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: http://www.sao.ru/fetch/HL/leda/param/ring.html
Дата изменения: Mon Dec 23 18:23:59 2013 Дата индексирования: Fri Feb 28 17:12:06 2014 Кодировка: Поисковые слова: optical telescope |
Note, that as well as for bars, the detection of a ring is subject to
strong observational effects (bandpass, spatial resolution, ...).
Only a small fracteion of the largest galaxies in the database have been
searched for a ring and the parameter ring is strongly biased.
There are 3168 galaxies with ring=R (in the May 2003 version).
The parameter bar reports another
morphological particularity of the galaxies: The presence of a bar.