Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0807.3985)
· References in the article
· Citations to the Article (7) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (5)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Anomalous Microwave Emission from the H II Region RCW175
Authors:
Dickinson, C.; Davies, R. D.; Allison, J. R.; Bond, J. R.; Casassus, S.; Cleary, K.; Davis, R. J.; Jones, M. E.; Mason, B. S.; Myers, S. T.; Pearson, T. J.; Readhead, A. C. S.; Sievers, J. L.; Taylor, A. C.; Todorović, M.; White, G. J.; Wilkinson, P. N.
Affiliation:
AA(Infrared Processing and Analysis Center, California Institute of Technology, M/S 220-6, 1200 E. California Blvd., Pasadena, CA 91125, USA ), AB(Jodrell Bank Observatory, University of Manchester, Lower Withington, Macclesfield, Cheshire, SK11 9DL, UK ), AC(Oxford Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK ), AD(Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Canada ), AE(Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile ), AF(Chajnantor Observatory, California Institute of Technology, M/S 105-24, Pasadena, CA 91125, USA ), AG(Jodrell Bank Observatory, University of Manchester, Lower Withington, Macclesfield, Cheshire, SK11 9DL, UK ), AH(Oxford Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK ), AI(National Radio Astronomy Observatory, Green Bank, WV, USA ), AJ(National Radio Astronomy Observatory, Socorro, NM, USA ), AK(Chajnantor Observatory, California Institute of Technology, M/S 105-24, Pasadena, CA 91125, USA ), AL(Chajnantor Observatory, California Institute of Technology, M/S 105-24, Pasadena, CA 91125, USA ), AM(Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Canada ), AN(Oxford Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK ), AO(Jodrell Bank Observatory, University of Manchester, Lower Withington, Macclesfield, Cheshire, SK11 9DL, UK ), AP(Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK), AQ(Jodrell Bank Observatory, University of Manchester, Lower Withington, Macclesfield, Cheshire, SK11 9DL, UK )
Publication:
The Astrophysical Journal, Volume 690, Issue 2, pp. 1585-1589 (2009). (ApJ Homepage)
Publication Date:
01/2009
Origin:
IOP
ApJ Keywords:
ISM: individual: RCW175, radiation mechanisms: general, radio continuum: ISM
DOI:
10.1088/0004-637X/690/2/1585
Bibliographic Code:
2009ApJ...690.1585D

Abstract

We present evidence for anomalous microwave emission in the RCW175 H II region. Motivated by 33 GHz 13' resolution data from the Very Small Array (VSA), we observed RCW175 at 31 GHz with the Cosmic Background Imager (CBI) at a resolution of 4'. The region consists of two distinct components, G29.0-0.6 and G29.1-0.7, which are detected at high signal-to-noise ratio. The integrated flux density is 5.97 ± 0.30 Jy at 31 GHz, in good agreement with the VSA. The 31 GHz flux density is 3.28 ± 0.38 Jy (8.6σ) above the expected value from optically thin free-free emission based on lower frequency radio data and thermal dust constrained by IRAS and WMAP data. Conventional emission mechanisms such as optically thick emission from ultracompact H II regions cannot easily account for this excess. We interpret the excess as evidence for electric dipole emission from small spinning dust grains, which does provide an adequate fit to the data.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints