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: http://www.sao.ru/fetch/HL/leda/param/bri25.html
Дата изменения: Mon Dec 23 18:23:59 2013
Дата индексирования: Fri Feb 28 17:30:04 2014
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Поисковые слова: arp220
Mean surface brigthness within 25 mag isophot (B-band): bri25
bri25 (or amp25) is the apparent brightness : B + 5logD +3.63 + as
where B is the apparent magnitude in the B-band,
logD is the logd25 diameter and as is the inclination correction in magnitude per squared arcsec and is
calculated as given below:
k is the bulge to disk ratio and depends on morphological type as follows: k=0.754*10(-0.2*t),
if k >1 then k=1 (Simien and de Vaucouleurs) K is the coefficient dlogD/db (where D is the isophotal diameter at surface brightness b).
It depends on the morphological type t as:
K = 0.12-0.007*t if t < 0. K = 0.094 if t >= 0.
