Infrared spectropolarimetric observations of BNKL - The grain alignment mechanism

Details Infrared spectropolarimetric observations of BNKL - The grain alignment mechanism Infrared spectropolarimetric observations of BNKL - The grain alignment mechanism

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.215..815a&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 215, Aug. 15, 1985, p. 815-831. SERC-supported research

Astronomy and Astrophysics

Astronomy

31

Infrared Astronomy, Interstellar Matter, Nebulae, Orion Constellation, Polarimetry, Angular Momentum, Hydrogen Clouds, Rotation

Scientific paper

Spectropolarimetric observations between 8 - 13 μm of BN, IRc 2, 3, 4 and a further region in the Orion infrared complex BNKL are presented. Apart from IRc 2, all show evidence for absorption by aligned grains and have polarization position angles directed at a region close to IRc 2, a property also shared by the self-luminous source IRc 9 at short wavelengths. The evidence strongly suggests that grains are aligned by the intrinsic angular momentum of photons from IRc 2 and it is shown that this is a quantitatively plausible mechanism for the physical conditions in this part of Orion.

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