Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20910521s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #105.21; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
The submillimeter opacity is a prominent source of uncertainty in mass estimates and in determination of the physical structure of low-mass star-forming cores. As part of a larger effort with the Cores to Disk Spitzer Legacy team (c2d) to better constrain the dust opacity in these dense cores, we have directly compared deep near-IR observations from HST NICMOS and the NTT with Spitzer Space Telescope mid-IR and SCUBA submillimeter observations of the Class 0 protostellar core B335 and starless core L694-2. We develop a new method to constrain the dust opacity at 850 and 450 microns vs. 2.2 microns that accounts for the variations of density and temperature along the stellar lines-of-sight. The opacity ratio is used to constrain a new dust model (Pontoppidan et al.) appropriate for dense, low-mass cores and the new dust model is used to update the physical model of B335.
Evans Neal J. II
Huard Tracy L.
Mundy Lee G.
Pontoppidan Klaus Martin
Shirley Yancy L.
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