INVESTIGADORES
ROMERO Gustavo Esteban
artículos
Título:
A study of the association of Fermi sources with massive young galactic objects
Autor/es:
MUNAR ADROVER, PERE; PAREDES, JOSEP M.; ROMERO, GUSTAVO E
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2011 vol. 530 p. 1 - 10
ISSN:
0004-6361
Resumen:
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 ~70% of these candidates should be gamma-ray
sources with a confidence of ~5σ. 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.