Giant grains in Orion

Details Giant grains in Orion Giant grains in Orion

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.172..109r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 172, July 1975, p. 109-116.

Astronomy and Astrophysics

Astronomy

20

Astronomical Models, Cosmic Dust, Infrared Astronomy, Interstellar Matter, Nebulae, Particle Size Distribution, Optical Thickness, Silicates, Submillimeter Waves

Scientific paper

A model of a spherically symmetric, optically thick dust cloud is proposed in order to account for the infrared and submillimeter spectrum of the Orion nebula. Flux and temperature distribution calculations show some modifications of Larson's (1969) model. An expression for the absorption efficiency of the grains is given which assumes silicate grains. A bimodal distribution of grain sizes, peaking at about 0.2 micron and 10-100 microns accounts best for the observed spectrum.

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