INVESTIGADORES
CASTELLETTI Gabriela Marta
congresos y reuniones científicas
Título:
Radio study of the recently discovered gamma-ray source SNR G353.6-0.7/HESSJ1731-347
Autor/es:
DUBNER G., GIACANI E., CASTELLETTI G.; TERRIER R., ACERO F.
Lugar:
Bremen
Reunión:
Simposio; 38th COSPAR Scientific Assembly; 2010
Resumen:
Until recently HESS J1731-347 was one of the dark sources discovered by
H.E.S.S. instrument for which no clear counterpart at other wavelengths
could be identified. Short time ago, how-ever, on the basis of
images from the radio Galactic Plane Survey carried out with the ATCA
and Parkes radiotelescopes at 1.4 GHz and with the Molonglo synthesis
instrument at 843 MHz,a faint non-thermal radio shell, the SNR
G353.6-0.7, was identified positionally coinciding with the brightest
hotspot of the TeV source HESS J1731-347. XMM-Newton observations
covering a fraction of the SNR revealed non-thermal X-ray emission that
most likely can be interpreted as synchrotron emission from high-energy
electrons accelerated by the SNR. This makes HESS J1731-347/G353.6-0.7 a
new object in the small but growing class of shell-type SNRs with TeV
emission, an important class because they can prove the role of SNRs as
cosmic accelerators. We report on a new radio study of this source
carried out using the Very Large Array (VLA, NRAO) at 1.4 GHz. We
present the results of a mosaic of 18 diferent VLA pointings covering
an area over 9 square degrees in size, along with a comparison with the
X-ray emission.