A New Look at CO Outflows in the Dark Cloud Complex near IC 5146

Abstract

Abstract This paper presents the results of a search for CO outflows in a dark cloud complex near IC 5146 carried out using the 45-m telescope at Nobeyama Radio Observatory ($\mathrm{HPBW} = 17^{\prime\prime}$) equipped with the S115Q multi-beam receiver system. A CO outflow was discovered by the present survey toward IRAS 21428$+$4732, whose physical parameters, such as molecular mass, mechanical momentum, and kinetic energy, were derived. In addition to IRAS 21428$+$4732, there are 5 other IRAS point sources accompanied by CO outflows in this cloud complex, which were found by earlier observations with lower angular resolutions ($\mathrm{HPBW} \simeq 1^\prime$). We also made 12 CO ($J = 1-0$), 13CO ($J = 1-0$), and C18O ($J = 1-0$ observations toward the 5 sources with the 45-m telescope in order to obtain new data with higher angular resolutions. CO maps as well as physical parameters of these outflows obtained by the 45-m telescope are also presented.