Computer Science
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50668h&link_type=abstract
Spitzer Proposal ID #50668
Computer Science
Scientific paper
We propose to use spatially-resolved imaging and spectroscopic data from Spitzer, combined with longer-wavelength studies, to develop a comprehensive picture of protostellar envelopes for a sample of young stellar objects. Radiative transfer modeling will allow us to explore the following questions: Do infalling envelopes generally form inner toroids in addition to more flattened disks, as predicted by some models with strong magnetic fields? Are most protostellar disks bright in the IRAC range, indicating rapid disk accretion in early stellar evolution? Do envelopes generally have high-albedo, i.e., larger grains? What is the nature of the interface between the infalling envelope and the cavity-producing outflow? The sample of protostars to be studied will enable us to examine whether envelope properties depend upon protostellar luminosity and/or environment. Our models will also have long-term utility, in that we will make predictions for future sub-mm and mm-wave interferometric observations constraining envelope chemistry, kinematics, and outflow-inflow interactions. This study will provide fundamental insights into protostellar collapse in particular and star formation in general.
Calvet Nuria
Furlan Elise
Hartmann Lee
Tobin John J.
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