Table of Contents
- 1 What information does the Hertzsprung-Russell diagram tell us about stars?
- 2 Which 4 properties does the H-R diagram used to classify stars?
- 3 What does an HR diagram relate a star’s temperature to quizlet?
- 4 What do astronomers use the HR diagram for?
- 5 What did Ejnar Hertzsprung and Henry Norris Russell discover?
What information does the Hertzsprung-Russell diagram tell us about stars?
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 observational HR diagram, also known as a colour-magnitude …
What is the Hertzsprung-Russell diagram used for?
The Hertzsprung–Russell diagram, abbreviated as H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars’ absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
Which 4 properties does the H-R diagram used to classify stars?
The characteristics that are used in order to classify the stars on the Hertzsprung-Russell diagram are size, density, temperature, and absolute brightness. They do not use the composition as they use the spectrographs for that purpose.
What does the Hertzsprung Russell diagram compare quizlet?
WHAT IS A HERTZSPRUNG-RUSSELL DIAGRAM? A diagram that shows the relationship or differences between SURFACE TEMPERATURE and LUMINOSITY of STARS.
What does an HR diagram relate a star’s temperature to quizlet?
A graph that shows the relationship between stars temperature and absolute magnitude. The location of the hottest stars on the HR diagram.
Is the Hertzsprung-Russell diagram useful in astronomy?
So far we have discussed the luminosity and colour or effective temperature of stars. These can be plotted to form what is one of the most useful plots for stellar astronomy, the Hertzsprung-Russell (or H-R) diagram.
What do astronomers use the HR diagram for?
Astronomers generally use the HR diagram to either summarise the evolution of stars, or to investigate the properties of a collection of stars.
Where are white dwarf stars found on the HR diagram?
white dwarf stars (luminosity class D) are the final evolutionary stage of low to intermediate mass stars, and are found in the bottom left of the HR diagram. These stars are very hot but have low luminosities due to their small size. The Sun is found on the main sequence with a luminosity of 1 and a temperature of around 5,400 Kelvin.
What did Ejnar Hertzsprung and Henry Norris Russell discover?
Danish astronomer Ejnar Hertzsprung and American astronomer Henry Norris Russell discovered that when they compared the luminosity with the type of light that was observed from stars, there were many patterns that emerged.