Question: When the mass of the star is 40x the sun, select all the stages that this star goes through.

(5 points)
Responses

red giant
red giant

neutron star
neutron star

blue giant
blue giant

main sequence
main sequence

white dwarf
white dwarf

black hole

1 answer

A star with a mass 40 times that of the Sun will undergo several stages in its life cycle. The following stages are applicable:

  1. Main Sequence: The star will spend a significant amount of time fusing hydrogen into helium in its core, just like other stars.

  2. Red Giant: As the star exhausts its hydrogen fuel, it will expand and cool to become a red giant.

  3. Blue Giant: Given its high mass, it may also transition to a blue supergiant stage as it continues to fuse heavier elements.

  4. Neutron Star: Following the supernova explosion, if the remnant core is between about 1.4 to 3 solar masses, it can become a neutron star.

  5. Black Hole: If the remnant core exceeds this mass limit, it will collapse into a black hole.

The relevant stages for a star with 40 times the mass of the Sun would be:

  • Main Sequence
  • Red Giant
  • Blue Giant
  • Neutron Star
  • Black Hole

White dwarf is not a stage expected for a star of this mass; it would not go through this stage.

In summary, the correct stages from the list provided are:

  • Main Sequence
  • Red Giant
  • Blue Giant
  • Neutron Star
  • Black Hole