First EVLA radio observations towards two TeV sources: HESS J1809-193 and HESS J1825-137

CASTELLETTI G., GIACANI E., DUBNER G.

Mar del Plata

Congreso; 55a Reunión Anual de la Asociación Argentina de Astronomía; 2012

Instituto Argentino de Radioastronomía

We report on the first Jansky (Expanded) Very Large Array (JVLA) radio observations at 1.4 GHz towards two gamma-ray sources: HESS J1809-193 and HESS J1825-137. These TeV sources have beenassociated with two young pulsars PSR J1809-1917 and PSR J1826-1334,which in turn power pulsar wind nebulae (PWNe) detected in the X-raydomain. For HESS J1825-137, the new radio image reveals faint ex-tended emission around the pulsar, which might be interpreted as theradio counterpart of the PWN observed in X-ray. On the contrary, for HESS J1809-193 the radio image does not show any evidence of a radioPWN down to a noise level of 0.09 mJy/beam.