The presence of internal dust in the nebulae M 20 and IC 5146

Details The presence of internal dust in the nebulae M 20 and IC 5146 The presence of internal dust in the nebulae M 20 and IC 5146

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989azh....66..641r&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 66, May-June 1989, p. 641-644. In Russian.

Astronomy and Astrophysics

Astronomy

1

Astronomical Spectroscopy, Cosmic Dust, H Ii Regions, Nebulae, Sagittarius Constellation, Albedo, Astronomical Photography, H Alpha Line, Light Scattering, Optical Thickness, Stellar Atmospheres

Scientific paper

Photographic observations of M 20 and IC 5146 were used to determine the radiation fluxes in the H-alpha spectral region and in two regions of the continuum. The observational data were introduced into a model of a nebula with internal dust which absorbs and scatters the radiation from the H II region and the central star. This made it possible to obtain probable estimates of the optical depth of the dust atmosphere of the nebula.

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