The Dust Emissivity Spectral Index in the Starless Core TMC-1C

Details The Dust Emissivity Spectral Index in the Starless Core TMC-1C The Dust Emissivity Spectral Index in the Starless Core TMC-1C

2009-11-04

arxiv.org/abs/0911.0892v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

11 pages, including 5 pages of figures. Accepted to ApJ

Scientific paper

In this paper we present a dust emission map of the starless core TMC-1C taken at 2100 microns. Along with maps at 160, 450, 850 and 1200 microns, we study the dust emissivity spectral index from the (sub)millimeter spectral energy distribution, and find that it is close to the typically assumed value of beta = 2. We also map the dust temperature and column density in TMC-1C, and find that at the position of the dust peak (A_V ~ 50), the line-of-sight-averaged temperature is ~7 K. Employing simple Monte Carlo modeling, we show that the data are consistent with a constant value for the emissivity spectral index over the whole map of TMC-1C.

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