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:astro-ph/0608274)
· References in the article
· Citations to the Article (12) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Radio Sources toward Galaxy Clusters at 30 GHz
Authors:
Coble, K.; Bonamente, M.; Carlstrom, J. E.; Dawson, K.; Hasler, N.; Holzapfel, W.; Joy, M.; La Roque, S.; Marrone, D. P.; Reese, E. D.
Affiliation:
AA(Department of Chemistry and Physics, Chicago State University, 9501 South King Drive, Chicago, IL 60628, USA ; NSF Astronomy and Astrophysics Postdoctoral Fellow, Adler Planetarium and Astronomy Museum, Chicago, IL 60605, USA ; Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ), AB(Department of Space Science/NSSTC, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA ; Department of Physics, University of Alabama, Huntsville, AL 35805, USA ), AC(Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ; Department of Physics, Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ), AD(Department of Physics, University of California, Berkeley, CA 94720, USA ; Now at Lawrence Berkeley National Laboratory ), AE(Department of Physics, University of Alabama, Huntsville, AL 35805, USA ), AF(Department of Physics, University of California, Berkeley, CA 94720, USA ), AG(Department of Space Science/NSSTC, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA ), AH(Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ), AI(Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ; Jansky Fellow, National Radio Astronomy Observatory ), AJ(Physics Department, University of California, Davis, CA 95616, USA)
Publication:
The Astronomical Journal, Volume 134, Issue 3, pp. 897 (2007). (AJ Homepage)
Publication Date:
09/2007
Origin:
IOP
DOI:
10.1086/519973
Bibliographic Code:
2007AJ....134..897C

Abstract

Extragalactic radio sources are a significant contaminant in cosmic microwave background and Sunyaev-Zel'dovich effect experiments. Deep interferometric observations with the BIMA and OVRO arrays are used to characterize the spatial, spectral, and flux distributions of radio sources toward massive galaxy clusters at 28.5 GHz. We compute counts of millijansky source fluxes from 89 fields centered on known massive galaxy clusters and 8 noncluster fields. We find that source counts in the inner regions of the cluster fields (within 0.5′ of the cluster center) are a factor of 8.9 times higher than counts in the outer regions of the cluster fields (radius greater than 0.5′). Counts in the outer regions of the cluster fields are, in turn, a factor of 3.3 greater than those in the noncluster fields. Counts in the noncluster fields are consistent with extrapolations from the results of other surveys. We compute the spectral indices of millijansky sources in the cluster fields between 1.4 and 28.5 GHz and find a mean spectral index of α = 0.66 with an rms dispersion of 0.36, where flux S ~ ν. The distribution is skewed, with a median spectral index of 0.72 and 25th and 75th percentiles of 0.51 and 0.92, respectively. This is steeper than the spectral indices of stronger field sources measured by other surveys.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints
    



SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ