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Issue A&A
Volume 420, Number 2, June III 2004
Page(s) 467 - 474
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20034126



A&A 420, 467-474 (2004)
DOI: 10.1051/0004-6361:20034126

Jet emission in NGC 1052 at radio, optical, and X-ray frequencies

M. Kadler1, J. Kerp2, E. Ros1, H. Falcke1, R. W. Pogge3 and J. A. Zensus1

1  Max-Planck-Institut für Radioastronomie Bonn, Auf dem Hügel 69, 53121 Bonn, Germany
2  Radioastronomisches Institut, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
3  Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210-1173, USA

(Received 28 July 2003 / Accepted 19 February 2004 )

Abstract
We present a combined radio, optical, and X-ray study of the nearby LINER galaxy NGC 1052. Data from a short (2.3 ks) CHANDRA observation of NGC 1052 reveal the presence of various jet-related X-ray emitting regions, a bright compact core and unresolved knots in the jet structure as well as an extended emitting region inside the galaxy well aligned with the radio synchrotron jet-emission. The spectrum of the extended X-ray emission can best be fitted with a thermal model with kT = (0.4-0.5) keV, while the compact core exhibits a very flat spectrum, best approximated by an absorbed power-law with $N_{\rm H} = (0.6{-}0.8) \times 10^{22}\,{\rm cm^{-2}}$. We compare the radio structure to an optical "structure map" from a Hubble Space Telescope (HST) observation and find a good positional correlation between the radio jet and the optical emission cone. Bright, compact knots in the jet structure are visible in all three frequency bands whose spectrum is inconsistent with synchrotron emission.


Key words: galaxies: individual: NGC 1052 -- galaxies: individual: B 0238-084 -- galaxies: active -- galaxies: jets



Offprint request: M. Kadler, mkadler@mpifr-bonn.mpg.de

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© ESO 2004


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