Radiative Transfer Model Fitting of Hubble NICMOS Data for the Class I Protostar TMC-1A (IRAS 04365+2535)

Details Radiative Transfer Model Fitting of Hubble NICMOS Data for the Class I Protostar TMC-1A (IRAS 04365+2535) Radiative Transfer Model Fitting of Hubble NICMOS Data for the Class I Protostar TMC-1A (IRAS 04365+2535)

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20910509t&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #105.09; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present scattered light models of the class I protostar TMC-1A (IRAS 04365+2535) located in the Taurus star-forming region. In previous work we modelled the nearby source TMC-1 (IRAS 04381+2540) (Terebey et al. 2006, ApJ, 471, 308). This work compares results for the two class I protostars, based on high-spatial resolution Hubble Space Telescope NICMOS Data. The data are fit using a Monte Carlo scattering code to generate model simulations. Previous work has shown that the extended nebulosity seen around protostars at near-infrared wavelengths can be explained by stellar photons that scatter off circumstellar dust. Here the assumed density distribution consists of the TSC collapse model ("infall envelope"), a conical outflow cavity, and a geometrically thin but opaque disk. We find both objects, TMC-1A and TMC-1, can be explained in this framework with only modest changes in parameters. The data for TMC-1A also show evidence for spiral-like features. We discuss possible explanations for this effect.

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