Jets in neutron star X-ray binaries: a comparison with black holes

We present a comprehensive study of the relation between radio and X-ray emission in neutron star (NS) X-ray binaries, use this to infer the general properties of the disc-jet coupling in such systems and compare the results quantitatively with those already established for black hole (BH) systems....

ver descrição completa

Detalhes bibliográficos
Autores: Migliari, Simone, Fender, R. P.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/99491
Acesso em linha:https://hdl.handle.net/2445/99491
Access Level:acceso abierto
Palavra-chave:Estels binaris de raigs X
Forats negres (Astronomia)
Jets (Astrofísica)
Estels de neutrons
X-ray binaries
Black holes (Astronomy)
Astrophysical jets
Neutron stars
id ES_3f130c6a87bcf5501bfd2bea08f69604
oai_identifier_str oai:diposit.ub.edu:2445/99491
network_acronym_str ES
network_name_str España
repository_id_str
spelling Jets in neutron star X-ray binaries: a comparison with black holesMigliari, SimoneFender, R. P.Estels binaris de raigs XForats negres (Astronomia)Jets (Astrofísica)Estels de neutronsX-ray binariesBlack holes (Astronomy)Astrophysical jetsNeutron starsWe present a comprehensive study of the relation between radio and X-ray emission in neutron star (NS) X-ray binaries, use this to infer the general properties of the disc-jet coupling in such systems and compare the results quantitatively with those already established for black hole (BH) systems. There are clear qualitative similarities between the two classes of object: hard states below about 1 per cent of the Eddington luminosity produce steady jets, while transient jets are associated with outbursting and variable sources at the highest luminosities. However, there are important quantitative differences: the NSs are less radio loud for a given X-ray luminosity (regardless of mass corrections) and they do not appear to show the strong suppression of radio emission in steady soft states that we observe in BH systems. Furthermore, in the hard states, the correlation between radio and X-ray luminosities of the NS systems is steeper than the relation observed in BHs by about a factor of 2. This result strongly suggests that the X-ray emission in the BH systems is radiatively inefficient, with an approximate relation of the form Graphic, consistent with both advection-dominated models and the jet-dominated scenario. In contrast, the jet power in both classes of object scales linearly with accretion rate. This constitutes some of the first observational evidence for the radiatively inefficient scaling of X-ray luminosity with accretion rate in accreting BH systems. Moreover, based on simultaneous radio/X-ray observations of Z-type NSs (the brightest of our Galaxy, always near or at the Eddington accretion rate), we draw a model that can describe the disc-jet coupling in such sources, finding a possible association between a particular X-ray state transition [horizontal branch to normal branch] and the emission of transient jets.Royal Astronomical Society2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/99491Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1111/j.1365-2966.2005.09777.xMonthly Notices of the Royal Astronomical Society, 2006, vol. 366, num. 1, p. 79-91http://dx.doi.org/10.1111/j.1365-2966.2005.09777.x(c) Migliari, Simone et al., 2006info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/994912026-05-27T06:46:51Z
dc.title.none.fl_str_mv Jets in neutron star X-ray binaries: a comparison with black holes
title Jets in neutron star X-ray binaries: a comparison with black holes
spellingShingle Jets in neutron star X-ray binaries: a comparison with black holes
Migliari, Simone
Estels binaris de raigs X
Forats negres (Astronomia)
Jets (Astrofísica)
Estels de neutrons
X-ray binaries
Black holes (Astronomy)
Astrophysical jets
Neutron stars
title_short Jets in neutron star X-ray binaries: a comparison with black holes
title_full Jets in neutron star X-ray binaries: a comparison with black holes
title_fullStr Jets in neutron star X-ray binaries: a comparison with black holes
title_full_unstemmed Jets in neutron star X-ray binaries: a comparison with black holes
title_sort Jets in neutron star X-ray binaries: a comparison with black holes
dc.creator.none.fl_str_mv Migliari, Simone
Fender, R. P.
author Migliari, Simone
author_facet Migliari, Simone
Fender, R. P.
author_role author
author2 Fender, R. P.
author2_role author
dc.subject.none.fl_str_mv Estels binaris de raigs X
Forats negres (Astronomia)
Jets (Astrofísica)
Estels de neutrons
X-ray binaries
Black holes (Astronomy)
Astrophysical jets
Neutron stars
topic Estels binaris de raigs X
Forats negres (Astronomia)
Jets (Astrofísica)
Estels de neutrons
X-ray binaries
Black holes (Astronomy)
Astrophysical jets
Neutron stars
description We present a comprehensive study of the relation between radio and X-ray emission in neutron star (NS) X-ray binaries, use this to infer the general properties of the disc-jet coupling in such systems and compare the results quantitatively with those already established for black hole (BH) systems. There are clear qualitative similarities between the two classes of object: hard states below about 1 per cent of the Eddington luminosity produce steady jets, while transient jets are associated with outbursting and variable sources at the highest luminosities. However, there are important quantitative differences: the NSs are less radio loud for a given X-ray luminosity (regardless of mass corrections) and they do not appear to show the strong suppression of radio emission in steady soft states that we observe in BH systems. Furthermore, in the hard states, the correlation between radio and X-ray luminosities of the NS systems is steeper than the relation observed in BHs by about a factor of 2. This result strongly suggests that the X-ray emission in the BH systems is radiatively inefficient, with an approximate relation of the form Graphic, consistent with both advection-dominated models and the jet-dominated scenario. In contrast, the jet power in both classes of object scales linearly with accretion rate. This constitutes some of the first observational evidence for the radiatively inefficient scaling of X-ray luminosity with accretion rate in accreting BH systems. Moreover, based on simultaneous radio/X-ray observations of Z-type NSs (the brightest of our Galaxy, always near or at the Eddington accretion rate), we draw a model that can describe the disc-jet coupling in such sources, finding a possible association between a particular X-ray state transition [horizontal branch to normal branch] and the emission of transient jets.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/99491
url https://hdl.handle.net/2445/99491
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1111/j.1365-2966.2005.09777.x
Monthly Notices of the Royal Astronomical Society, 2006, vol. 366, num. 1, p. 79-91
http://dx.doi.org/10.1111/j.1365-2966.2005.09777.x
dc.rights.none.fl_str_mv (c) Migliari, Simone et al., 2006
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Migliari, Simone et al., 2006
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Astronomical Society
publisher.none.fl_str_mv Royal Astronomical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406608783572993
score 15,300719

Registos relacionados