Runaway stars as cosmic ray injectors inside molecular clouds

Giant molecular clouds (GMCs) are a new population of gamma-ray sources, being the target of cosmic rays (CRs) - locally accelerated or not. These clouds host very young stellar clusters where massive star formation takes place. Eventually, some of the stars are ejected from the clusters, becoming r...

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Detalles Bibliográficos
Autores principales: Valle, María Victoria del, Romero, Gustavo Esteban, Santos-Lima, R.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Cosmic rays
Gamma-rays: ISM
ISM: clouds
Radiation mechanisms: non-thermal
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85939
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85939
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
Cosmic rays
Gamma-rays: ISM
ISM: clouds
Radiation mechanisms: non-thermal
spellingShingle Ciencias Astronómicas
Cosmic rays
Gamma-rays: ISM
ISM: clouds
Radiation mechanisms: non-thermal
Valle, María Victoria del
Romero, Gustavo Esteban
Santos-Lima, R.
Runaway stars as cosmic ray injectors inside molecular clouds
topic_facet Ciencias Astronómicas
Cosmic rays
Gamma-rays: ISM
ISM: clouds
Radiation mechanisms: non-thermal
description Giant molecular clouds (GMCs) are a new population of gamma-ray sources, being the target of cosmic rays (CRs) - locally accelerated or not. These clouds host very young stellar clusters where massive star formation takes place. Eventually, some of the stars are ejected from the clusters, becoming runaway stars. These stars move supersonically through the cloud and develop bowshocks where particles can be accelerated up to relativistic energies. As a result, the bowshocks present non-thermal emission, and inject relativistic protons in the cloud. These protons diffuse in theGMCinteracting with the matter.We present a model for the non-thermal radiation generated by protons and secondary pairs accelerated in the bowshocks of massive runaway stars within young GMCs. We solve the transport equation for primary protons and secondary pairs as the stars move through the cloud.We present non-thermal emissivity maps in radio and in gamma-rays as a function of time. We obtain X-ray luminosities of the order of ~1032 erg s-1 and gamma-ray luminosities ~1034 erg s-1. We conclude that, under some assumptions, relativistic protons from massive runaway stars interacting with matter in GMCs give rise to extended non-thermal sources.
format Articulo
Articulo
author Valle, María Victoria del
Romero, Gustavo Esteban
Santos-Lima, R.
author_facet Valle, María Victoria del
Romero, Gustavo Esteban
Santos-Lima, R.
author_sort Valle, María Victoria del
title Runaway stars as cosmic ray injectors inside molecular clouds
title_short Runaway stars as cosmic ray injectors inside molecular clouds
title_full Runaway stars as cosmic ray injectors inside molecular clouds
title_fullStr Runaway stars as cosmic ray injectors inside molecular clouds
title_full_unstemmed Runaway stars as cosmic ray injectors inside molecular clouds
title_sort runaway stars as cosmic ray injectors inside molecular clouds
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/85939
work_keys_str_mv AT vallemariavictoriadel runawaystarsascosmicrayinjectorsinsidemolecularclouds
AT romerogustavoesteban runawaystarsascosmicrayinjectorsinsidemolecularclouds
AT santoslimar runawaystarsascosmicrayinjectorsinsidemolecularclouds
bdutipo_str Repositorios
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