Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4

Autores
Prajapati, Prachi; Tej, Anandmayee; del Palacio, Santiago; Benaglia, Paula; Ishwara Chandra, C. H.; Vig, Sarita; Mandal, Samir; Ghosh, Swarna Kanti
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The supersonic winds produced by massive stars carry a large amount of kinetic power. In numerous scenarios such winds have been proven to produce shocks in which relativistic particles are accelerated emitting nonthermal (NT) radiation. Here, we report the first detection of NT emission from a single stellar bubble, G2.4+1.4, associated with a WO star. We observed this source with the upgraded Giant Meterwave Radio Telescope in Band 4 (550-850 MHz) and Band 5 (1050-1450 MHz). We present intensity and spectral index maps for this source that are consistent with synchrotron emission (average spectral index, α = -0.83 ± 0.10). The fraction of the available kinetic wind power that is converted into cosmic-ray acceleration is estimated to be of the order of a few percent. This finding constitutes an observational breakthrough and gives new insight on the NT physical processes taking place in the environments of isolated massive stars. In particular, our results show that non-runaway isolated massive stars are capable of accelerating relativistic particles and are therefore confirmed as sources of Galactic cosmic rays.
Fil: Prajapati, Prachi. Indian Institute Of Space Science And Technology; India
Fil: Tej, Anandmayee. Indian Institute Of Space Science And Technology; India
Fil: del Palacio, Santiago. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics; India
Fil: Vig, Sarita. Indian Institute Of Space Science And Technology; India
Fil: Mandal, Samir. Indian Institute Of Space Science And Technology; India
Fil: Ghosh, Swarna Kanti. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
Materia
WOLF-RAYET STARS
STELLAR WIND BUBBLES
INTERSTELLAR MEDIUM
RADIO CONTINUUM EMISSION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/106374
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4Prajapati, PrachiTej, Anandmayeedel Palacio, SantiagoBenaglia, PaulaIshwara Chandra, C. H.Vig, SaritaMandal, SamirGhosh, Swarna KantiWOLF-RAYET STARSSTELLAR WIND BUBBLESINTERSTELLAR MEDIUMRADIO CONTINUUM EMISSIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The supersonic winds produced by massive stars carry a large amount of kinetic power. In numerous scenarios such winds have been proven to produce shocks in which relativistic particles are accelerated emitting nonthermal (NT) radiation. Here, we report the first detection of NT emission from a single stellar bubble, G2.4+1.4, associated with a WO star. We observed this source with the upgraded Giant Meterwave Radio Telescope in Band 4 (550-850 MHz) and Band 5 (1050-1450 MHz). We present intensity and spectral index maps for this source that are consistent with synchrotron emission (average spectral index, α = -0.83 ± 0.10). The fraction of the available kinetic wind power that is converted into cosmic-ray acceleration is estimated to be of the order of a few percent. This finding constitutes an observational breakthrough and gives new insight on the NT physical processes taking place in the environments of isolated massive stars. In particular, our results show that non-runaway isolated massive stars are capable of accelerating relativistic particles and are therefore confirmed as sources of Galactic cosmic rays.Fil: Prajapati, Prachi. Indian Institute Of Space Science And Technology; IndiaFil: Tej, Anandmayee. Indian Institute Of Space Science And Technology; IndiaFil: del Palacio, Santiago. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics; IndiaFil: Vig, Sarita. Indian Institute Of Space Science And Technology; IndiaFil: Mandal, Samir. Indian Institute Of Space Science And Technology; IndiaFil: Ghosh, Swarna Kanti. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; EspañaIOP Publishing2019-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/106374Prajapati, Prachi; Tej, Anandmayee; del Palacio, Santiago; Benaglia, Paula; Ishwara Chandra, C. H.; et al.; Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4; IOP Publishing; Astrophysical Journal; 884; 2; 10-2019; 1-72041-8213CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/2041-8213/ab4992info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/ab4992info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:38Zoai:ri.conicet.gov.ar:11336/106374instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:33:38.626CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
title Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
spellingShingle Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
Prajapati, Prachi
WOLF-RAYET STARS
STELLAR WIND BUBBLES
INTERSTELLAR MEDIUM
RADIO CONTINUUM EMISSION
title_short Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
title_full Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
title_fullStr Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
title_full_unstemmed Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
title_sort Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4
dc.creator.none.fl_str_mv Prajapati, Prachi
Tej, Anandmayee
del Palacio, Santiago
Benaglia, Paula
Ishwara Chandra, C. H.
Vig, Sarita
Mandal, Samir
Ghosh, Swarna Kanti
author Prajapati, Prachi
author_facet Prajapati, Prachi
Tej, Anandmayee
del Palacio, Santiago
Benaglia, Paula
Ishwara Chandra, C. H.
Vig, Sarita
Mandal, Samir
Ghosh, Swarna Kanti
author_role author
author2 Tej, Anandmayee
del Palacio, Santiago
Benaglia, Paula
Ishwara Chandra, C. H.
Vig, Sarita
Mandal, Samir
Ghosh, Swarna Kanti
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv WOLF-RAYET STARS
STELLAR WIND BUBBLES
INTERSTELLAR MEDIUM
RADIO CONTINUUM EMISSION
topic WOLF-RAYET STARS
STELLAR WIND BUBBLES
INTERSTELLAR MEDIUM
RADIO CONTINUUM EMISSION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The supersonic winds produced by massive stars carry a large amount of kinetic power. In numerous scenarios such winds have been proven to produce shocks in which relativistic particles are accelerated emitting nonthermal (NT) radiation. Here, we report the first detection of NT emission from a single stellar bubble, G2.4+1.4, associated with a WO star. We observed this source with the upgraded Giant Meterwave Radio Telescope in Band 4 (550-850 MHz) and Band 5 (1050-1450 MHz). We present intensity and spectral index maps for this source that are consistent with synchrotron emission (average spectral index, α = -0.83 ± 0.10). The fraction of the available kinetic wind power that is converted into cosmic-ray acceleration is estimated to be of the order of a few percent. This finding constitutes an observational breakthrough and gives new insight on the NT physical processes taking place in the environments of isolated massive stars. In particular, our results show that non-runaway isolated massive stars are capable of accelerating relativistic particles and are therefore confirmed as sources of Galactic cosmic rays.
Fil: Prajapati, Prachi. Indian Institute Of Space Science And Technology; India
Fil: Tej, Anandmayee. Indian Institute Of Space Science And Technology; India
Fil: del Palacio, Santiago. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics; India
Fil: Vig, Sarita. Indian Institute Of Space Science And Technology; India
Fil: Mandal, Samir. Indian Institute Of Space Science And Technology; India
Fil: Ghosh, Swarna Kanti. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; España
description The supersonic winds produced by massive stars carry a large amount of kinetic power. In numerous scenarios such winds have been proven to produce shocks in which relativistic particles are accelerated emitting nonthermal (NT) radiation. Here, we report the first detection of NT emission from a single stellar bubble, G2.4+1.4, associated with a WO star. We observed this source with the upgraded Giant Meterwave Radio Telescope in Band 4 (550-850 MHz) and Band 5 (1050-1450 MHz). We present intensity and spectral index maps for this source that are consistent with synchrotron emission (average spectral index, α = -0.83 ± 0.10). The fraction of the available kinetic wind power that is converted into cosmic-ray acceleration is estimated to be of the order of a few percent. This finding constitutes an observational breakthrough and gives new insight on the NT physical processes taking place in the environments of isolated massive stars. In particular, our results show that non-runaway isolated massive stars are capable of accelerating relativistic particles and are therefore confirmed as sources of Galactic cosmic rays.
publishDate 2019
dc.date.none.fl_str_mv 2019-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/106374
Prajapati, Prachi; Tej, Anandmayee; del Palacio, Santiago; Benaglia, Paula; Ishwara Chandra, C. H.; et al.; Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4; IOP Publishing; Astrophysical Journal; 884; 2; 10-2019; 1-7
2041-8213
CONICET Digital
CONICET
url http://hdl.handle.net/11336/106374
identifier_str_mv Prajapati, Prachi; Tej, Anandmayee; del Palacio, Santiago; Benaglia, Paula; Ishwara Chandra, C. H.; et al.; Investigating Particle Acceleration in the Wolf–Rayet Bubble G2.4+1.4; IOP Publishing; Astrophysical Journal; 884; 2; 10-2019; 1-7
2041-8213
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/2041-8213/ab4992
info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/ab4992
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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