Journal
ASTROPHYSICAL JOURNAL
Volume 768, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/768/2/98
Keywords
dust, extinction; infrared: ISM; ISM: clouds; ISM: general; ISM: individual objects (G159.6-18.5); radio continuum: ISM
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Funding
- NASA/ADP ROSES [09-ADP09-0059]
- STFC
- EU Marie-Curie IRG grant under the FP7
- Cambridge University
- STFC [ST/J001562/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001562/1] Funding Source: researchfish
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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 mu m from the Spitzer Space Telescope, we investigate the existence of a microwave-infrared correlation on angular scales of similar to 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 mu m (6.7 sigma), suggesting that the microwave emission is originating from a population of stochastically heated small interstellar dust grains rather than polycyclic aromatic hydrocarbons.
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