Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 395, Issue 2, Pages 1055-1078Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2009.14599.x
Keywords
radiation mechanisms: non-thermal; dust, extinction; radio continuum: ISM
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Funding
- US Department of Energy [DE-FG03-92-ER40701]
- National Science Foundation [AST-0807337]
- NSF [AST-0607857]
- Alfred P. Sloan Foundation
- NASA Science Mission Directorate
- STFC [ST/F010885/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F010885/1] Funding Source: researchfish
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We present a comprehensive treatment of the spectrum of electric dipole emission from spinning dust grains, updating the commonly used model of Draine & Lazarian. Grain angular velocity distributions are computed using the Fokker-Planck equation; we revisit the drift and diffusion coefficients for the major torques on the grain, including collisions, grain-plasma interactions and infrared emission. We use updated grain optical properties and size distributions. The theoretical formalism is implemented in the companion code, SPDUST, which is publicly available. The effect of some environmental and grain parameters on the emissivity is shown and analysed.
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