Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations

Autores
Corsico, Alejandro Hugo; Romero, Alejandra Daniela; Althaus, Leandro Gabriel; Pelisoli, I.; Kepler, S. O.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The Blue Large-Amplitude Pulsators (BLAPs) constitute a new class ofpulsating stars. They are hot stars with effective temperatures of Teff∼30000 K and surface gravities of logg∼4.9, that pulsatewith periods in the range ∼20−40 min. In Romero et al. (2018), weproposed that BLAPs are hot low-mass He-core pre-white dwarf (WD) stars thatpulsate either in high-order non-radial g(gravity) modes or low-order radialmodes, including the fundamental radial mode. The theoretical modes withperiods in the observed range are unstable due to the κ mechanismassociated with the Z bump in the opacity at logT∼5.25. In thiswork, we extend the study of Romero et al. (2018) by assessing the rate ofperiod changes of nonradial g modes and radial modes and comparing them withthe values measured for BLAPs, in an attempt to validate the proposedevolutionary scenario, and to discern whether the observed modes are high-orderg modes or radial modes.
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Romero, Alejandra Daniela. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Pelisoli, I.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
21st European Workshop on White Dwarf
Austin
Estados Unidos
University of Texas at Austin
Materia
asteroseismology
stellar Evolution
white dwarfs
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:11336/268739
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsationsCorsico, Alejandro HugoRomero, Alejandra DanielaAlthaus, Leandro GabrielPelisoli, I.Kepler, S. O.asteroseismologystellar Evolutionwhite dwarfshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The Blue Large-Amplitude Pulsators (BLAPs) constitute a new class ofpulsating stars. They are hot stars with effective temperatures of Teff∼30000 K and surface gravities of logg∼4.9, that pulsatewith periods in the range ∼20−40 min. In Romero et al. (2018), weproposed that BLAPs are hot low-mass He-core pre-white dwarf (WD) stars thatpulsate either in high-order non-radial g(gravity) modes or low-order radialmodes, including the fundamental radial mode. The theoretical modes withperiods in the observed range are unstable due to the κ mechanismassociated with the Z bump in the opacity at logT∼5.25. In thiswork, we extend the study of Romero et al. (2018) by assessing the rate ofperiod changes of nonradial g modes and radial modes and comparing them withthe values measured for BLAPs, in an attempt to validate the proposedevolutionary scenario, and to discern whether the observed modes are high-orderg modes or radial modes.Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Romero, Alejandra Daniela. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Pelisoli, I.. Universidade Federal do Rio Grande do Sul; BrasilFil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil21st European Workshop on White DwarfAustinEstados UnidosUniversity of Texas at AustinUniversity of Texas at AustinCastanheira, Barbara2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectWorkshopBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268739Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations; 21st European Workshop on White Dwarf; Austin; Estados Unidos; 2018; 1-7CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1809.07451v1Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:35:02Zoai:ri.conicet.gov.ar:11336/268739instacron: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:34982025-10-22 11:35:03.058CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
title Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
spellingShingle Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
Corsico, Alejandro Hugo
asteroseismology
stellar Evolution
white dwarfs
title_short Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
title_full Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
title_fullStr Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
title_full_unstemmed Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
title_sort Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations
dc.creator.none.fl_str_mv Corsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Pelisoli, I.
Kepler, S. O.
author Corsico, Alejandro Hugo
author_facet Corsico, Alejandro Hugo
Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Pelisoli, I.
Kepler, S. O.
author_role author
author2 Romero, Alejandra Daniela
Althaus, Leandro Gabriel
Pelisoli, I.
Kepler, S. O.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Castanheira, Barbara
dc.subject.none.fl_str_mv asteroseismology
stellar Evolution
white dwarfs
topic asteroseismology
stellar Evolution
white dwarfs
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Blue Large-Amplitude Pulsators (BLAPs) constitute a new class ofpulsating stars. They are hot stars with effective temperatures of Teff∼30000 K and surface gravities of logg∼4.9, that pulsatewith periods in the range ∼20−40 min. In Romero et al. (2018), weproposed that BLAPs are hot low-mass He-core pre-white dwarf (WD) stars thatpulsate either in high-order non-radial g(gravity) modes or low-order radialmodes, including the fundamental radial mode. The theoretical modes withperiods in the observed range are unstable due to the κ mechanismassociated with the Z bump in the opacity at logT∼5.25. In thiswork, we extend the study of Romero et al. (2018) by assessing the rate ofperiod changes of nonradial g modes and radial modes and comparing them withthe values measured for BLAPs, in an attempt to validate the proposedevolutionary scenario, and to discern whether the observed modes are high-orderg modes or radial modes.
Fil: Corsico, Alejandro Hugo. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Romero, Alejandra Daniela. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Althaus, Leandro Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; 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: Pelisoli, I.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Kepler, S. O.. Universidade Federal do Rio Grande do Sul; Brasil
21st European Workshop on White Dwarf
Austin
Estados Unidos
University of Texas at Austin
description The Blue Large-Amplitude Pulsators (BLAPs) constitute a new class ofpulsating stars. They are hot stars with effective temperatures of Teff∼30000 K and surface gravities of logg∼4.9, that pulsatewith periods in the range ∼20−40 min. In Romero et al. (2018), weproposed that BLAPs are hot low-mass He-core pre-white dwarf (WD) stars thatpulsate either in high-order non-radial g(gravity) modes or low-order radialmodes, including the fundamental radial mode. The theoretical modes withperiods in the observed range are unstable due to the κ mechanismassociated with the Z bump in the opacity at logT∼5.25. In thiswork, we extend the study of Romero et al. (2018) by assessing the rate ofperiod changes of nonradial g modes and radial modes and comparing them withthe values measured for BLAPs, in an attempt to validate the proposedevolutionary scenario, and to discern whether the observed modes are high-orderg modes or radial modes.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Workshop
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268739
Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations; 21st European Workshop on White Dwarf; Austin; Estados Unidos; 2018; 1-7
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268739
identifier_str_mv Blue Large-Amplitude Pulsators (BLAPs): possible origin, evolutionary status, and nature of their pulsations; 21st European Workshop on White Dwarf; Austin; Estados Unidos; 2018; 1-7
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://arxiv.org/abs/1809.07451v1
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
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv University of Texas at Austin
publisher.none.fl_str_mv University of Texas at Austin
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 12.982451

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