The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656
MWC 656 is the first known Be/black hole (BH) binary system. Be/BH binaries are important in the context of binary system evolution and sources of detectable gravitational waves because they are possible precursors of coalescing neutron star/BH binaries. X-ray observations conducted in 2013 revealed...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/119792 |
| Acceso en línea: | https://hdl.handle.net/2445/119792 |
| Access Level: | acceso abierto |
| Palabra clave: | Forats negres (Astronomia) Estels binaris de raigs X Black holes (Astronomy) X-ray binaries |
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The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656Ribó Gomis, MarcMunar i Adrover, PereParedes i Poy, Josep MariaMarcote Martin, BenitoIwasawa, KazushiMoldón Vara, Francisco JavierCasares, J.Migliari, SimoneParedes Fortuny, XavierForats negres (Astronomia)Estels binaris de raigs XBlack holes (Astronomy)X-ray binariesMWC 656 is the first known Be/black hole (BH) binary system. Be/BH binaries are important in the context of binary system evolution and sources of detectable gravitational waves because they are possible precursors of coalescing neutron star/BH binaries. X-ray observations conducted in 2013 revealed that MWC 656 is a quiescent high-mass X-ray binary (HMXB), opening the possibility to explore X-ray/radio correlations and the accretion/ejection coupling down to low luminosities for BH HMXBs. Here we report on a deep joint Chandra/VLA observation of MWC 656 (and contemporaneous optical data) conducted in 2015 July that has allowed us to unambiguously identify the X-ray counterpart of the source. The X-ray spectrum can be fitted with a power law with Γ ~ 2, providing a flux of sime4 × 10−15 erg cm−2 s−1 in the 0.5-8 keV energy range and a luminosity of LX sime 3 × 1030 erg s−1 at a 2.6 kpc distance. For a 5 M⊙ BH this translates into sime5 × 10−9 LEdd. These results imply that MWC 656 is about 7 times fainter in X-rays than it was two years before and reaches the faintest X-ray luminosities ever detected in stellar-mass BHs. The radio data provide a detection with a peak flux density of 3.5 ± 1.1 μJy beam−1. The obtained X-ray/radio luminosities for this quiescent BH HMXB are fully compatible with those of the X-ray/radio correlations derived from quiescent BH low-mass X-ray binaries. These results show that the accretion/ejection coupling in stellar-mass BHs is independent of the nature of the donor star.Institute of Physics (IOP)2018201820172018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion6 p.application/pdfhttps://hdl.handle.net/2445/119792Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3847/2041-8213/835/2/L33Astrophysical Journal Letters, 2017, vol. 835, num. 2https://doi.org/10.3847/2041-8213/835/2/L33(c) American Astronomical Society, 2017info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1197922026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| title |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| spellingShingle |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 Ribó Gomis, Marc Forats negres (Astronomia) Estels binaris de raigs X Black holes (Astronomy) X-ray binaries |
| title_short |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| title_full |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| title_fullStr |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| title_full_unstemmed |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| title_sort |
The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656 |
| dc.creator.none.fl_str_mv |
Ribó Gomis, Marc Munar i Adrover, Pere Paredes i Poy, Josep Maria Marcote Martin, Benito Iwasawa, Kazushi Moldón Vara, Francisco Javier Casares, J. Migliari, Simone Paredes Fortuny, Xavier |
| author |
Ribó Gomis, Marc |
| author_facet |
Ribó Gomis, Marc Munar i Adrover, Pere Paredes i Poy, Josep Maria Marcote Martin, Benito Iwasawa, Kazushi Moldón Vara, Francisco Javier Casares, J. Migliari, Simone Paredes Fortuny, Xavier |
| author_role |
author |
| author2 |
Munar i Adrover, Pere Paredes i Poy, Josep Maria Marcote Martin, Benito Iwasawa, Kazushi Moldón Vara, Francisco Javier Casares, J. Migliari, Simone Paredes Fortuny, Xavier |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Forats negres (Astronomia) Estels binaris de raigs X Black holes (Astronomy) X-ray binaries |
| topic |
Forats negres (Astronomia) Estels binaris de raigs X Black holes (Astronomy) X-ray binaries |
| description |
MWC 656 is the first known Be/black hole (BH) binary system. Be/BH binaries are important in the context of binary system evolution and sources of detectable gravitational waves because they are possible precursors of coalescing neutron star/BH binaries. X-ray observations conducted in 2013 revealed that MWC 656 is a quiescent high-mass X-ray binary (HMXB), opening the possibility to explore X-ray/radio correlations and the accretion/ejection coupling down to low luminosities for BH HMXBs. Here we report on a deep joint Chandra/VLA observation of MWC 656 (and contemporaneous optical data) conducted in 2015 July that has allowed us to unambiguously identify the X-ray counterpart of the source. The X-ray spectrum can be fitted with a power law with Γ ~ 2, providing a flux of sime4 × 10−15 erg cm−2 s−1 in the 0.5-8 keV energy range and a luminosity of LX sime 3 × 1030 erg s−1 at a 2.6 kpc distance. For a 5 M⊙ BH this translates into sime5 × 10−9 LEdd. These results imply that MWC 656 is about 7 times fainter in X-rays than it was two years before and reaches the faintest X-ray luminosities ever detected in stellar-mass BHs. The radio data provide a detection with a peak flux density of 3.5 ± 1.1 μJy beam−1. The obtained X-ray/radio luminosities for this quiescent BH HMXB are fully compatible with those of the X-ray/radio correlations derived from quiescent BH low-mass X-ray binaries. These results show that the accretion/ejection coupling in stellar-mass BHs is independent of the nature of the donor star. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2018 2018 2018 |
| 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/2445/119792 |
| url |
https://hdl.handle.net/2445/119792 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://doi.org/10.3847/2041-8213/835/2/L33 Astrophysical Journal Letters, 2017, vol. 835, num. 2 https://doi.org/10.3847/2041-8213/835/2/L33 |
| dc.rights.none.fl_str_mv |
(c) American Astronomical Society, 2017 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
(c) American Astronomical Society, 2017 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
6 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| reponame_str |
Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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