VLA DETECTION OF THE EXCITING SOURCES OF HH-83, HH-117, HH-124, HH-192, HH-300, HH-366, AND HH-375

We present sensitive VLA observations at 3.6 cm of nine fields contain ing Herbig-Haro objects. In 7 out of the 9 observed fields we detect r adio sources inside the error ellipsoid of the IRAS source that is bel ieved to be exciting the outflow: RH 366 in B5, HH 300 in B18w, HR 192 in L1527, HH 83 in L1641, HH 117 in L1598, HH 124 near NGC 2264 and H H 375 in L1157. These radio sources are quite likely thermal jets prod uced by the stars that excite the region. In the case of IRAS 04368+25 57 we made a map of higher angular resolution at 2 cm that shows that the source is elongated in the direction of the molecular outflow in t he region, confirming its nature as a thermal jet. For two flows, HH 3 76 in L1152 and HH 363 in L1221, we did not detect any radio source co inciding with the infrared driving source. When these results are comb ined with previous sensitive observations, we conclude that most HR en ergy sources can be detected at 3.6 cm in surveys reaching rms noise l evels of about 20 mu y.