A Burst of Herbig-Haro Flows in NGC 1333

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Abstract
We report the discovery of over 20 groups of new Herbig-Haro (HH) objects in the NGC 1333 region of the Perseus molecular cloud, including some highly collimated jets. Our images contain over 30 groups of HH objects driven by over a dozen active outflow sources. Several of the new jets appear to be driven by optically visible stars, including HH 333, HH 334, and possibly HH 335 and HH 336. A spectacular jet, HH 333, lies nearly in the plane of the sky and has a length-to-width ratio exceeding 100 and may exhibit S-shaped point symmetry about a faint Hα emission-line star. HH 336 is located toward the cloud edge and is also centered on a visible star. A large number of new HH objects lie to the south of the concentration of known young stellar objects near SVS 13. We use published millimeter-wavelength CO and near-infrared H2 maps and images to associate HH objects, H2 emitting shocks, and CO outflows with more than a dozen potential driving sources. The high density of objects results in source confusion that limits the extent to which this can be done. Some HH objects are seen toward low-extinction regions far from the opaque cloud cores and may trace parts of parsec scale outflows from embedded sources. The large number of collisionally excited nebulae in this young stellar cluster requires a nearly coeval microburst of star formation.