Dipolar radiation from spinning dust grains coupled to an electromagnetic wave

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Guerreiro, A. and Eloy, M. and Mendonça, J. T. and Bingham, R. (2007) Dipolar radiation from spinning dust grains coupled to an electromagnetic wave. Journal of Plasma Physics, 73 (4). pp. 555-563. ISSN 0022-3778 (https://doi.org/10.1017/S0022377806006076)

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Abstract

In this paper we investigate how the complex rotation and quivering motion of an elongated polarized dust grain in the presence of a monochromatic electromagnetic (EM) wave can produce dipolar emission with two distinct spectral components. We present a model for the emission of radiation by elongated polarized dust grains under the influence of both an external EM wave and a constant background magnetic field. The dust, exhibiting rotational motion at the external EM field frequency ω0 as well as quivering motion at a frequency Ω0, proportional to the EM field amplitude, will radiate with frequencies that will depend on the external field wavelength and amplitude. The radiated spectra exhibits a frequency around ω0, and sidebands at ω0 ± ω0 and ω0± 2Ω0. Since the amplitude and the frequency of the background EM field are independent parameters, this model establishes a correlation between different spectral components of galactic dipolar emission, which may help to explain the correlation between a component of the Galactic microwave emission and the 100 μ m thermal emission from interstellar dust that has been recently measured.

ORCID iDs

Guerreiro, A., Eloy, M., Mendonça, J. T. and Bingham, R. ORCID logoORCID: https://orcid.org/0000-0002-9843-7635;
  • Item type:Article
    ID code:51860
    Dates:
    Date
    Event
    August 2007
    Published
    6 December 2006
    Published Online
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:23 Feb 2015 13:07
    Last modified:11 Nov 2024 10:58
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/51860
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