Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139...30g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 1, Oct. 1984, p. 30-36.
Astronomy and Astrophysics
Astronomy
7
H Ii Regions, Herbig-Haro Objects, Interstellar Extinction, Interstellar Matter, Light Scattering, Orion Nebula, Radio Sources (Astronomy), Abundance, Balmer Series, Cosmic Dust, Emission Spectra, Radiative Transfer, Ultraviolet Astronomy
Scientific paper
The effect of scattering by dust internal to H II regions on their spectral characteristics has been studied on the basis of simple analytical models, for assumed universal optical parameters of the dust. A procedure to determine the external interstellar extinction and the internal gas to dust abundance ratio of H II regions has been developed and applied as a test to the Orion Nebula. Newly acquired observations of the H II region NGC 896 have been analyzed to identify the effects of internal dust on its spectrum and to establish its relationship to the background radio source W3 (cont.). Finally, the effects that the probable existence of scattering dust internal to HH-objects might have on the color of their spectrum has been included.
Gomez Garrido P.
Muench Gus
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