DISCOVERY OF HERBIG-HARO OBJECTS AND MOLECULAR-HYDROGEN JETS NEAR BOKGLOBULE CB-34

We report the discovery of four new Herbig-Haro objects (HH 290S, HH 2 90N1, HH 290N2, and HH 291) and molecular hydrogen jets associated wit h the star formation activity seen in Bok globule CB 34. The HH object s were discovered in narrowband [S II] and H alpha CCD images. Two of these objects are also seen in a corresponding 2.12 mu m upsilon = 1-0 S(1) H-2, near-infrared image confirming their shock emission nature. These objects are likely to be driven by an embedded near-infrared so urce belonging to the aggregate of young stellar objects recently foun d by Alves & Yun. Additional shock emission features appear in the mol ecular hydrogen image. We identify two sets of infrared structures ext ending for about 0.15 pc and toward the region of highest extinction i n the cloud. The features in each set are well aligned and are likely to trace the presence of embedded jets with high degrees of collimatio n. Taken together, these features delineate three separate chains of s hock-excited nebulae. One chain is seen in both the optical and near-i nfrared images. Of the other two chains, one is seen partly in the opt ical and partly in the infrared, and the other is seen only in the inf rared images.