Shock-excited H[TINF]2[/TINF] Flows in OMC-2 and OMC-3

摘要: We report the discovery of nearly a dozen collimated outflows from young stellar objects embedded in molecular filament that extends north Orion Nebula towards H II region NGC 1977. The large number coeval and class 0 indicates OMC-2/3 is one most active sites ongoing low- to intermediate-mass star formation known. These were identified 2.12 μm v = 1-0 S(1) H2 line during survey 6' × 16' containing OMC-2 OMC-3 cloud cores over recently discovered protostars. also observe filamentary emission likely trace possible fluorescent photodissociation regions associated with M43 Neither suspected nor are seen at continuum wavelength 2.14 μm, which confirms their emission-line nature. Several new flows bipolar outflows. However, prominent CO outflow (the MMS 8 flow) has no clear counterpart. consist chains knots compact bow shocks highly protostellar jets. Our more than 80 individual H2-emitting demonstrate stars churning this cloud.