| Multiple CO Outflows in Circinus: The Churning of a Molecular Cloud (2007) | |||||||||||||
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| We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For an assumed distance of 700 pc, the entire Circinus cloud is estimated to have a mass of about 5 \Theta 10 4 M fi . The opaque western portion that was mapped in this study has a mass of about 10 3 M fi , contains a number of embedded infrared sources and various compact 1.3 mm continuum sources, and has a remarkable filamentary structure with numerous cavities which appears to be the fossil remnants of past star formation activity. The most active star forming region in this part of Circinus is centered around a compact cluster of millimeter continuum sources associated with IRAS 14564--6254 and IRAS 14563--6301 which lies about 7 0 to the south. This region contains two known Herbig-Haro objects, HH 76 and HH 77, and a profusion of overlapping high velocity CO outflow lobes. Among th... | |||||||||||||
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