Spectral Indices of the Radio Sources.

Details Spectral Indices of the Radio Sources. Spectral Indices of the Radio Sources.

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pnaoc...4...11y&link_type=abstract

Astronomical Research and Technology. Publications of National Astronomical Observatories of China (ISSN 1672-7673), Vol. 4, No.

Astronomy and Astrophysics

Astronomy

Active Galactive Nuclei, Radio Sources, Flat Spectral Radio Quasars, Bl Lacertae Objects

Scientific paper

In this paper 162 radio sources, including 47 BL Lacs, 21 galaxies and 94 flat spectral radio quasars (FSRQs) are studied. All sources were extracted from the University of Michigan Radio Astronomy Observatory database observed by the 26-meter Michigan Radio Telescope. Most of the sources were observed at three bands: 4.8GHz, 8GHz and 14.5GHz. The average flux densities of the three subclasses are calculated and the weighted average spectral index (αwei), αBL=0.08±0.28, αGAL=-0.91±0.32, αFSRQ=-0.14±0.4 are obtained. Some radio properties are discussed in this paper, including the spectral index, the relation between the flux and the redshift, the relation between the flux and the spectral index.

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