Massive protostars as gamma-ray sources

Context. Massive protostars have associated bipolar outflows with velocities of hundreds of km s<SUP>-1</SUP>. Such outflows can produce strong shocks when they interact with the ambient medium leading to regions of nonthermal radio emission. Aims. We aim at exploring under which conditi...

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Detalles Bibliográficos
Autores: Bosch Ramon, V., Romero, Gustavo Esteban, Araudo, Anabella Teresa, Paredes, J. M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/82510
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82510
Access Level:acceso abierto
Palabra clave:Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/82510
network_acronym_str AR
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repository_id_str
spelling Massive protostars as gamma-ray sourcesBosch Ramon, V.Romero, Gustavo EstebanAraudo, Anabella TeresaParedes, J. M.Ciencias AstronómicasStars: formationGamma rays: starsStars: early-typeISM: cloudsContext. Massive protostars have associated bipolar outflows with velocities of hundreds of km s<SUP>-1</SUP>. Such outflows can produce strong shocks when they interact with the ambient medium leading to regions of nonthermal radio emission. Aims. We aim at exploring under which conditions relativistic particles are accelerated at the terminal shocks of the protostellar jets and whether they can produce significant gamma-ray emission. Methods. We estimate the conditions necessary for particle acceleration up to very high energies and gamma-ray production in the nonthermal hot spots of jets associated with massive protostars embedded in dense molecular clouds. Results. We show that relativistic bremsstrahlung and proton-proton collisions can make molecular clouds with massive young stellar objects detectable by the <i>Fermi</i> satellite at MeV-GeV energies and by Cherenkov telescope arrays in the GeV-TeV range. Conclusions. Gamma-ray astronomy can be used to probe the physical conditions in star-forming regions and particle acceleration processes in the complex environment of massive molecular clouds.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/10915/82510enginfo:eu-repo/semantics/altIdentifier/issn/00046361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200913488info: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:UNLP2024-05-08T12:53:34Zoai:sedici.unlp.edu.ar:10915/82510Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:53:34.75SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Massive protostars as gamma-ray sources
title Massive protostars as gamma-ray sources
spellingShingle Massive protostars as gamma-ray sources
Bosch Ramon, V.
Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
title_short Massive protostars as gamma-ray sources
title_full Massive protostars as gamma-ray sources
title_fullStr Massive protostars as gamma-ray sources
title_full_unstemmed Massive protostars as gamma-ray sources
title_sort Massive protostars as gamma-ray sources
dc.creator.none.fl_str_mv Bosch Ramon, V.
Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
author Bosch Ramon, V.
author_facet Bosch Ramon, V.
Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
author_role author
author2 Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
topic Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
description Context. Massive protostars have associated bipolar outflows with velocities of hundreds of km s<SUP>-1</SUP>. Such outflows can produce strong shocks when they interact with the ambient medium leading to regions of nonthermal radio emission. Aims. We aim at exploring under which conditions relativistic particles are accelerated at the terminal shocks of the protostellar jets and whether they can produce significant gamma-ray emission. Methods. We estimate the conditions necessary for particle acceleration up to very high energies and gamma-ray production in the nonthermal hot spots of jets associated with massive protostars embedded in dense molecular clouds. Results. We show that relativistic bremsstrahlung and proton-proton collisions can make molecular clouds with massive young stellar objects detectable by the <i>Fermi</i> satellite at MeV-GeV energies and by Cherenkov telescope arrays in the GeV-TeV range. Conclusions. Gamma-ray astronomy can be used to probe the physical conditions in star-forming regions and particle acceleration processes in the complex environment of massive molecular clouds.
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
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/82510
url http://sedici.unlp.edu.ar/handle/10915/82510
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/00046361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200913488
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
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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