| Apresentação/Painel: | |
| Autor: | Rogemar A. Riffel1 | Thaisa Storchi Bergmann2 |
| Thaisa Storchi Bergmann | |
| Instituição: | 1UFSM - Santa Maria |
| Instituição: | 2UFRGS - Porto Alegre |
| Formato: | Painel |
| Título: | Gemini Near-IR Integral-Field Spectroscopy of the central region of Mrk1066 |
| Resumo: |
We
present a two-dimensional mapping of the near infrared emission-line
flux distributions and kinematics for the inner 350 pc of the
Seyfert 2 galaxy Mrk 1066 at a spatial resolution of ~ 35 pc
obtained using the Gemini Near-Infrared Integral-Field Spectrograph
(NIFS). The flux distributions for H2 2121.nm, [FeII] 1257 nm,
[PII] 1189 nm, Br gamma and Pabetaemission lines
are more extended along the position angle PA = 135/315o
showing a good correlation with 3.6
radio-continuum and [OIII] images and, except for the H lines, are
brighter to the north-west than to the south-east. This close
association with the radio hot spot implies that at least part of the
emitting gas is co-spatial with the radio outflow. The H emission is
stronger to the south-east, where we find a large region of
star-formation. The H2 flux is more uniformly distributed
and has an excitation temperature of ~ 2100 K. Its origin appears to
be circum-nuclear gas heated by X-rays from the central active
nucleus. The [FeII] emission also is consistent with X-ray heating,
but its spatial correlation with the radio jet and [OIII] emission
indicates additional emission due to shocks produced by the radio
jet.
Three components are observed on the gaseous kinematics: (i) an outflowing gas component, clearly observed for the ionized gas, and originated from the interaction of the radio jet with the emitting gas; (ii) streaming motions towards the center along the minor axis of the galaxy, which seems feed a (iii) compact rotating disc observed in the molecular hydrogen. A distinct kinematics of the molecular and ionized gas also is evidenced by the lower velocity dispersion values (sigma ~ 80 km s-1) observed for the former than the ones observed for the latter (sigma ~ 140 km s-1). |
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