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

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

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 t...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2008-04, Vol.385 (2), p.809-822
Hauptverfasser: Scaife, A. M. M., Hurley-Walker, N., Davies, M. L., Duffett-Smith, P. J., Feroz, F., Grainge, K. J. B., Green, D. A., Hobson, M. P., Kaneko, T., Lasenby, A. N., Pooley, G. G., Saunders, R. D. E., Scott, P. F., Titterington, D. J., Waldram, E. M., Zwart, J.
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Dust
Earth, ocean, space
Emissions
Exact sciences and technology
H ii regions
ISM: clouds
radiation mechanisms: thermal
radio continuum: ISM
Stars & galaxies
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Zusammenfassung: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.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2007.12743.x