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Tracing the Mass during Low-Mass Star Formation. III. Models of the Submillimeter Dust Continuum Emission from Class 0 Protostars
Yancy L. Shirley, Neal J. Evans, Jonathan M. C. Rawlings
Seven Class 0 sources mapped with SCUBA at 850 and 450 micron are modeled using a one dimensional radiative transfer code. The modeling takes into account heating from an internal…
Photon Dominated Regions in Low UV Fields: A Study of The Peripheral Region of L1204/S140
Wenbin Li, Neal J. Evans, Daniel T. Jaffe +2
We have carried out an in-depth study of the peripheral region of the molecular cloud L1204/S140, where the far ultraviolet radiation and the density are relatively low. Our observ…
Tracing the Mass during Low-Mass Star Formation. I. Submillimeter Continuum Observations
Yancy L. Shirley, Neal J. Evans, Jonathan M. C. Rawlings +1
We have obtained 850 and 450 micron continuum maps of 21 low mass cores with SED's ranging from pre-protostellar to Class I (18K < Tbol < 370K), using SCUBA at the JCMT. In this pa…
Atomic Carbon Is a Temperature Probe in Dark Clouds
K. Tatematsu, D. T. Jaffe, R. Plume +2
We have mapped the C I 3P1-3P0 line at 492 GHzin three molecular clouds immersed in weak ultraviolet radiation fields, TMC-1, L134N, and IC 5146. In all three clouds, the CI peak T…
New Protostellar Collapse Candidates: An HCO+ Survey of the Class 0 Sources
Erik M. Gregersen, Neal J. Evans, Shudong Zhou +1
We have observed 23 Class 0 sources in the HCO+ J=4-3 and 3-2 lines. The mean bolometric temperature of the 16 sources with well-determined values is 44 K and the mean luminosity i…