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index (1213 words) |
 | NGC 1097 is a very moderate example of an Active Galactic Nucleus (AGN), whose emission is thought to arise from matter (gas and stars) falling into oblivion in a central fl hole. |
| However, NGC 1097 possesses a comparatively faint nucleus only, and the fl hole in its centre must be on a very strict "diet": only a small amount of gas and stars is apparently being swallowed by the fl hole at any given moment. |
| Thus, astronomers [2] obtained images of NGC 1097 with the adaptive optics NACO instrument attached to Yepun, the fourth Unit Telescope of ESO's VLT. |
| NGC 1097 (952 words) |
| Traced backwards, all the jets intersected at the nucleus of NGC 1097. |
| From direct examination of the high resolution photographs, Arp was able to estimate a) the age of the jets, b) their ejection velocity, and c) frequency of ejection. |
| The assumed distance of NGC 1097 is 20 Mpc (based upon a Hubble Constant of 65 km/sec/Mpc). |
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