Accurate Redshifts and Classifications for 110 Radio-Loud AGNs
Abstract
We report accurate redshifts of 110 active galaxies (mostly radio-loud objects at z<0.4) observed in the course of a survey to find broad, double-peaked emission lines. These redshifts are measured from the narrow emission lines of these objects and are accurate to at least one part in 10^4 . For each object we determine a redshift from high- and low-ionization lines separately, as well as an average redshift from all the available lines. We find that in about 15% of cases, the low-ionization lines yield a slightly higher redshift than the high-ionization lines; the average redshift difference amounts to a velocity difference of approximately 80 km/s. In addition to the redshift measurements we also report revised redshifts for two objects as well as new classifications for three narrow-line objects.
Cite
@article{arxiv.astro-ph/0309498,
title = {Accurate Redshifts and Classifications for 110 Radio-Loud AGNs},
author = {Michael Eracleous and Jules P. Halpern},
journal= {arXiv preprint arXiv:astro-ph/0309498},
year = {2009}
}
Comments
To appear in the Astrophysical Journal Supplements