Dust emission spectra from star-forming regions

Computer Science – Numerical Analysis

Scientific paper

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Cosmic Dust, Interstellar Matter, Luminosity, Spectral Energy Distribution, Star Formation, Stellar Envelopes, Astronomical Models, H Ii Regions, Infrared Sources (Astronomy), Interstellar Extinction, Numerical Analysis, Radiative Transfer

Scientific paper

Observations at 350 and 1300 microns, performed with the 3 and 2.2 m University of Hawaii telescopes on Mauna Kea, were obtained of the dust emission spectra of 12 heavily obscured star-forming regions, and a radiative transfer model is used to try to fit observations from about 1 to 1300 microns. Results indicate that the hot dust close to the star, responsible for the emission below 20 microns, has low density and produces little extinction, while the region of cold dust far away from the star has high density and gives large extinction. It is also found that the emission above 100 microns contains on the average 18 + or - 6 percent of the total luminosity, and that some of the compact H II regions are heavily dust depleted.

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