Feeding the active nucleus of NGC 1097

Details Feeding the active nucleus of NGC 1097 Feeding the active nucleus of NGC 1097

2002-11-21

arxiv.org/abs/astro-ph/0211477v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in the proceedings of the conference Star Formation through Time, Granada, Sep. 2002, ASP Eds. Pe

Scientific paper

We discuss the signatures of an evolving accretion disk around the nucleus of NGC 1097, based on observations of its double-peaked H-alpha emission-line profile which cover a time span of 10 yrs. The monitoring of the profile has allowed us to better constrain the inner radius of the accretion disk, and to propose a scenario in which the ionizing source is getting dimmer and making the peak of the disk emissivity to drift inwards.

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