teff = 16 000 K, we find (M) DB = 0.711 ± 0.009Mʘ. It appears the mean mass for DB white dwarf stars may be significantly larger than that for DAs. We also report the highest mass white dwarf stars ever found, up to 1.33Mʘ.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 375, no. 4 (Mar 2007), p. 1315-1324Anãs brancasMassa estelarWhite dwarfsWhite dwarf mass distribution in the SDSSEstrangeiroinfo: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:UFRGSORIGINAL000586456.pdf000586456.pdfTexto completo (inglês)application/pdf1178962http://www.lume.ufrgs.br/bitstream/10183/90266/1/000586456.pdf900bba3370927d460ac0d93e3e0b1c3aMD51TEXT000586456.pdf.txt000586456.pdf.txtExtracted Texttext/plain43673http://www.lume.ufrgs.br/bitstream/10183/90266/2/000586456.pdf.txt27e9c56f86132ad7ed5615c240eab38bMD52THUMBNAIL000586456.pdf.jpg000586456.pdf.jpgGenerated Thumbnailimage/jpeg2041http://www.lume.ufrgs.br/bitstream/10183/90266/3/000586456.pdf.jpg7bac003b89051275ce7d35102dec1e57MD5310183/902662018-10-18 09:16:41.934oai:www.lume.ufrgs.br:10183/90266Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-18T12:16:41Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
White dwarf mass distribution in the SDSS |
title |
White dwarf mass distribution in the SDSS |
spellingShingle |
White dwarf mass distribution in the SDSS Kepler, Souza Oliveira Anãs brancas Massa estelar White dwarfs |
title_short |
White dwarf mass distribution in the SDSS |
title_full |
White dwarf mass distribution in the SDSS |
title_fullStr |
White dwarf mass distribution in the SDSS |
title_full_unstemmed |
White dwarf mass distribution in the SDSS |
title_sort |
White dwarf mass distribution in the SDSS |
author |
Kepler, Souza Oliveira |
author_facet |
Kepler, Souza Oliveira Kleinman, Scot James Nitta, Atsuko Koester, Detlev Castanheira, Bárbara Garcia Giovannini Junior, Odilon Costa, Alex Fabiano Murillo da Althaus, Leandro Gabriel |
author_role |
author |
author2 |
Kleinman, Scot James Nitta, Atsuko Koester, Detlev Castanheira, Bárbara Garcia Giovannini Junior, Odilon Costa, Alex Fabiano Murillo da Althaus, Leandro Gabriel |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Kepler, Souza Oliveira Kleinman, Scot James Nitta, Atsuko Koester, Detlev Castanheira, Bárbara Garcia Giovannini Junior, Odilon Costa, Alex Fabiano Murillo da Althaus, Leandro Gabriel |
dc.subject.por.fl_str_mv |
Anãs brancas Massa estelar |
topic |
Anãs brancas Massa estelar White dwarfs |
dc.subject.eng.fl_str_mv |
White dwarfs |
description |
We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in Data Release 4 of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the most massive stars by fitting the SDSS optical spectra with a synthetic spectra grid derived from model atmospheres extending to log g = 10.0. We also calculate radii from evolutionary models and create volume-corrected mass distributions for our DA and DB samples. The mean mass for the DA stars brighter than g = 19 and hotter than Teff = 12 000K is (M) DA - ~ 0.593 ± 0.016Mʘ. For the 150 DBs brighter than g = 19 and hotter than Teff = 16 000 K, we find (M) DB = 0.711 ± 0.009Mʘ. It appears the mean mass for DB white dwarf stars may be significantly larger than that for DAs. We also report the highest mass white dwarf stars ever found, up to 1.33Mʘ. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2014-04-03T01:51:25Z |
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/10183/90266 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000586456 |
identifier_str_mv |
0035-8711 000586456 |
url |
http://hdl.handle.net/10183/90266 |
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. 375, no. 4 (Mar 2007), p. 1315-1324 |
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 |
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 |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/90266/1/000586456.pdf http://www.lume.ufrgs.br/bitstream/10183/90266/2/000586456.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/90266/3/000586456.pdf.jpg |
bitstream.checksum.fl_str_mv |
900bba3370927d460ac0d93e3e0b1c3a 27e9c56f86132ad7ed5615c240eab38b 7bac003b89051275ce7d35102dec1e57 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224830456954880 |