Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations

Autores
Marcote, Benito; Ribó, Marc; Paredes, Josep Maria; Ishwara-Chandra, C. H.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
LS 5039 is a gamma-ray binary displaying synchrotron emission at GHz radio frequencies with a small variability and without signatures of being orbitally modulated. A detailed study in the 0.15–15 GHz range has been carried out by analyzing VLA, GMRT and WSRT observations, obtaining an average spectrum and two quasi-simultaneous spectra. We have observed a persistent radio emission on day, week and year timescales, with a variability below 25% and with no signatures of orbital modulation at all frequencies except at 150 MHz, where the source remains undetected. The spectra reveal a power-law emission at high frequencies (& 1 GHz) and a turnover at about 0.5 GHz. We explain these spectra with a simple model of one-zone synchrotron emitting region. Synchrotron self-absorption and Razin effect explain the absorption at low frequencies (.1 GHz). With this model we have obtained an estimate of the physical properties of the radio emitting region of LS 5039, and derived a high mixing of the stellar wind within the relativistic plasma of the radio outflow.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
gamma-ray binary
radio emission
physical properties
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:10915/167939
Acceder
id SEDICI_dc7683a8810d5786c773f12c8839b000
oai_identifier_str oai:sedici.unlp.edu.ar:10915/167939
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observationsMarcote, BenitoRibó, MarcParedes, Josep MariaIshwara-Chandra, C. H.Ciencias Astronómicasgamma-ray binaryradio emissionphysical propertiesLS 5039 is a gamma-ray binary displaying synchrotron emission at GHz radio frequencies with a small variability and without signatures of being orbitally modulated. A detailed study in the 0.15–15 GHz range has been carried out by analyzing VLA, GMRT and WSRT observations, obtaining an average spectrum and two quasi-simultaneous spectra. We have observed a persistent radio emission on day, week and year timescales, with a variability below 25% and with no signatures of orbital modulation at all frequencies except at 150 MHz, where the source remains undetected. The spectra reveal a power-law emission at high frequencies (& 1 GHz) and a turnover at about 0.5 GHz. We explain these spectra with a simple model of one-zone synchrotron emitting region. Synchrotron self-absorption and Razin effect explain the absorption at low frequencies (.1 GHz). With this model we have obtained an estimate of the physical properties of the radio emitting region of LS 5039, and derived a high mixing of the stellar wind within the relativistic plasma of the radio outflow.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/pdf67-82http://sedici.unlp.edu.ar/handle/10915/167939enginfo: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:UNLP2025-10-15T11:36:31Zoai:sedici.unlp.edu.ar:10915/167939Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:36:31.488SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
title Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
spellingShingle Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
Marcote, Benito
Ciencias Astronómicas
gamma-ray binary
radio emission
physical properties
title_short Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
title_full Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
title_fullStr Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
title_full_unstemmed Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
title_sort Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
dc.creator.none.fl_str_mv Marcote, Benito
Ribó, Marc
Paredes, Josep Maria
Ishwara-Chandra, C. H.
author Marcote, Benito
author_facet Marcote, Benito
Ribó, Marc
Paredes, Josep Maria
Ishwara-Chandra, C. H.
author_role author
author2 Ribó, Marc
Paredes, Josep Maria
Ishwara-Chandra, C. H.
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
gamma-ray binary
radio emission
physical properties
topic Ciencias Astronómicas
gamma-ray binary
radio emission
physical properties
dc.description.none.fl_txt_mv LS 5039 is a gamma-ray binary displaying synchrotron emission at GHz radio frequencies with a small variability and without signatures of being orbitally modulated. A detailed study in the 0.15–15 GHz range has been carried out by analyzing VLA, GMRT and WSRT observations, obtaining an average spectrum and two quasi-simultaneous spectra. We have observed a persistent radio emission on day, week and year timescales, with a variability below 25% and with no signatures of orbital modulation at all frequencies except at 150 MHz, where the source remains undetected. The spectra reveal a power-law emission at high frequencies (& 1 GHz) and a turnover at about 0.5 GHz. We explain these spectra with a simple model of one-zone synchrotron emitting region. Synchrotron self-absorption and Razin effect explain the absorption at low frequencies (.1 GHz). With this model we have obtained an estimate of the physical properties of the radio emitting region of LS 5039, and derived a high mixing of the stellar wind within the relativistic plasma of the radio outflow.
Facultad de Ciencias Astronómicas y Geofísicas
description LS 5039 is a gamma-ray binary displaying synchrotron emission at GHz radio frequencies with a small variability and without signatures of being orbitally modulated. A detailed study in the 0.15–15 GHz range has been carried out by analyzing VLA, GMRT and WSRT observations, obtaining an average spectrum and two quasi-simultaneous spectra. We have observed a persistent radio emission on day, week and year timescales, with a variability below 25% and with no signatures of orbital modulation at all frequencies except at 150 MHz, where the source remains undetected. The spectra reveal a power-law emission at high frequencies (& 1 GHz) and a turnover at about 0.5 GHz. We explain these spectra with a simple model of one-zone synchrotron emitting region. Synchrotron self-absorption and Razin effect explain the absorption at low frequencies (.1 GHz). With this model we have obtained an estimate of the physical properties of the radio emitting region of LS 5039, and derived a high mixing of the stellar wind within the relativistic plasma of the radio outflow.
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/10915/167939
url http://sedici.unlp.edu.ar/handle/10915/167939
dc.language.none.fl_str_mv eng
language eng
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
67-82
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_ 1846064387833462784
score 12.891075

Publicaciones similares