Computer Science
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..476..283d&link_type=abstract
Conference on 3K cosmology. AIP Conference Proceedings, Volume 476, pp. 283-292 (1999).
Computer Science
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Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus
Scientific paper
Experiments to measure anistropies in the cosmic background radiation have discovered a new ``anomalous'' component of galactic emission in the 15-90 GHz region. This component is correlated with interstellar dust, but has an intensity and spectrum very different from what interstellar dust had been expected to emit at these frequencies. The ``anomalous emission'' has been interpreted by the some as free-free emission, but free-free emission from interstellar plasma cannot possibly be this strong. The ``anomalous emission'' can be quite naturally explained as the ``rotational'' emission from the population of ultrasmall dust grains which is independently required by observations of 3-60 μm diffuse infrared emission. Alternatively, some of the observed 15-90 GHz emission could be due to magnetic dipole emission from magnetic materials in interstellar grains. Experiments to distinguish between these two emission processes are discussed.
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