Thermal Flipping of Interstellar Grains

Details Thermal Flipping of Interstellar Grains Thermal Flipping of Interstellar Grains

2008-08-27

arxiv.org/abs/0808.3727v1

Astrophys.J.690:875-878,2009

Astronomy and Astrophysics

Astrophysics

5 pages, accepted by ApJ

Scientific paper

10.1088/0004-637X/690/1/875

In interstellar dust grains, internal processes dissipate rotational kinetic energy. The dissipation is accompanied by thermal fluctuations, which transfer energy from the vibrational modes to rotation. Together, these processes are known as internal relaxation. For the past several years, internal relaxation has been thought to give rise to thermal flipping, with profound consequences for grain alignment theory. I show that thermal flipping is not possible in the limit that the inertia tensor does not vary with time.

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