Документ взят из кэша поисковой машины. Адрес оригинального документа : http://zebu.uoregon.edu/messier/m2.txt Дата изменения: Thu Oct 20 21:18:45 1994 Дата индексирования: Mon Oct 1 21:19:24 2012 Кодировка:

This is an infrared (K-band) image of M2. The effective band wavelength
is about 2 microns which is near the peak of the spectral energy distribution
for old, cool stars in a globular cluster. The light from the cluster at
2 Microns is dominated by Red Giant Stars. Since the typical ratio of
main sequence to giants stars in a globular cluster is 1 to a few hundred,
we are seeing, in this photograph, this minority population of very bright
stars. Hence the core of the cluster is not burned out in this image.