SIMBAD references

2005ApJ...624..254S - Astrophys. J., 624, 254-266 (2005/May-1)

Density and temperature structure of TMC-1C from 450 and 850 micron maps.


Abstract (from CDS):

We have mapped the central 10'x10' of the dense core TMC-1C at 450 and 850 µm using SCUBA on the James Clerk Maxwell Telescope. The unusually high quality of the 450 µm map allows us to make a detailed analysis of the temperature and column density profiles of the core. We find that the dust temperature at the center of TMC-1C is ∼7 K, rising to ∼11 K at the edges. We discuss the possibility and effects of a variable emissivity spectral index on the derived mass profile. The low dust temperature of TMC-1C results in a high derived mass for the core, significantly larger than the virial mass estimated from the line width of the N2H+ (1-0) transition. This result is valid within a wide range of dust properties and ellipticities of the core. The N2H+ (1-0) spectra, taken with the IRAM 30 m telescope, show signs of self-absorption, which provide evidence of subsonic infall motions. The derived density profile and infall velocity are compared to the predictions of several popular star formation models, and the Bonnor-Ebert model is the best-fit analytic model.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - Stars: Formation - Submillimeter

CDS comments: Parag. 5.1 : L1698B is a misprint for L1689B (= LDN 1689B)

Simbad objects: 15

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