Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998baas...30..769k&link_type=abstract
American Astronomical Society Meeting, 191, #130.10
Astronomy and Astrophysics
Astronomy
Scientific paper
We present high-resolution near-infrared images of the Seyfert 2 galaxy IC 5063 obtained using NICMOS in broad-band filters at 1.1, 1.6, and 2.2 mu m. The images show a very red unresolved point source at the center of the galaxy confirming the existence of the obscured active nucleus inferred from previous ground-based studies. The 2.2 mu m flux, supplemented with ground-based L'-band observations, suggests thermal emission from hot dust in the inner part of the molecular torus surrounding the nucleus. We also present lower resolution images of IC 5063 obtained with NICMOS in the emission lines of [Fe II] lambda 1.644 mu m, Paalpha lambda 1.8756 mu m, and H2 lambda 2.1218 mu m. These images show a linear emission morphology, consisting of two bright knots on either side of a central knot that is at the location of the continuum nucleus. A comparison with high-resolution radio continuum maps shows a one-to-one spatial correspondence between the radio lobes and the emission-line knots, implying that the [Fe II] and H2 emission is created by fast shocks produced by the advancing radio jets.
Axon Dave
Bergeron Louis
Calzetti Daniela
Colina Luis
Daou Doris
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