Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-12-11
Astronomy and Astrophysics
Astrophysics
3 pages, 2 figures, to be published the in ASP conference proceedings of "Gas and Galaxy Evolution", eds. J.E. Hibbard, M.P. R
Scientific paper
The VLA has been used to image HI in a heterogeneous sample of nine Seyferts as part of a continuing investigation of the role of galactic host gas in the triggering and fuelling of nuclear activity. Where previous single-dish observations indicated complex, poorly understood kinematics, improved angular resolution and sensitivity reveal tidal tails and intragroup gas, distinguish dwarfs from main disks and resolve non-linear gas dynamical features such as shocks in bars. Seyferts may be abnormally gas-rich, but a larger, statistically significant comparison of HI properties of normal and active galaxies is now required.
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