The dust distribution in some small H II regions

Details The dust distribution in some small H II regions The dust distribution in some small H II regions

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..89..407n&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 89, no. 2, Jan. 1983, p. 407-419.

Astronomy and Astrophysics

Astrophysics

5

Cosmic Dust, H Ii Regions, Interstellar Matter, Mass Distribution, Astronomical Photometry, Astronomical Spectroscopy, Chronology, Hydrogen Ions, Interstellar Extinction, Interstellar Gas

Scientific paper

Based on the calibrated maps in the Hα and V bands, simple shell models for the distributions of ionized gas and dust are calculated for the small H II regions S237 and S254-S257. In deriving the dust distribution from the V-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 observed H II regions. The formation of this dust depletion zone and the evolutionary state of these H II regions are briefly discussed.

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