Mustang 3.3 mm continuum observations of class 0 protostars

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

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

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 (Sv ∝ vα) 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 β between 0.862 mm, 1.25 mm, and 3.3 mm. βmm 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 βdisk 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.

Original languageEnglish (US)
JournalAstronomical Journal
Volume141
Issue number2
DOIs
StatePublished - Feb 1 2011

Keywords

  • Dust
  • Extinction-ISM
  • Image processing
  • Individual objects (B335,L1527,L483, L1448C,L1448N, L1448NW)-stars
  • Protostars-techniques

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Shirley, Y. L., Mason, B. S., Mangum, J. G., Bolin, D. E., Devlin, M. J., Dicker, S. R., & Korngut, P. M. (2011). Mustang 3.3 mm continuum observations of class 0 protostars. Astronomical Journal, 141(2). https://doi.org/10.1088/0004-6256/141/2/39