Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage

Autores
Van Soelen, Brian; Väisänen, Petri; Odendaal, Alida; Sushch, Iuri; Klindt, Lizelke; Meintjes, Pieter
Año de publicación
2015
Idioma
español castellano
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Theγ -ray binary system PSR B1259-63/LS 2883 passed through periastron in May of 2014 and was the focus of intensive multiwavelength campaigns. During the previous periastron, a large flare was detected at GeV energies 30 days after the 2010 periastron passage by Fermi-LAT. This event was re-detected during 2014 at a similar orbital phase. In order to place better constraints on the behaviour of the circumstellar disc around periastron, we performed optical spectroscopy of the Hα and He i (λ6678) lines with the Southern African Large Telescope (SALT) from 33 days before until 78 days after the 2014 periastron. The Hα line remains single peaked through all observations, but with a noted asymmetry and variation in shape. The He i line remains double peaked and shows a variation in the relative peak heights. Both lines show an increase in the equivalent width which peaks after periastron. The line strengths before periastron are, however, weaker than were detected around the 2010 periastron, though are comparable after periastron.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
periastron
circumstellar disc
optical spectroscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/168116

id SEDICI_3487159a17de41231ba7e033f28f5481
oai_identifier_str oai:sedici.unlp.edu.ar:10915/168116
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passageVan Soelen, BrianVäisänen, PetriOdendaal, AlidaSushch, IuriKlindt, LizelkeMeintjes, PieterCiencias Astronómicasperiastroncircumstellar discoptical spectroscopyTheγ -ray binary system PSR B1259-63/LS 2883 passed through periastron in May of 2014 and was the focus of intensive multiwavelength campaigns. During the previous periastron, a large flare was detected at GeV energies 30 days after the 2010 periastron passage by Fermi-LAT. This event was re-detected during 2014 at a similar orbital phase. In order to place better constraints on the behaviour of the circumstellar disc around periastron, we performed optical spectroscopy of the Hα and He i (λ6678) lines with the Southern African Large Telescope (SALT) from 33 days before until 78 days after the 2014 periastron. The Hα line remains single peaked through all observations, but with a noted asymmetry and variation in shape. The He i line remains double peaked and shows a variation in the relative peak heights. Both lines show an increase in the equivalent width which peaks after periastron. The line strengths before periastron are, however, weaker than were detected around the 2010 periastron, though are comparable after periastron.Facultad de Ciencias Astronómicas y Geofísicas2015-10info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdf187-190http://sedici.unlp.edu.ar/handle/10915/168116spainfo:eu-repo/semantics/altIdentifier/isbn/978-987-24948-3-4info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/167830info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:44:50Zoai:sedici.unlp.edu.ar:10915/168116Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:44:51.008SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
title Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
spellingShingle Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
Van Soelen, Brian
Ciencias Astronómicas
periastron
circumstellar disc
optical spectroscopy
title_short Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
title_full Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
title_fullStr Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
title_full_unstemmed Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
title_sort Optical spectroscopic monitoring of the variation in the circumstellar disc in PSR B1259-63/LS 2883 during the 2014 periastron passage
dc.creator.none.fl_str_mv Van Soelen, Brian
Väisänen, Petri
Odendaal, Alida
Sushch, Iuri
Klindt, Lizelke
Meintjes, Pieter
author Van Soelen, Brian
author_facet Van Soelen, Brian
Väisänen, Petri
Odendaal, Alida
Sushch, Iuri
Klindt, Lizelke
Meintjes, Pieter
author_role author
author2 Väisänen, Petri
Odendaal, Alida
Sushch, Iuri
Klindt, Lizelke
Meintjes, Pieter
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
periastron
circumstellar disc
optical spectroscopy
topic Ciencias Astronómicas
periastron
circumstellar disc
optical spectroscopy
dc.description.none.fl_txt_mv Theγ -ray binary system PSR B1259-63/LS 2883 passed through periastron in May of 2014 and was the focus of intensive multiwavelength campaigns. During the previous periastron, a large flare was detected at GeV energies 30 days after the 2010 periastron passage by Fermi-LAT. This event was re-detected during 2014 at a similar orbital phase. In order to place better constraints on the behaviour of the circumstellar disc around periastron, we performed optical spectroscopy of the Hα and He i (λ6678) lines with the Southern African Large Telescope (SALT) from 33 days before until 78 days after the 2014 periastron. The Hα line remains single peaked through all observations, but with a noted asymmetry and variation in shape. The He i line remains double peaked and shows a variation in the relative peak heights. Both lines show an increase in the equivalent width which peaks after periastron. The line strengths before periastron are, however, weaker than were detected around the 2010 periastron, though are comparable after periastron.
Facultad de Ciencias Astronómicas y Geofísicas
description Theγ -ray binary system PSR B1259-63/LS 2883 passed through periastron in May of 2014 and was the focus of intensive multiwavelength campaigns. During the previous periastron, a large flare was detected at GeV energies 30 days after the 2010 periastron passage by Fermi-LAT. This event was re-detected during 2014 at a similar orbital phase. In order to place better constraints on the behaviour of the circumstellar disc around periastron, we performed optical spectroscopy of the Hα and He i (λ6678) lines with the Southern African Large Telescope (SALT) from 33 days before until 78 days after the 2014 periastron. The Hα line remains single peaked through all observations, but with a noted asymmetry and variation in shape. The He i line remains double peaked and shows a variation in the relative peak heights. Both lines show an increase in the equivalent width which peaks after periastron. The line strengths before periastron are, however, weaker than were detected around the 2010 periastron, though are comparable after periastron.
publishDate 2015
dc.date.none.fl_str_mv 2015-10
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
Objeto de conferencia
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/168116
url http://sedici.unlp.edu.ar/handle/10915/168116
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-24948-3-4
info:eu-repo/semantics/reference/url/https://sedici.unlp.edu.ar/handle/10915/167830
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
187-190
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616315070840832
score 13.070432