AMI limits on 15 GHz excess emission in northern HII regions

Abstract

We present observations between 14.2 and 17.9 GHz of sixteen Galactic HII regions made with the Arcminute Microkelvin Imager (AMI). In conjunction with data from the literature at lower radio frequencies we investigate the possibility of a spinning dust component in the spectra of these objects. We conclude that there is no significant evidence for spinning dust towards these sources and measure an average spectral index of 0.15+/-0.07 between 1.4 and 17.9 GHz for the sample.

arXiv commentaccepted MNRAS

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• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission
• Planck early results. XXI. Properties of the interstellar medium in the Galactic plane
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• Anomalous Microwave Emission from the HII region RCW175
• Automated rapid follow-up of Swift GRBs with AMI-LA
• Probing the Bright Radio Flare and Afterglow of GRB 130427A with the Arcminute Microkelvin Imager
• The Yuan-Tseh Lee Array for Microwave Background Anisotropy
• AMI observations of Lynds Dark Nebulae: further evidence for anomalous cm-wave emission
• Identification of Spinning Dust in Halpha-Correlated Microwave Emission
• Low-metallicity Young Clusters in the Outer Galaxy. II. Sh 2-208
• IR-correlated 31 GHz radio emission from Orion East
• An excess of emission in the dark cloud LDN 1111 with the Arcminute Microkelvin Imager
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• AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region
• COMAP Early Science: VI. A First Look at the COMAP Galactic Plane Survey
• Radio continuum observations of Class I protostellar disks in Taurus: constraining the greybody tail at centimetre wavelengths
• Sunyaev-Zel'dovich observations of galaxy clusters out to the virial radius with the Arcminute Microkelvin Imager
• A 33 GHz VSA survey of the Galactic plane from 27 to 46 degrees
• Low-metallicity Young Clusters in the Outer Galaxy. III. Sh 2-127
• AMI Large Array radio continuum observations of Spitzer c2d small clouds and cores
• A blind detection of a large, complex, Sunyaev--Zel'dovich structure
• Anomalous Microwave Emission in HII regions: is it really anomalous? The case of RCW 49
• AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Serpens region
• The C-Band All-Sky Survey (C-BASS): New Constraints on the Integrated Radio Spectrum of M 31
• The long wavelength view of GG Tau A: Rocks in the Ring World
• Observations of Galactic star-forming regions with the Cosmic Background Imager at 31 GHz
• Observations of Anomalous Microwave Emission from HII regions
• Studies of Molecular Clouds associated with H II Regions: S175
• Investigating the source of Planck-detected AME: high resolution observations at 15 GHz