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


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