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The dust distribution in some smallHII regions |
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| Authors: | M Nakano T Kogure S Mizuno K Sakka T Sasaki S D Wiramihardja |
| Institution: | 1. Department of Astronomy, University of Kyoto, Sakyo-ku, Kyoto, Japan 2. Kanazawa Institute of Technology, Kanazawa, Japan 3. Kyoto School of Computer Science, Shimogamo-Honmachi, Kyoto, Japan 4. Department of Astronomy, University of Kyoto, Sakyo-ku, Kyoto, Japan |
| Abstract: | Based on the calibrated maps in the Hα andV bands, simple shell models for the distributions of ionized gas and dust are calculated for the smallHii regions S237 and S254–S257. In deriving the dust distribution from theV-band maps, it is assumed that scattering particles are made of dirty ice. The results of calculation show that a dust depletion zone should be placed in the central region of each of the observedHii regions. The formation of this dust depletion zone and the evolutionary state of theseHii regions are briefly discussed. |
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