Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194..485m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 194, Feb. 1981, p. 485-502.
Astronomy and Astrophysics
Astronomy
22
Cosmic Dust, Interstellar Extinction, Interstellar Matter, Orion Nebula, Polarization (Waves), Abundance, Coalescing, Deposition, Distribution Functions, Evaporation, H Ii Regions, Particle Size Distribution, Polarimetry, Radiation Pressure, Spectrophotometry
Scientific paper
Reddened stars located within the bounds of the Great Nebula in Orion (M42), M43, and the nearby H II region NGC 1973, 1975, 1977 are found to have wavelengths of peak polarization larger than those of surrounding stars. Because the polarization can be attributed primarily to intracluster dust, it is concluded that grains located inside the nebulae are larger than grains outside. Surrounding grains appear to be similar in size to those in the general interstellar medium. Constraints on the origin of the large grains in the H II regions are provided by recent optical and radio observations of M42, which show that the gas-phase metal abundances are depleted everywhere relative to the sun and that a strong radial gradient in these abundances is not present. Five processes which could lead to large mean grain sizes are discussed. The most likely explanation is preferential evaporation of the small grains of an interstellar grain size distribution after turn-on of the central stars.
No associations
LandOfFree
Big grains in the Orion nebula does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Big grains in the Orion nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Big grains in the Orion nebula will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1408328