2010MNRAS.406L..45S

Query : 2010MNRAS.406L..45S

2010MNRAS.406L..45S - Mon. Not. R. Astron. Soc., 406, L45-L49 (2010/July-3)

Microwave observations of spinning dust emission in NGC6946: AMI consortium.

SCAIFE A.M.M., NIKOLIC B., GREEN D.A., BECK R., DAVIES M.L., FRANZEN T.M.O., GRAINGE K.J.B., HOBSON M.P., HURLEY-WALKER N., LASENBY A.N., OLAMAIE M., POOLEY G.G., RODRIGUEZ-GONZALVEZ C., SAUNDERS R.D.E., SCOTT P.F., SHIMWELL T.W., TITTERINGTON D.J., WALDRAM E.M. and ZWART J.T.L.

Abstract (from CDS):

We report new cm-wave measurements at five frequencies between 15 and 18GHz of the continuum emission from the reportedly anomalous `region 4' of the nearby galaxy NGC6946. We find that the emission in this frequency range is significantly in excess of that measured at 8.5GHz, but has a spectrum from 15 to 18GHz consistent with optically thin free-free emission from an ultracompact HII region. In combination with previously published data, we fit four emission models containing different continuum components using the Bayesian spectrum analysis package radiospec. These fits show that, in combination with data at other frequencies, a model with a spinning dust component is slightly preferred to those that possess better-established emission mechanisms.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): radiation mechanisms: general - galaxies: individual: NGC6946

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
3 4C 54.42 QSO 20 31 47.9586852408 +54 55 03.138662316   18.7       ~ 48 1
4 [MHC2010] Enuc 4 Rad 20 34 19.17 +60 10 08.7           ~ 3 0
5 [MHC2010] Enuc 8 Rad 20 34 32.52 +60 10 22.0           ~ 3 0
6 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2

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