AMI limits on 15-GHz excess emission in northern H ii regions

2007/11/20 by Anna M. M. Scaife, A. M. M. Scaife, N. Hurley-Walker +24 · 41 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Conjunction (astronomy) #Galaxies: Formation, Evolution, Phenomena #Physics #Radio Astronomy Observations and Technology #Spectral index #Spectral line #Spinning #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2007.12743.x

published in Monthly Notices of the Royal Astronomical Society 385(2), 809-822 (Oxford University Press) · accepted MNRAS

arxiv created 2007/11/20 · openalex publication_date 2008/02/29 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05

Abstract

We present observations between 14.2 and 17.9 GHz of 16 Galactic H ii regions made with the Arcminute Microkelvin Imager. 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 α= 0.15 ± 0.07 (where S∝ν−α) between 1.4 and 17.9 GHz for the sample.

Citations

• The NRAO VLA Sky Survey
• The Abundance of Interstellar Nitrogen
• CBI limits on 31 GHz excess emission in southern H II regions
• New signposts of massive star formation in the S235A-B region
• New light on the S235A-B star forming region
• Constraints on spinning dust towards Galactic targets with the Very Small Array: a tentative detection of excess microwave emission towards 3C396
• A determination of the spectra of Galactic components observed by the Wilkinson Microwave Anisotropy Probe