Core Mass Function of Molecular Clouds and its Dependence on Temperature

Details Core Mass Function of Molecular Clouds and its Dependence on Temperature Core Mass Function of Molecular Clouds and its Dependence on Temperature

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26..162m&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

Scientific paper

We report observations of dust continuum emission towards the star forming regions NGC 6334 and NGC 6357 made with the SIMBA bolometer array at the SEST (La Silla). The observations cover an area ˜ 1°×3° with approximately uniform noise. On a preliminary analysis of the map using the clumpfind algorithm (clfind2d, Williams, de Geus, & Blitz, 1994) we find 347 clumps spanning almost three orders of magnitude in mass. Masses were estimated as being proportional to optically thin dust emission at 250 GHz. We derive an overall clump mass function of the form dN/d logM ∝ M^{-0.6}. In this poster we concentrate on the mass spectrum of NGC 6334 and on the possible effects of having a distribution of clump temperatures in this mass spectrum. MSX three color images were used to correlate dust clumps with infrared sources searching for embedded protostars. Also, the clumps considered to have embedded sources correlated well with ATCA free-free emission maps, verifying their higher temperatures. We find that having up to 10 endtex2html[d]eferred% of the clumps with hotter temperatures does not affect significantly the mass spectrum even though it tends to decrease significantly the higher clump masses.

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