SIMBAD references

2003ApJ...594..684M - Astrophys. J., 594, 684-694 (2003/September-2)

The redshift distribution of flat-spectrum radio sources.

MUNOZ J.A., FALCO E.E., KOCHANEK C.S., LEHAR J. and MEDIAVILLA E.

Abstract (from CDS):

The redshift distribution of flat-spectrum radio sources with 5 GHz flux densities S5≳5 mJy is a key component in using current radio lens surveys to probe the cosmological model. We have constructed the first flat-spectrum radio sample in the flux density range 3-20 mJy. Our new sample has 33 sources; we have determined the redshifts of 14 of these (42% complete). The low mean redshift, <z≥∼0.75, of our faintest sample needs to be confirmed by further observations to improve the sample completeness. We also increased the redshift completeness of several surveys of brighter flat-spectrum sources. While the mean redshift <z≥∼1.1 of flat-spectrum samples fainter than 1 Jy is nearly constant, the fraction of the sources identifiable as quasars steadily drops from ∼80% to ∼10% as the flux density of the sources decreases.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - Galaxies: Distances and Redshifts - Cosmology: Gravitational Lensing - Radio Continuum: Galaxies

Simbad objects: 316

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2023.03.20-17:04:49

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