Aste submillimeter observations of a young stellar object condensation in Cederblad 110

作者：Hiramatsu Masaaki^*; Hayakawa Takahiro; Tatematsu Ken'ichi; Kamegai Kazuhisa; Onishi Toshikazu; Mizuno Akira; Yamaguchi Nobuyuki; Hasegawa Tetsuo

来源：Astrophysical Journal, 2007, 664(2): 964-974.

DOI：10.1086/519269

• ISM : clouds
• ISM : jets and outflows
• stars : formation
• stars : individual (Ced 110 IRS 4, Cha-MMS 1)
• stars : low-mass, brown dwarfs
• stars : pre-main-sequence

We present results of submillimeter observations of a low- mass young stellar object (YSO) condensation in the Cederblad 110 region of the Chamaeleon I dark cloud with the Atacama Submillimeter Telescope Experiment. Our HCO+(J = 4-3) map reveals a dense molecular gas with an extent of similar to 0.1 pc, which is a complex of two envelopes associated with class I sources Ced 110 IRS 4 and IRS 11 and a very young object Cha-MMS 1. The other two class I sources in this region, IRS 6 and NIR 89, are located outside the clump and have no extended HCO+ emission. HCO+ abundance is calculated to be 2.6x10(-10) for MMS 1 and 3.4x10(-9) for IRS 4, which are comparable to the reported value for other young sources. Bipolar outflows from IRS 4 and IRS 6 are detected in our (CO)-C-12(J = 3-2) map. The outflow from IRS 4 seems to collide with Cha- MMS 1. The outflow has enough momentum to affect gas motion in MMS 1, although no sign has been detected to indicate that a triggered star formation has occurred.

• 出版日期2007-8-1
• 单位中国科学院国家天文台