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Near IR - Observations of the Jet in M87

Published online by Cambridge University Press:  19 July 2016

M. Neumann ,
K. Meisenheimer ,
H.-J. Röser  and
M. Stickel
M. Neumann
Affiliation:
Max Planck - Institut für Astronomie, Königstuhl 17, D - 69117 Heidelberg
K. Meisenheimer
Affiliation:
Max Planck - Institut für Astronomie, Königstuhl 17, D - 69117 Heidelberg
H.-J. Röser
Affiliation:
Max Planck - Institut für Astronomie, Königstuhl 17, D - 69117 Heidelberg
M. Stickel
Affiliation:
Max Planck - Institut für Astronomie, Königstuhl 17, D - 69117 Heidelberg

Extract

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The central region of M87 in the K′ (2.1 μm) - band was imaged using the 2.2m telescope on Calar Alto, Spain. In addition to the jet our K′ exposure (Fig. 1) shows an arclike structure ∼ 24 arcsec southeast of the nucleus. This is the IR counterpart to the feature detected by Stiavelli et al. (1992) in the optical and to the brightness maximum of the southeastern radiolobe designated as “theta” (Hines et al. 1989). Its radio to IR spectral index is α = −0.88 ±0.01 (Sv ∞ v α), consistent with the radio spectral index of α = −0.84 ± 0.07 (Salter et al. 1989) of the whole radio lobe measured between 5 GHz and 230 GHz.

Type
Poster Contributions: Continuum studies
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 329
Copyright
Copyright © Kluwer 1994 

References

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Stiavelli, M., Biretta, J., Møller, P., Zeilinger, W.W., 1992, Nature 355, 802 CrossRefGoogle Scholar