M87 in the near-infrared: the jet and the counterjet regions

Astronomy and Astrophysics – Astronomy

Scientific paper

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Radiation Mechanisms: Nonthermal, Galaxies: Individual: M87, Galaxies: Jets, Infrared: Galaxies.

Scientific paper

We have investigated the structure at near-infrared wavelengths (J and K bands) of the jet in M87, and of the expected counterjet region. We discuss the morphology of the IR emission not associated with optical sources and find that the near-IR structures of the jet and of the hotspot are morphologically intermediate between the radio and the optical, with both the hotspot and the jet more extended than in the optical. We attempt to measure the flux from the counterjet region and obtain an upper limit to its flux. Finally, we apply models of synchrotron emission to our data and discuss the implications of these fits.

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