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Anomalous microwave emission from spinning nanodiamonds around stars

Frayer, D. T.; Smith, A. M. S.; Greaves, J. S. +3 more

Several interstellar environments produce anomalous microwave emission (AME), with brightness peaks at tens-of-gigahertz frequencies¹. The emission's origins are uncertain; rapidly spinning nanoparticles could emit electric-dipole radiation², but the polycyclic aromatic hydrocarbons that have been proposed as the carrier are …