http://arxiv.org/abs/1709.03561
This paper presents Very Long Baseline Array (VLBA) observations of 13 double-peaked [O III] emission line Type 2 Active Galactic Nuclei (AGNs) at redshifts 0.06 < z < 0.41 (with a median redshift of z~0.15) identified in the Sloan Digital Sky Survey. Such double-peaked emission line objects may result from jets or outflows from the central engine or from a dual AGN. The VLBA provides an angular resolution of <~10 pc at the distance of many of these galaxies, sufficient to resolve the radio emission from extremely close dual AGNs and to contribute to understanding the origin of double-peaked [O III] emission lines. Of the 13 galaxies observed at 3.6 cm (8.4 GHz), we detect six at a 1-\sigma\ sensitivity level of ~0.15 mJy/beam, of which two show clear jet structures on scales ranging from a few milliarcseconds to tens of milliarcseconds (corresponding to a few pc to tens of pc at a median redshift of 0.15). We suggest that radio-loud double-peaked emission line Type 2 AGNs may be indicative of jet produced structures, but a larger sample of double-peaked [O III] AGNs with high angular resolution radio observations will be required to confirm this suggestion.
X. Liu, T. Lazio, Y. Shen, et. al.
Wed, 13 Sep 17
26/72
Comments: 15 pages, 7 figures; ApJ submitted