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Companions to High Redshift Quasars

Published online by Cambridge University Press:  30 March 2016

Esther M. Hu
Esther M. Hu*
Affiliation:
Institute for Astronomy University of Hawaii2680 Woodlawn Drive Honolulu, HI 96822USA

Abstract

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Lyman a companions to high-redshift quasars appear associated with radio activity in the quasar. Of the five known companion systems seen at typical Lα fluxes of a few x 10-16 ergs cm-2 sec-1, all are associated with quasars which are radio sources, and lie within a few arcseconds of the quasar. We summarize results of searches for the companions, and report on subsequent investigations into the spectral energy distribution and radio studies of these objects. Multi-color imaging from 3400 Å to 2.2/μ shows the companion to PKS 1614+051 possesses a blue SED similar to an irregular at that redshift. VLA observations show double-lobed structure around Q1033+137 with depolarization of the counterjet lobe.

Type
Joint Commission Meetings
Information
Highlights of Astronomy , Volume 9: Highlights of Astronomy. As presented at the XXIst General Assembly of the IAU, 1991 , 1992 , pp. 693 - 694
Copyright
Copyright © Kluwer 1992

References

Chambers, K.C., and Chariot, , 1990, S. Ap. J. (Letters), 348, L1.Google Scholar
Djorgovski, S. 1988, in Towards Understanding Galaxies at Large Redshifts, ed. Kron, R. G. and Renzini, A., (Dordrecht: Kluwer), 259.Google Scholar
Djorgovski, S., Spinrad, H., McCarthy, P., and Strauss, M. A. 1985, Ap. J. (Letters), 299, L1.Google Scholar
Djorgovski, S., Strauss, M. A., Perley, R. A., Spinrad, H., and McCarthy, P. 1987, A. J., 93, 1318.Google Scholar
Hu, E. M., and Cowie, L. L. 1987, Ap. J. (Letters), 317, L7.Google Scholar
Hu, E. M., Songaila, A., Cowie, L. L., and Stockton, A. 1991, Ap. J., 368, 28.Google Scholar
Kjaergaard, P., Moller, P., Jensen, P., and Jorgensen, I. 1989, in IAU Symposium No. 134, ed. Osterbrock, D. E. and Miller, J. S., (Dordrecht: Kluwer), 53.Google Scholar
Windhorst, R. A. 1989, in The Evolution of the Universe of Galaxies, ed. Kron, R. G., Astr. Soc. Pac. Conf. Ser., 10, 389.Google Scholar