INVESTIGADORES
COMBI Jorge Ariel
artículos
Título:
Detection of a new, low-brightness supernova remnant possibly associated with EGRET sources
Autor/es:
COMBI, J. A.; ROMERO, G. E.; BENAGLIA, P; JONAS, J.L.
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2001 vol. 366 p. 1047 - 1052
ISSN:
0004-6361
Resumen:
We report on the discovery of a shell-type supernova remnant in the
southern sky. It is a large ( ~ 8deg x 8deg),
low-brightness source with a nonthermal radio spectrum, which requires
background filtering to isolate it from the diffuse background emission
of the Galaxy. Three 3EG gamma -ray sources are spatially correlated
with the radio structure. We have made 21-cm line observations of the
region and found that two of these sources are coincident with HI
clouds. We propose that the gamma -ray emission is the result of
hadronic interactions between high-energy protons locally accelerated at
the remnant shock front and atomic nuclei in the ambient clouds.