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Characteristics of Nebulosity Associated with Parkes Quasars

Published online by Cambridge University Press:  14 August 2015

P. A. Wehinger ,
S. Wyckoff  and
T. Gehren
P. A. Wehinger
Affiliation:
Arizona State University and Northern Arizona University
S. Wyckoff
Affiliation:
Arizona State University
T. Gehren
Affiliation:
Max-Planck-Institut für Astronomie, Heidelberg

Extract

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A sample of 13 out of 15 low redshift (0.1 ≤ z ≤ 0.6) radio-loud quasars have been resolved on large-scale (19 arcsec mm−1), sky-limited (µR ∼ 26.5 mag sec−2) Kodak IIIa-F photographs obtained with the ESO 3.6-m telescope. The QSO images were analyzed by digitally subtracting the plate background and the point-spread function defined by images of nearby (≤ 1 arcmin) field stars having magnitudes comparable to the quasars (Δm ≲ 0.3 mag). The resolved nebulosities underlying the QSO images have isophotal diameters in the range θ ∼ 7 to 40 arcsec, with surface brightnesses µR ∼ 22–26 mag sec−2, and integrated apparent red magnitudes ∼ 16–21.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 375 - 376
Copyright
Copyright © Reidel 1982 

References

Wyckoff, S., Wehinger, P. A., and Gehren, T., 1981, Astrophys. J. , 247, 750.CrossRefGoogle Scholar