VLA and VLBA observations of compact radio cores in LINER galaxies
VLA and VLBA observations of compact radio cores in LINER galaxies
H. Falcke1,
L.C. Ho2,
J.S. Ulvestad3,
A.S. Wilson4,
N.M. Nagar4
1Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
(hfalcke@mpifr-bonn.mpg.de)
2Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101,
USA (lho@ociw.edu)
3NRAO, P.O. Box O, 1003 Lopezville Road, Socorro, NM 87801 (julvesta@aoc.nrao.edu)
4Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA (wilson,neil@astro.umd.edu)
to appear in: Proceedings of the International Symposium on
Astrophysics Research And Science Education at The Vatican
Observatory, June 14-21 1998, Castel Gandolfo, Italy, Ed. C. Impey
Abstract:
A VLA survey of nearby LINER
galaxies at 15 GHz has revealed the presence of a compact radio core
in many sources. The cores seem to be correlated with the optical
activity. Follow-up VLBA observations of the ten brightest sources
confirm that these cores have brightness temperatures >10^8 Kelvin,
thus confirming their AGN nature. The two
brightest radio sources show extended jet-like structures and the
flat spectral indices of all cores also suggest a jet nature
rather than emission from an ADAF.
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Questions: Heino Falcke, hfalcke@mpifr-bonn.mpg.de