Parsec scale properties of nearby BL Lacs

Details Parsec scale properties of nearby BL Lacs Parsec scale properties of nearby BL Lacs

2004-08-11

arxiv.org/abs/astro-ph/0408213v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the VI Italian Conference on Active Galactic Nuclei. 8 pages, includes 9 .eps files and agn6.cls

Scientific paper

We present new radio data completing the imaging for a sample of 30 nearby (z < 0.2) BL Lac objects on parsec and kiloparsec scale. The sample is composed of both high and low luminosity sources and it is therefore an ideal test bed for unified schemes in the low power regime. VLBI and VLA data are used, thus providing information on both extended and inner, beamed components. We find morphologies and jet parameters consistent with a parent population composed of FR I radio galaxies, i.e. in agreement with the unified scheme. We also present a comparison to high quality HST data; we find a correlation between the radio and optical core luminosities, and speculate about the accretion rates for the central black holes.

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