Why does a star's luminosity drop so much during the Hayashi ...

[amal]

Why does a star's luminosity drop so much during the Hayashi track?
 
  What will be an ideal response?

Question 2

What are the main constituents of the solar wind?
 
  What will be an ideal response?

[adammoses97]

Answer to Question 1

The surface of the star maintains a fairly constant temperature but the size continues to shrink significantly. Since the luminosity depends on the square of the radius, as the radius decreases by a factor of 100, the luminosity drops by a factor of 10,000. The slight increase in surface temperature changes the luminosity only a little.

Answer to Question 2

Protons and electrons are the main constituents of the solar wind.

[amal]

Excellent

[nothere]

Thanks for the timely response, appreciate it