Ami observations of the anomalous microwave emission in the perseus molecular cloud

C T Tibbs, A. M M Scaife, Clive Dickinson, R. Paladini, Rodney Davies, R. J. Davis, Keith Grainge, Robert Watson

    Research output: Contribution to journalArticlepeer-review


    We present observations of the known anomalous microwave emission region, G159.6-18.5, in the Perseus molecular cloud at 16 GHz performed with the Arcminute Microkelvin Imager Small Array. These are the highest angular resolution observations of G159.6-18.5 at microwave wavelengths. By combining these microwave data with infrared observations between 5.8 and 160 μm from the Spitzer Space Telescope, we investigate the existence of a microwave-infrared correlation on angular scales of 2′. We find that the overall correlation appears to increase toward shorter infrared wavelengths, which is consistent with the microwave emission being produced by electric dipole radiation from small, spinning dust grains. We also find that the microwave-infrared correlation peaks at 24 μm (6.7σ), suggesting that the microwave emission is originating from a population of stochastically heated small interstellar dust grains rather than polycyclic aromatic hydrocarbons. © 2013. The American Astronomical Society. All rights reserved.
    Original languageEnglish
    Pages (from-to)98
    JournalAstrophysical Journal
    Issue number2
    Early online date18 Apr 2013
    Publication statusPublished - 10 May 2013


    • dust, extinction
    • infrared: ISM
    • ISM: clouds
    • ISM: general
    • ISM: individual objects (G159.6?18.5)
    • radio continuum: ISM


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