A study of the association of Fermi sources with massive young galactic objects

Massive protostars have associated bipolar outflows that can produce strong shocks when they interact with the surrounding medium. At these shocks particles can be accelerated up to relativistic energies. Relativistic electrons and protons can then produce gamma-ray emission, as some theoretical mod...

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Detalles Bibliográficos
Autores: Munar i Adrover, Pere, Paredes i Poy, Josep Maria, Romero, Gustavo E.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/122716
Acceso en línea:https://hdl.handle.net/2445/122716
Access Level:acceso abierto
Palabra clave:Estels
Raigs gamma
Stars
Gamma rays
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spelling A study of the association of Fermi sources with massive young galactic objectsMunar i Adrover, PereParedes i Poy, Josep MariaRomero, Gustavo E.EstelsRaigs gammaStarsGamma raysMassive protostars have associated bipolar outflows that can produce strong shocks when they interact with the surrounding medium. At these shocks particles can be accelerated up to relativistic energies. Relativistic electrons and protons can then produce gamma-ray emission, as some theoretical models predict. To identify young galactic objects that may emit gamma rays, we crossed the Fermi First Year Catalog with some catalogs of known massive young stellar objects (MYSOs), early type stars, and OB associations, and we implemented Monte Carlo simulations to find the probability of chance coincidences. We obtained a list of massive MYSOs that are spatially coincident with Fermi sources. Our results indicate that \sim 70% of these candidates should be gamma-ray sources with a confidence of \sim 5{\sigma}. We studied the coincidences one by one to check the viability of these young sources as potential counterparts to Fermi sources and made a short list of best targets for new detailed multifrequency observations. The results for other type of young galactic objects are not conclusive.EDP Sciences2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/122716Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/201116580Astronomy & Astrophysics, 2011, vol. 530, num. A72https://doi.org/10.1051/0004-6361/201116580(c) The European Southern Observatory (ESO), 2011info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1227162026-05-27T06:46:51Z
dc.title.none.fl_str_mv A study of the association of Fermi sources with massive young galactic objects
title A study of the association of Fermi sources with massive young galactic objects
spellingShingle A study of the association of Fermi sources with massive young galactic objects
Munar i Adrover, Pere
Estels
Raigs gamma
Stars
Gamma rays
title_short A study of the association of Fermi sources with massive young galactic objects
title_full A study of the association of Fermi sources with massive young galactic objects
title_fullStr A study of the association of Fermi sources with massive young galactic objects
title_full_unstemmed A study of the association of Fermi sources with massive young galactic objects
title_sort A study of the association of Fermi sources with massive young galactic objects
dc.creator.none.fl_str_mv Munar i Adrover, Pere
Paredes i Poy, Josep Maria
Romero, Gustavo E.
author Munar i Adrover, Pere
author_facet Munar i Adrover, Pere
Paredes i Poy, Josep Maria
Romero, Gustavo E.
author_role author
author2 Paredes i Poy, Josep Maria
Romero, Gustavo E.
author2_role author
author
dc.subject.none.fl_str_mv Estels
Raigs gamma
Stars
Gamma rays
topic Estels
Raigs gamma
Stars
Gamma rays
description Massive protostars have associated bipolar outflows that can produce strong shocks when they interact with the surrounding medium. At these shocks particles can be accelerated up to relativistic energies. Relativistic electrons and protons can then produce gamma-ray emission, as some theoretical models predict. To identify young galactic objects that may emit gamma rays, we crossed the Fermi First Year Catalog with some catalogs of known massive young stellar objects (MYSOs), early type stars, and OB associations, and we implemented Monte Carlo simulations to find the probability of chance coincidences. We obtained a list of massive MYSOs that are spatially coincident with Fermi sources. Our results indicate that \sim 70% of these candidates should be gamma-ray sources with a confidence of \sim 5{\sigma}. We studied the coincidences one by one to check the viability of these young sources as potential counterparts to Fermi sources and made a short list of best targets for new detailed multifrequency observations. The results for other type of young galactic objects are not conclusive.
publishDate 2011
dc.date.none.fl_str_mv 2011
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/2445/122716
url https://hdl.handle.net/2445/122716
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/10.1051/0004-6361/201116580
Astronomy & Astrophysics, 2011, vol. 530, num. A72
https://doi.org/10.1051/0004-6361/201116580
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2011
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2011
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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