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Photometric Study of Radio Galaxies in the RATAN-600 “Cold” Survey

Published online by Cambridge University Press:  12 April 2016

O. V. Verkhodanov ,
Yu. N. Parijskij ,
N. S. Soboleva ,
A. I. Kopylov ,
A. V. Temirova ,
O. P. Zhelenkova  and
W. M. Goss
O. V. Verkhodanov
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
Yu. N. Parijskij
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
N. S. Soboleva
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
A. I. Kopylov
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
A. V. Temirova
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
O. P. Zhelenkova
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Russia
W. M. Goss
Affiliation:
National Radio Astronomy Observatory, Socorro, NM, USA

Abstract

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About 100 steep-spectrum radio sources from the RATAN-600 RC catalog were mapped by the VLA and identified with optical objects down to 24m–25m in the R band using the 6-m telescope. An updated list of calibrators with known redshifts of the same class of RGs was compiled to evaluate the accuracy of photometric redshift estimates. BVRI photometry for 60 RC objects was performed with the 6-m telescope, and by standard model fitting we have estimated color redshifts and ages of the stellar populations of the host gE galaxies. The mean redshift of FR II RGs from the RC list turned out to be ≈1. Several objects were found in which active star formation began in the first billion years after the Big Bang.

Type
Part 4. Radio Surveys for AGN
Information
International Astronomical Union Colloquium , Volume 184: AGN Surveys , 2002 , pp. 310 - 311
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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