Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980

Autores
Koenigsberger, Gloria; Georgiev, Leonid; Barba, Rodolfo Héctor; Tzvetanov, Zlatan; Walborn, Nolan Revere; Niemela, Virpi S.; Morrell, Nidia Irene; Schulte Ladbeck, Regina
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report the results of Hubble Space Telescope STIS observations of the intriguing luminous blue variable/Wolf-Rayet binary system HD 5980 in the Small Magellanic Cloud. Although its spectral characteristics (WN6) are currently very similar to those observed in 1995 in the FUV, some of the line fluxes continue with the increasing trend observed since the 1980s. The erupting star still dominates the emission-line spectrum, and a radial velocity curve from UV lines is derived, supporting previous estimates of its mass (50 M⊙). A rough estimate of 2 × 10-4 M⊙ yr-1 for the current mass-loss rate of this star is derived. The only spectral lines attributable to the close companion are the very extended P Cygni absorption components of the strong UV lines, present only during the eclipse of the eruptor, implying that the wind-wind collision shock cone winds tightly around this companion. A third stellar component contributing to the spectrum is detected through the presence of stationary photospheric absorption lines in the UV spectrum. This object contributes ∼30% to the UV continuum luminosity. A new set of ISM absorption components at -680 km s-1 has appeared as a result of the shock interface between the slow wind (∼400 km s-1) that emerged during the 1994 eruption and the subsequently emerging fast wind (∼2000 km s-1) phases.
Fil: Koenigsberger, Gloria. Universidad Nacional Autónoma de México; México
Fil: Georgiev, Leonid. Universidad Nacional Autónoma de México; México
Fil: Barba, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Tzvetanov, Zlatan. University Johns Hopkins; Estados Unidos
Fil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados Unidos
Fil: Niemela, Virpi S.. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
Fil: Morrell, Nidia Irene. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Schulte Ladbeck, Regina. University of Pittsburgh; Estados Unidos. University of Pittsburgh at Johnstown; Estados Unidos
Materia
BINARIES: GENERAL
STARS: EVOLUTION
STARS: INDIVIDUAL (HD 5980)
STARS: VARIABLES: OTHER
STARS: WINDS, OUTFLOWS
STARS: WOLF-RAYET
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/214201
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/214201
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980Koenigsberger, GloriaGeorgiev, LeonidBarba, Rodolfo HéctorTzvetanov, ZlatanWalborn, Nolan RevereNiemela, Virpi S.Morrell, Nidia IreneSchulte Ladbeck, ReginaBINARIES: GENERALSTARS: EVOLUTIONSTARS: INDIVIDUAL (HD 5980)STARS: VARIABLES: OTHERSTARS: WINDS, OUTFLOWSSTARS: WOLF-RAYEThttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report the results of Hubble Space Telescope STIS observations of the intriguing luminous blue variable/Wolf-Rayet binary system HD 5980 in the Small Magellanic Cloud. Although its spectral characteristics (WN6) are currently very similar to those observed in 1995 in the FUV, some of the line fluxes continue with the increasing trend observed since the 1980s. The erupting star still dominates the emission-line spectrum, and a radial velocity curve from UV lines is derived, supporting previous estimates of its mass (50 M⊙). A rough estimate of 2 × 10-4 M⊙ yr-1 for the current mass-loss rate of this star is derived. The only spectral lines attributable to the close companion are the very extended P Cygni absorption components of the strong UV lines, present only during the eclipse of the eruptor, implying that the wind-wind collision shock cone winds tightly around this companion. A third stellar component contributing to the spectrum is detected through the presence of stationary photospheric absorption lines in the UV spectrum. This object contributes ∼30% to the UV continuum luminosity. A new set of ISM absorption components at -680 km s-1 has appeared as a result of the shock interface between the slow wind (∼400 km s-1) that emerged during the 1994 eruption and the subsequently emerging fast wind (∼2000 km s-1) phases.Fil: Koenigsberger, Gloria. Universidad Nacional Autónoma de México; MéxicoFil: Georgiev, Leonid. Universidad Nacional Autónoma de México; MéxicoFil: Barba, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Tzvetanov, Zlatan. University Johns Hopkins; Estados UnidosFil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados UnidosFil: Niemela, Virpi S.. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; ArgentinaFil: Morrell, Nidia Irene. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Schulte Ladbeck, Regina. University of Pittsburgh; Estados Unidos. University of Pittsburgh at Johnstown; Estados UnidosIOP Publishing2000-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/214201Koenigsberger, Gloria; Georgiev, Leonid; Barba, Rodolfo Héctor; Tzvetanov, Zlatan; Walborn, Nolan Revere; et al.; Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980; IOP Publishing; Astrophysical Journal; 542; 1 PART 1; 12-2000; 428-4450004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1086/309529info:eu-repo/semantics/altIdentifier/doi/10.1086/309529info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:29:49Zoai:ri.conicet.gov.ar:11336/214201instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:29:49.282CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
title Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
spellingShingle Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
Koenigsberger, Gloria
BINARIES: GENERAL
STARS: EVOLUTION
STARS: INDIVIDUAL (HD 5980)
STARS: VARIABLES: OTHER
STARS: WINDS, OUTFLOWS
STARS: WOLF-RAYET
title_short Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
title_full Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
title_fullStr Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
title_full_unstemmed Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
title_sort Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980
dc.creator.none.fl_str_mv Koenigsberger, Gloria
Georgiev, Leonid
Barba, Rodolfo Héctor
Tzvetanov, Zlatan
Walborn, Nolan Revere
Niemela, Virpi S.
Morrell, Nidia Irene
Schulte Ladbeck, Regina
author Koenigsberger, Gloria
author_facet Koenigsberger, Gloria
Georgiev, Leonid
Barba, Rodolfo Héctor
Tzvetanov, Zlatan
Walborn, Nolan Revere
Niemela, Virpi S.
Morrell, Nidia Irene
Schulte Ladbeck, Regina
author_role author
author2 Georgiev, Leonid
Barba, Rodolfo Héctor
Tzvetanov, Zlatan
Walborn, Nolan Revere
Niemela, Virpi S.
Morrell, Nidia Irene
Schulte Ladbeck, Regina
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BINARIES: GENERAL
STARS: EVOLUTION
STARS: INDIVIDUAL (HD 5980)
STARS: VARIABLES: OTHER
STARS: WINDS, OUTFLOWS
STARS: WOLF-RAYET
topic BINARIES: GENERAL
STARS: EVOLUTION
STARS: INDIVIDUAL (HD 5980)
STARS: VARIABLES: OTHER
STARS: WINDS, OUTFLOWS
STARS: WOLF-RAYET
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report the results of Hubble Space Telescope STIS observations of the intriguing luminous blue variable/Wolf-Rayet binary system HD 5980 in the Small Magellanic Cloud. Although its spectral characteristics (WN6) are currently very similar to those observed in 1995 in the FUV, some of the line fluxes continue with the increasing trend observed since the 1980s. The erupting star still dominates the emission-line spectrum, and a radial velocity curve from UV lines is derived, supporting previous estimates of its mass (50 M⊙). A rough estimate of 2 × 10-4 M⊙ yr-1 for the current mass-loss rate of this star is derived. The only spectral lines attributable to the close companion are the very extended P Cygni absorption components of the strong UV lines, present only during the eclipse of the eruptor, implying that the wind-wind collision shock cone winds tightly around this companion. A third stellar component contributing to the spectrum is detected through the presence of stationary photospheric absorption lines in the UV spectrum. This object contributes ∼30% to the UV continuum luminosity. A new set of ISM absorption components at -680 km s-1 has appeared as a result of the shock interface between the slow wind (∼400 km s-1) that emerged during the 1994 eruption and the subsequently emerging fast wind (∼2000 km s-1) phases.
Fil: Koenigsberger, Gloria. Universidad Nacional Autónoma de México; México
Fil: Georgiev, Leonid. Universidad Nacional Autónoma de México; México
Fil: Barba, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Tzvetanov, Zlatan. University Johns Hopkins; Estados Unidos
Fil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados Unidos
Fil: Niemela, Virpi S.. Universidad Nacional de La Plata; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina
Fil: Morrell, Nidia Irene. Universidad Nacional de La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Schulte Ladbeck, Regina. University of Pittsburgh; Estados Unidos. University of Pittsburgh at Johnstown; Estados Unidos
description We report the results of Hubble Space Telescope STIS observations of the intriguing luminous blue variable/Wolf-Rayet binary system HD 5980 in the Small Magellanic Cloud. Although its spectral characteristics (WN6) are currently very similar to those observed in 1995 in the FUV, some of the line fluxes continue with the increasing trend observed since the 1980s. The erupting star still dominates the emission-line spectrum, and a radial velocity curve from UV lines is derived, supporting previous estimates of its mass (50 M⊙). A rough estimate of 2 × 10-4 M⊙ yr-1 for the current mass-loss rate of this star is derived. The only spectral lines attributable to the close companion are the very extended P Cygni absorption components of the strong UV lines, present only during the eclipse of the eruptor, implying that the wind-wind collision shock cone winds tightly around this companion. A third stellar component contributing to the spectrum is detected through the presence of stationary photospheric absorption lines in the UV spectrum. This object contributes ∼30% to the UV continuum luminosity. A new set of ISM absorption components at -680 km s-1 has appeared as a result of the shock interface between the slow wind (∼400 km s-1) that emerged during the 1994 eruption and the subsequently emerging fast wind (∼2000 km s-1) phases.
publishDate 2000
dc.date.none.fl_str_mv 2000-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/214201
Koenigsberger, Gloria; Georgiev, Leonid; Barba, Rodolfo Héctor; Tzvetanov, Zlatan; Walborn, Nolan Revere; et al.; Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980; IOP Publishing; Astrophysical Journal; 542; 1 PART 1; 12-2000; 428-445
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/214201
identifier_str_mv Koenigsberger, Gloria; Georgiev, Leonid; Barba, Rodolfo Héctor; Tzvetanov, Zlatan; Walborn, Nolan Revere; et al.; Hubble Space Telescope Observations of the Luminous Blue Variable/W-R Eclipsing Binary System HD 5980; IOP Publishing; Astrophysical Journal; 542; 1 PART 1; 12-2000; 428-445
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1086/309529
info:eu-repo/semantics/altIdentifier/doi/10.1086/309529
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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