MUSTANG 3.3 mm CONTINUUM OBSERVATIONS OF CLASS 0 PROTOSTARS

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/141/2/39· OSTI ID:21583256

Shirley, Yancy L; Bolin, David E ^[1]; Mason, Brian S; Mangum, Jeffrey G ^[2]; Devlin, Mark J; Dicker, Simon R; Korngut, Phillip M ^[3]

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1. Steward Observatory, University of Arizona, 933 Cherry Avenue, Tucson, AZ 85721 (United States)
2. NRAO, 520 Edgemont Road, Charlottesville, VA 22903-2475 (United States)
3. University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104-6396 (United States)

We present observations of six Class 0 protostars at 3.3 mm (90 GHz) using the 64 pixel MUSTANG bolometer camera on the 100 m Green Bank Telescope. The 3.3 mm photometry is analyzed along with shorter wavelength observations to derive spectral indices (S{sub {nu}} {proportional_to} {nu}{sup {alpha}}) of the measured emission. We utilize previously published dust continuum radiative transfer models to estimate the characteristic dust temperature within the central beam of our observations. We present constraints on the millimeter dust opacity index {beta} between 0.862 mm, 1.25 mm, and 3.3 mm. {beta}{sub mm} typically ranges from 1.0 to 2.4 for Class 0 sources. The relative contributions from disk emission and envelope emission are estimated at 3.3 mm. L483 is found to have negligible disk emission at 3.3 mm, while L1527 is dominated by disk emission within the central beam. The {beta}{sup disk}{sub mm} {<=} 0.8-1.4 for L1527 indicates that grain growth is likely occurring in the disk. The photometry presented in this paper may be combined with future interferometric observations of Class 0 envelopes and disks.

• OSTI ID: 21583256
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 2 Vol. 141; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BOLOMETERS
CAMERAS
DUSTS
GRAIN GROWTH
IMAGE PROCESSING
MEASURING INSTRUMENTS
PHOTOMETRY
PROCESSING
PROTOSTARS
STARS
TELESCOPES