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 condi...

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Detalles Bibliográficos
Autores principales: Bosch Ramon, V., Romero, Gustavo Esteban, Araudo, Anabella Teresa, Paredes, J. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82510
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82510
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
spellingShingle Ciencias Astronómicas
Stars: formation
Gamma rays: stars
Stars: early-type
ISM: clouds
Bosch Ramon, V.
Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
Massive protostars as gamma-ray sources
topic_facet 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.
format Articulo
Articulo
author Bosch Ramon, V.
Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
author_facet Bosch Ramon, V.
Romero, Gustavo Esteban
Araudo, Anabella Teresa
Paredes, J. M.
author_sort Bosch Ramon, V.
title Massive protostars as gamma-ray sources
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
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82510
work_keys_str_mv AT boschramonv massiveprotostarsasgammaraysources
AT romerogustavoesteban massiveprotostarsasgammaraysources
AT araudoanabellateresa massiveprotostarsasgammaraysources
AT paredesjm massiveprotostarsasgammaraysources
bdutipo_str Repositorios
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