Hr Diagram With Color. Spectral classes in hr diagrams are described in table 1. In a true hr diagram you would plot the effective temperature of a star on the x axis and the luminosity of a star on the y axis.
The hr diagram a stars luminosity or absolute magnitude and temperature or spectral type or b v color index determine its position of the hr diagram. The table developed in 1901. Fall along a narrow strip in the diagram.
Our cmd of m67 was able to reveal some very useful information.
We are able to determine that this cluster is metal rich contains mostly high mass stars is around 15 x 106 years old and has a distance of about 3900 parsecs. The hertzsprung russell diagram a graph of the temperature and luminosity of stars is called the hertzsprung russell diagram h r diagram which is named after two famous astronomers. The hr diagram a stars luminosity or absolute magnitude and temperature or spectral type or b v color index determine its position of the hr diagram. Blue stars are more luminous than red stars.