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Investigating the source of planck-detected AME: High-resolution observations at 15 GHz


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Authors

Perrott, YC 
Scaife, AMM 
Hurley-Walker, N 
Grainge, KJB 

Abstract

The Planck 28.5 GHz maps were searched for potential Anomalous Microwave Emission (AME) regions on the scale of ∼3 or smaller, and several new regions of interest were selected. Ancillary data at both lower and higher frequencies were used to construct spectral energy distributions (SEDs), which seem to confirm an excess consistent with spinning dust models. Here we present higher resolution observations of two of these new regions with the Arcminute Microkelvin Imager Small Array (AMI SA) between 14 and 18 GHz to test for the presence of a compact ($\sim$10 arcmin or smaller) component. For AME-G107.1+5.2, dominated by the {\sc Hii} region S140, we find evidence for the characteristic rising spectrum associated with the either the spinning dust mechanism for AME or an ultra/hyper-compact \textsc{Hii} region across the AMI frequency band, however for AME-G173.6+2.8 we find no evidence for AME on scales of ∼2−10 arcmin.

Description

Keywords

astro-ph.GA, astro-ph.GA

Journal Title

Advances in Astronomy

Conference Name

Journal ISSN

1687-7969
1687-7977

Volume Title

Publisher

Hindawi Limited