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Department of Physics Colloquium - Gold Lecture

Monday, April 22, 2019 at 4:00pm to 5:00pm

Rockefeller Hall, Schwartz Auditorium
Central Campus

General Physics Colloquium and Gold Lecture,  Professor Bruce Draine, Princeton University.

Refreshments from 3:30-3:50 pm

Title:  Anomalous Microwave Emission from the Interstellar Medium

Host:  Dong Lai

Abstract:  The "Anomalous Microwave Emission" (AME) is emission in the 20-60 GHz
range that is spatially correlated with interstellar dust. Discovered
in 1996 by the COBE DMR experiment, the AME is a "foreground" that
needs to be removed to study the CMB. The AME is also an
astrophysical puzzle: the emission process responsible for the AME
remains uncertain.

One hypothesis is that the AME is electric dipole radiation from
nanoparticles spinning at 20-60 GHz, although other hypotheses have
also been proposed, including thermal fluctuations in the
magnetization of ferromagnetic grain materials. The
existing evidence favors the "spinning dust" hypothesis.

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Astronomy, Physics


physics, astronomy, cascal, "


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Sue Sullivan

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Professor Bruce Draine

Speaker Affiliation

Princeton University

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