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Newly Discovered Herbig-Haro Objects in the NGC 2068 and NGC 2071 Regions

1999; Institute of Physics; Volume: 118; Issue: 3 Linguagem: Inglês

10.1086/301002

1538-3881

Bing Zhao, Min Wang, Ji Yang, Hongchi Wang, Licai Deng, Jun Yan, Jiansheng Chen,

Molecular Spectroscopy and Structure

Taking the advantage of the large field of view at the 60/90 cm Schmidt telescope of Beijing Astronomical Observatory, we were able to carry out a wide-field survey of Herbig-Haro (HH) objects in nearby star-forming regions, including Perseus, Taurus, Orion, and others. In a 58' × 58' field centered on NGC 2068 and NGC 2071 (M78), two active regions of star formation in the giant molecular cloud complex L1630, we found 17 HH objects exhibiting prominent [S II] emission but without continuum emission. Among these, we confirmed all the 11 known HH objects listed in the General Catalogue of Herbig-Haro Objects in this field. In addition, we discovered another six new HH objects, including HH 437, 438A–C, 440A/B, 442, 443, and 452A/B. These objects exhibit a variety of morphological structures, from knot to nebula. The discovery of these HH objects demonstrates strong activity of young stellar objects in the region we are studying. The large-scale spatial distribution of HH objects in the region is discussed by combination of our results and previous data.