The so-called Freeman law, based on the study of high surface brightness galaxies from 1970, states that all disk galaxies have almost the same central surface brightness, IB(0) = 21.7 mag arcsec (a) If the absolute magnitude of the Sun in V band is My,o its colour is B – V = 0.65, how many Lo does the central 1 pc of a disk galaxy radiate? Inn other words, what is the central surface brightness in units of ? = 4.83 and -
The so-called Freeman law, based on the study of high surface brightness galaxies from 1970, states that all disk galaxies have almost the same central surface brightness, IB(0) = 21.7 mag arcsec (a) If the absolute magnitude of the Sun in V band is My,o its colour is B – V = 0.65, how many Lo does the central 1 pc of a disk galaxy radiate? Inn other words, what is the central surface brightness in units of ? = 4.83 and -
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Transcribed Image Text:The so-called Freeman law, based on the study of high surface brightness galaxies from
1970, states that all disk galaxies have almost the same central surface brightness,
IB(0) = 21.7 mag arcsec-2.
(a) If the absolute magnitude of the Sun in V band is My,o
4.83 and
%3D
its colour is B – V
0.65, how many Lo does the central 1 pc of a disk galaxy
radiate? Inn other words, what is the central surface brightness in units of
b ?
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