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Emission mechanisms in composite galaxies

Published online by Cambridge University Press:  24 November 2004

M. E. Filho ,
F. Fraternali ,
S. Markoff ,
N. M. Nagar ,
P. D. Barthel ,
L. C. Ho  and
F. Yuan
M. E. Filho
Affiliation:
Kapteyn Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands IRA, CNR, Via P. Gobetti, 101, 40129 Bologna, Italy CAUP, Rua das Estrelas, 4150 – 762 Porto, Portugal
F. Fraternali
Affiliation:
Kapteyn Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands ASTRON, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands
S. Markoff
Affiliation:
MIT, Center for Space Research, 77 Massachusetts Av., R. NE80 – 6035, Cambridge, Massachusetts 02139, USA
N. M. Nagar
Affiliation:
Kapteyn Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands
P. D. Barthel
Affiliation:
Kapteyn Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands
L. C. Ho
Affiliation:
OCIW, 813 Santa Barbara Street, Pasadena, California 91101, USA
F. Yuan
Affiliation:
Purdue University, Department of Physics, 525 Northwestern Av., West Lafayette, Indiana, 47907 – 2036, USA
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Abstract

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High resolution radio and X-ray observations of a subsample of composite LINER/H II galaxies with arcsec-scale radio cores were obtained. These observations yield a 12% detection rate of low luminosity AGN among the entire composite sample in the Palomar survey. Four of these low luminosity AGN also possess sub-parsec jet-like radio extensions. While canonical advection-dominated accretion flows may be responsible for the radio and X-ray emission in submillijansky cores like NGC 7331, they do not appear consistent with the radio emission in these milliarcsecond-scale radio cores; the latter sources are more likely to have an energetically important contribution from a radio-emitting jet.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 91 - 92
Copyright
© 2004 International Astronomical Union