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- W1480913986 abstract "We present the results of an observational study intothe molecular outflows and small scale ( ~ 1000 AU)envelope structure of a sample of nine low mass youngstellar objects (YSOs) in Taurus. The characteristicsof the outflows are derived from ^(12)CO J = 3 - 2 mappingwith the James Clerk Maxwell Telescope, whilethe envelopes are imaged in the HCO^+ 1-0, ^(13)CO 1-0 and C^(18)O 1-0 emission lines with the Owens ValleyMillimeter Array. Using dust envelope continuumfluxes at 1 mm as the basis for an evolutionary ordering,a picture emerges in which the mass, extent, andcollimation of outflows decreases over time as the envelopesbecome less massive, the opening angle of theoutflow cavity increases, and mass accretion throughthe disk slows down. On 1000 AU scales the HCO+and ^(13)CO/C^(18)O emission in the envelope is closely relatedto the outflow cavity, often outlining the cavitywalls. In addition, the envelopes are clumpy, and twosources appear surrounded by an incomplete ring ortorus, 1500-3000 AU in radius. The role of the outflowin shaping the small scale molecular emission maybe passive (creating a low-opacity pathway for heatingradiation) rather than, or in addition to, active (compressingand shock-heating the material)." @default.
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- W1480913986 date "1997-01-01" @default.
- W1480913986 modified "2023-09-27" @default.
- W1480913986 title "Molecular outflows and 1000 AU structure of low mass YSO envelopes" @default.
- W1480913986 hasPublicationYear "1997" @default.
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