Mathematics – Logic
Scientific paper
Sep 1966
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966rspsa.294..195b&link_type=abstract
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 294, Issue 1437, pp. 195-207
Mathematics
Logic
55
Scientific paper
The usual expression for the apparent luminosity of a distance source is valid only if most of the matter content of the universe is intergalactic. If not, two corrections are needed: one, which leads to a decrease in luminosity, is due to the missing matter on the light path; the second, which brightens the source, is due to the gravitational focusing by galaxies lying near the line of sight. A general formula which takes into account these corrections is derived and applied to the relations between observables (apparent magnitude, apparent diameter, red shift and number count) with a power expansion in terms of the red shift z. It turns out that the first term, linear in z, is not affected; but the second contains as a parameter the ratio f of the intergalactic matter density to the total density. Precise measurements of the first two coefficients would lead, in principle, independently of the particular cosmological model chosen, to an independent determination of f. The focusing effect due to local inhomogeneities is-on average-of third order in the red shift.
No associations
LandOfFree
The Luminosity of Distant Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Luminosity of Distant Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Luminosity of Distant Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1241431