MUSTANG 3.3 Millimeter Continuum Observations of Class 0 Protostars - Astrophysics > Astrophysics of GalaxiesReport as inadecuate




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Abstract: We present observations of six Class 0 protostars at 3.3 mm 90 GHz usingthe 64-pixel MUSTANG bolometer camera on the 100-m Green Bank Telescope. The3.3 mm photometry is analyzed along with shorter wavelength observations toderive spectral indices S nu ~ nu^alpha of the measured emission. We utilizepreviously published dust continuum radiative transfer models to estimate thecharacteristic dust temperature within the central beam of our observations. Wepresent constraints on the millimeter dust opacity index, beta, between 0.862mm, 1.25 mm, and 3.3 mm. Beta mm typically ranges from 1.0 to 2.4 for Class 0sources. The relative contributions from disk emission and envelope emissionare estimated at 3.3 mm. L483 is found to have negligible disk emission at 3.3mm while L1527 is dominated by disk emission within the central beam. Thebeta mm^disk <= 0.8 - 1.4 for L1527 indicates that grain growth is likelyoccurring in the disk. The photometry presented in this paper may be combinedwith future interferometric observations of Class 0 envelopes and disks.



Author: Yancy L. Shirley, Brian S. Mason, Jeffrey G. Mangum, David E. Bolin, Mark J. Devlin, Simon R. Dicker, Phillip M. Korngut

Source: https://arxiv.org/







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