Users' questions

How do you plot a star on an H-R diagram?

How do you plot a star on an H-R diagram?

Plot the luminosity on the y-axis with brighter stars going toward the top. Since brighter stars have lower magnitudes, if you choose to plot magnitude on the y-axis, the values will decrease as you go up! That’s OK – just remember that the luminosity of the star is increasing. Plot temperature on the x-axis.

Where does your star fit on the H-R diagram?

Hot stars inhabit the left hand side of the diagram, cool stars the right hand side. Bright stars at the top, faint stars at the bottom. Our Sun is a fairly average star and sits near the middle.

What types of stars are on the H-R diagram?

The four main groups of stars are clearly identified:

  • Main Sequence: most stars, like our Sun; this is the area on the H-R diagram where most stars will spend their stellar lives.
  • Supergiants: cool stars which are very large and very bright.
  • Giants: cool stars which are a little smaller and dimmer than the Supergiants.

What two characteristics of stars are shown in an H-R diagram?

Temperature. The two primary characteristics of the HR diagram are temperature and luminosity. Luminosity is defined as the brightness / absolute magnitude or output of energy; whereas, temperature is defined as the average speed of moving particles.

Where is Sirius on the H-R diagram?

At the lower left corner of the H-R diagram are the smallest stars. Stars like Sirius B and Procyon B are just the opposite of the supergiants. They are extremely hot, dense, and dim. These are white dwarf stars that are about the size of the earth, and about as massive as the sun.

Where on this diagram do we find stars that are cool and luminous?

Stars that are cool and dim are located in the lower right of the plot. Cool and luminous stars are in the upper right, hot and dim stars are in the lower left, and hot and luminous stars are in the upper left.

What are the 4 main groups of stars?

The Different Types of Stars

  • Protostar. A protostar is what comes before a star has formed – a collection of gas that collapsed from a huge molecular cloud.
  • T Tauri Stars.
  • Main Sequence Stars.
  • Red Giant Stars.
  • White Dwarf Stars.
  • Red Dwarf Stars.
  • Neutron Stars.
  • Supergiant Stars.

What are the 4 categories of the H-R diagram?

There are four main types of stars found in the Hertzsprung Russell diagram – main sequence, white dwarfs, giants and supergiants – which fall into seven of the spectral classes. The sun falls in spectral class G.