Morphology of AGN in the central kiloparsec

Details Morphology of AGN in the central kiloparsec Morphology of AGN in the central kiloparsec

2001-07-10

arxiv.org/abs/astro-ph/0107179v2

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, uses newpasp.sty. To appear in "The Central kpc of Starbursts and AGN: the La Palma connection", Eds. J.H.

Scientific paper

Hubble Space Telescope observations of the central kiloparsec of AGN have revealed a wealth of structure, particularly nuclear bars and spirals, that are distinct from analogous features in the disks of spiral galaxies. WFPC2 and NICMOS images of a large sample of AGN observed at high spatial resolution make it possible to quantify the frequency and detailed properties of these structures. Nearly all AGN have nuclear spiral dust lanes in the central kiloparsec, while only a small minority contain nuclear bars. If these nuclear dust spirals trace shocks in the circumnuclear, gaseous disks, they may dissipate sufficient angular momentum to fuel the active nucleus.

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