Freeman law
id:
freeman-law-257-4310172
title:
Freeman law
text:
The Freeman law is a statement in astronomy which says that disk galaxies have the same surface brightness, Σ at the center. It was described in 1970 by Ken Freeman. More recently it has been argued that the Freeman law is an effect of selection bias. However, after accounting for selection effects, the Freeman law was confirmed in the year 2010 for a sample of 30000 Sloan Digital Sky Survey galaxy images. It can be used with the Tully–Fisher relation to determine the luminosity and therefore di
brand slug:
wiki
category slug:
encyclopedia
description:
Astronomical statement
original url:
https://en.wikipedia.org/wiki/Freeman_law
date created:
date modified:
2023-08-15T06:11:03Z
main entity:
{"identifier":"Q5501020","url":"https://www.wikidata.org/entity/Q5501020"}
image:
fields total:
13
integrity:
14