Physics and Chemistry of Purcell's Alignment

Details Physics and Chemistry of Purcell's Alignment Physics and Chemistry of Purcell's Alignment

1995-01-17

arxiv.org/abs/astro-ph/9501061v1

Astronomy and Astrophysics

Astrophysics

10 pages, uuencoded postscript file. Accepted to MNRAS

Scientific paper

Paramagnetic alignment of suprathermally rotating grains is discussed in view of recent progress in understanding subtle processes taking place over grain surface. It is shown that in typical ISM conditions, grains with surfaces of amorphous H$_{2}$O ice, defected silicate or polymeric carbonaceous material are likely to exhibit enhanced alignment, while those of aromatic carbonaceous material or graphite are not. The critical grain sizes and temperature for the Purcell's alignment are obtained and preferential alignment of large grains is established.

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