Massive protostars as gamma-ray sources.

Massive protostars have associated bipolar outflows with velocities of hundreds of km s-1. 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 a...

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Detalhes bibliográficos
Autores: Bosch i Ramon, Valentí, Romero, Gustavo E., Araudo, A. T., Paredes i Poy, Josep Maria
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2010
País:España
Recursos: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:2445/44384
Acesso em linha:https://hdl.handle.net/2445/44384
Access Level:acceso abierto
Palavra-chave:Estels
Formació d'estels
Raigs gamma
Radioastronomia
Stars
Star formation
Gamma rays
Radio astronomy
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repository_id_str
spelling Massive protostars as gamma-ray sources.Bosch i Ramon, ValentíRomero, Gustavo E.Araudo, A. T.Paredes i Poy, Josep MariaEstelsFormació d'estelsRaigs gammaRadioastronomiaStarsStar formationGamma raysRadio astronomyMassive protostars have associated bipolar outflows with velocities of hundreds of km s-1. 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 Fermi 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.Springer Verlag2013201320102013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion10 p.application/pdfhttps://hdl.handle.net/2445/44384Articles 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)InglésVersió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/200913488Astronomy and Astrophysics, 2010, vol. 511, num. A8http://dx.doi.org/10.1051/0004-6361/200913488(c) Springer Verlag, 2010info:eu-repo/semantics/openAccessoai:recercat.cat:2445/443842026-05-29T05:05:01Z
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 i Ramon, Valentí
Estels
Formació d'estels
Raigs gamma
Radioastronomia
Stars
Star formation
Gamma rays
Radio astronomy
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 i Ramon, Valentí
Romero, Gustavo E.
Araudo, A. T.
Paredes i Poy, Josep Maria
author Bosch i Ramon, Valentí
author_facet Bosch i Ramon, Valentí
Romero, Gustavo E.
Araudo, A. T.
Paredes i Poy, Josep Maria
author_role author
author2 Romero, Gustavo E.
Araudo, A. T.
Paredes i Poy, Josep Maria
author2_role author
author
author
dc.subject.none.fl_str_mv Estels
Formació d'estels
Raigs gamma
Radioastronomia
Stars
Star formation
Gamma rays
Radio astronomy
topic Estels
Formació d'estels
Raigs gamma
Radioastronomia
Stars
Star formation
Gamma rays
Radio astronomy
description Massive protostars have associated bipolar outflows with velocities of hundreds of km s-1. 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 Fermi 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
2013
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/44384
url https://hdl.handle.net/2445/44384
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/200913488
Astronomy and Astrophysics, 2010, vol. 511, num. A8
http://dx.doi.org/10.1051/0004-6361/200913488
dc.rights.none.fl_str_mv (c) Springer Verlag, 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Springer Verlag, 2010
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 10 p.
application/pdf
dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
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)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,808905

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