Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jphcs.131a2035r&link_type=abstract
"Journal of Physics: Conference Series, Volume 131, Proceedings of "The Universe Under the Microscope - Astrophysics at High Ang
Astronomy and Astrophysics
Astrophysics
Scientific paper
We observed the central regions of the well-known LIRG / Seyfert 1.2 galaxy NGC 7469 with adaptive optics, performing K band long-slit spectroscopic observations with NaCo at VLT. We concentrate here on the inner 100 pc, focusing on the structure of the NLR. The study of the continuum as well as of the molecular and ionized hydrogen emission lines shows some unexpected properties that raise several questions that we consider as different pieces of a unique puzzle. The most striking result of our study is the detection of broad ionized hydrogen emission over a 45pc radius around the central source with a symmetric behaviour with respect to the central core. We also detect molecular hydrogen in the innermost part of this Seyfert nuclei. The continuum emission corresponds to a very hot black body. We interpret all those facts as due to some Thomson scattering by electrons of the NLR. The temperature evolution is in good agreement with this interpretation and the electron density we derive is compatible with densities found in NLRs of typical AGNs.
Gratadour Damien
Rouan Daniel
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