2016ApJ...831...59D

Query : 2016ApJ...831...59D

2016ApJ...831...59D - Astrophys. J., 831, 59-59 (2016/November-1)

Quantum suppression of alignment in ultrasmall grains: microwave emission from spinning dust will be negligibly polarized.

DRAINE B.T. and HENSLEY B.S.

Abstract (from CDS):

The quantization of energy levels in small, cold, free-flying nanoparticles suppresses dissipative processes that convert grain rotational kinetic energy into heat. For interstellar grains small enough to have ∼GHz rotation rates, the suppression of dissipation can be extreme. As a result, alignment of such grains is suppressed. This applies both to alignment of the grain body with its angular momentum \boldsymbolJ, and to alignment of \boldsymbolJ with the local magnetic field \boldsymbolB0. If the anomalous microwave emission is rotational emission from spinning grains, then it will be negligibly polarized at GHz frequencies, with P <= 10–6 at ν > 10 GHz.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmic background radiation - dust, extinction - ISM: magnetic fields - molecular processes - polarization - solid state: refractory - solid state: refractory

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
2 GAL 159.6-18.5 Rad 03 39 55.7 +31 55 33           ~ 35 1
3 LDN 1622 DNe 05 54 28 +01 48.2           ~ 110 0
4 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
5 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
6 RCW 175 HII 18 46.8 -03 45           ~ 27 0

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