Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21531904a&link_type=abstract
American Astronomical Society, AAS Meeting #215, #319.04; Bulletin of the American Astronomical Society, Vol. 42, p.320
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained optical multi-band polarimetry towards sightlines through the Chamaeleon I cloud, particularly in the vicinity of the young B9/A0 star HD 97300. We show that the radiation field impinging on the cloud in the projected vicinity of the star, is dominated by the flux from the star, as evidenced both by a local enhancement in the grain heating and through a systematic disturbance of the polarization topology. By comparing the differential grain heating with the differential change in the location of the peak of the polarization curve, we show that the grain alignment is enhanced by the increase in the radiation field, providing direct support for radiatively driven grain alignment. (Based on paper submitted to ApJ)
Andersson Bengt-Goran
Potter Stephen B.
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