Hr Diagram Line. In this graphic construction each star is a point marked on the ordinate by its brightness luminosity or absolute magnitude and on the abscissa by its spectral type or surface temperature. Because stars emit light via black body radiation the power per.
The hr diagram is a very useful tool for helping understand the differences between the different types of stars and how a star changes throughout its life. The site has accompanying explanations and background information. Sizes in an hr diagram.
Developed independently in the early 1900s by ejnar hertzsprung and henry norris russell it plots the temperature of stars against their luminosity the theoretical hr diagram or the colour of stars or spectral type against their absolute magnitude the.
So the h r diagram can tell us something about the size radius of the stars. Devised around one hundred years ago by scientists ejnar hertzsprung and henry norris russell it plots the spectral class of numbers of stars along the x axis and their absolute magnitude along the y axis. The hertzsprung russell diagram hr diagram is one of the most important tools in the study of stellar evolution. Hr organizational reporting structure for large companies.