Detection of nonthermal emission from the bow shock of a massive runaway star
- Autores
- Benaglia, Paula; Romero, Gustavo Esteban; Martí, J.; Peri, Cintia Soledad; Araudo, Anabella Teresa
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. The environs of massive, early-type stars have been inspected in recent years in the search for sites where particles can be accelerated up to relativistic energies. Wind regions of massive binaries that collide have already been established as sources of high-energy emission; however, there is a different scenario for massive stars where strong shocks can also be produced: the bow-shaped region of matter piled up by the action of the stellar strong wind of a runaway star interacting with the interstellar medium. Aims. We study the bow-shock region produced by a very massive runaway star, BD+43°3654, to look for nonthermal radio emission as evidence of a relativistic particle population. Methods. We observed the field of BD+43°3654 at two frequencies, 1.42 and 4.86 GHz, with the Very Large Array (VLA), and obtained a spectral index map of the radio emission. Results. We have detected, for the first time, nonthermal radio emission from the bow shock of a massive runaway star. Conclusions. After analyzing the radiative mechanisms that can be at work, we conclude that the region under study could produce enough relativistic particles whose radiation might be detectable by forthcoming gamma-ray instruments, like CTA North.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Infrared: stars
Radio continuum: general
Stars: early-type
Stars: individual: BD+43°3654
Infrared: star
Stars: early-type - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/82448
Ver los metadatos del registro completo
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Detection of nonthermal emission from the bow shock of a massive runaway starBenaglia, PaulaRomero, Gustavo EstebanMartí, J.Peri, Cintia SoledadAraudo, Anabella TeresaCiencias AstronómicasInfrared: starsRadio continuum: generalStars: early-typeStars: individual: BD+43°3654Infrared: starStars: early-typeContext. The environs of massive, early-type stars have been inspected in recent years in the search for sites where particles can be accelerated up to relativistic energies. Wind regions of massive binaries that collide have already been established as sources of high-energy emission; however, there is a different scenario for massive stars where strong shocks can also be produced: the bow-shaped region of matter piled up by the action of the stellar strong wind of a runaway star interacting with the interstellar medium. Aims. We study the bow-shock region produced by a very massive runaway star, BD+43°3654, to look for nonthermal radio emission as evidence of a relativistic particle population. Methods. We observed the field of BD+43°3654 at two frequencies, 1.42 and 4.86 GHz, with the Very Large Array (VLA), and obtained a spectral index map of the radio emission. Results. We have detected, for the first time, nonthermal radio emission from the bow shock of a massive runaway star. Conclusions. After analyzing the radiative mechanisms that can be at work, we conclude that the region under study could produce enough relativistic particles whose radiation might be detectable by forthcoming gamma-ray instruments, like CTA North.Facultad de Ciencias Astronómicas y Geofísicas2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/82448enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201015232info: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:UNLP2025-09-29T11:15:31Zoai:sedici.unlp.edu.ar:10915/82448Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:31.263SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Detection of nonthermal emission from the bow shock of a massive runaway star |
title |
Detection of nonthermal emission from the bow shock of a massive runaway star |
spellingShingle |
Detection of nonthermal emission from the bow shock of a massive runaway star Benaglia, Paula Ciencias Astronómicas Infrared: stars Radio continuum: general Stars: early-type Stars: individual: BD+43°3654 Infrared: star Stars: early-type |
title_short |
Detection of nonthermal emission from the bow shock of a massive runaway star |
title_full |
Detection of nonthermal emission from the bow shock of a massive runaway star |
title_fullStr |
Detection of nonthermal emission from the bow shock of a massive runaway star |
title_full_unstemmed |
Detection of nonthermal emission from the bow shock of a massive runaway star |
title_sort |
Detection of nonthermal emission from the bow shock of a massive runaway star |
dc.creator.none.fl_str_mv |
Benaglia, Paula Romero, Gustavo Esteban Martí, J. Peri, Cintia Soledad Araudo, Anabella Teresa |
author |
Benaglia, Paula |
author_facet |
Benaglia, Paula Romero, Gustavo Esteban Martí, J. Peri, Cintia Soledad Araudo, Anabella Teresa |
author_role |
author |
author2 |
Romero, Gustavo Esteban Martí, J. Peri, Cintia Soledad Araudo, Anabella Teresa |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Infrared: stars Radio continuum: general Stars: early-type Stars: individual: BD+43°3654 Infrared: star Stars: early-type |
topic |
Ciencias Astronómicas Infrared: stars Radio continuum: general Stars: early-type Stars: individual: BD+43°3654 Infrared: star Stars: early-type |
dc.description.none.fl_txt_mv |
Context. The environs of massive, early-type stars have been inspected in recent years in the search for sites where particles can be accelerated up to relativistic energies. Wind regions of massive binaries that collide have already been established as sources of high-energy emission; however, there is a different scenario for massive stars where strong shocks can also be produced: the bow-shaped region of matter piled up by the action of the stellar strong wind of a runaway star interacting with the interstellar medium. Aims. We study the bow-shock region produced by a very massive runaway star, BD+43°3654, to look for nonthermal radio emission as evidence of a relativistic particle population. Methods. We observed the field of BD+43°3654 at two frequencies, 1.42 and 4.86 GHz, with the Very Large Array (VLA), and obtained a spectral index map of the radio emission. Results. We have detected, for the first time, nonthermal radio emission from the bow shock of a massive runaway star. Conclusions. After analyzing the radiative mechanisms that can be at work, we conclude that the region under study could produce enough relativistic particles whose radiation might be detectable by forthcoming gamma-ray instruments, like CTA North. Facultad de Ciencias Astronómicas y Geofísicas |
description |
Context. The environs of massive, early-type stars have been inspected in recent years in the search for sites where particles can be accelerated up to relativistic energies. Wind regions of massive binaries that collide have already been established as sources of high-energy emission; however, there is a different scenario for massive stars where strong shocks can also be produced: the bow-shaped region of matter piled up by the action of the stellar strong wind of a runaway star interacting with the interstellar medium. Aims. We study the bow-shock region produced by a very massive runaway star, BD+43°3654, to look for nonthermal radio emission as evidence of a relativistic particle population. Methods. We observed the field of BD+43°3654 at two frequencies, 1.42 and 4.86 GHz, with the Very Large Array (VLA), and obtained a spectral index map of the radio emission. Results. We have detected, for the first time, nonthermal radio emission from the bow shock of a massive runaway star. Conclusions. After analyzing the radiative mechanisms that can be at work, we conclude that the region under study could produce enough relativistic particles whose radiation might be detectable by forthcoming gamma-ray instruments, like CTA North. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/82448 |
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http://sedici.unlp.edu.ar/handle/10915/82448 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201015232 |
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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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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