Statistics – Computation
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152....1c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. 1-5.
Statistics
Computation
5
Cosmic Dust, Interstellar Magnetic Fields, Interstellar Matter, Alignment, Computational Astrophysics, Monte Carlo Method, Spheroids
Scientific paper
The conditions under which interstellar paramagnetic dust grains can acquire enhanced thermal spinning alignment (ETSA) after passing through a phase of suprathermal spin alignment (SSA) are discussed analytically. The dust grains, prolate spheroids, are assumed experience collisions with other molecules, resulting in the formation of 'sites' from which ejecta are emitted. If the locations of the sites are randomly distributed, then the momentum transfer from the collisions will result in a particular long-term orientation of the grains. The process will be augmented by thermal rotational excitation, i.e., SSA. If the thermal effects become dominant, then ETSA will occur. However, ETSA will become dominant only if the grains experience sufficiently rapid resurfacing to offset collisional damping forces.
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