Chapters 14 and 15 stellar evolution and stellar remnants
Sponsored Links
This presentation is the property of its rightful owner.
1 / 21

Chapters 14 and 15 Stellar Evolution and Stellar Remnants PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Chapters 14 and 15 Stellar Evolution and Stellar Remnants. Star Birth: Nebula. Young star: Protostar. Adult: Main Sequence .

Download Presentation

Chapters 14 and 15 Stellar Evolution and Stellar Remnants

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Chapters 14 and 15 Stellar Evolution and Stellar Remnants

Star Birth: Nebula

Young star: Protostar

Adult: Main Sequence

  • As the temperature in the interior rises, nuclear reactions produce outward force and balances the inward force of gravity  hydrostatic equilibrium = star becomes stable and contraction stopsmain-sequence star

Energy Sources in Stars

  • 4 hydrogen nuclei fuse to become 1 helium nucleus

  • Since the mass of 4 hydrogen nuclei is greater than the mass of 1 helium nucleus, the leftover mass (0.7%) is converted to energy by Einstein’s equation: E=mc2

The end states of stars depends upon its mass!

The more massive a star, the faster it consumes its fuel, the shorter its lifetime


Evolution of Low Mass Stars including our Sun M < 10 Solar Masses

Old Age: Red Giant

Elderly, core:

White Dwarf

The core of the

white dwarf star is

now all carbon and


Elderly, envelope:

Planetary nebula

Ring Nebula

Eskimo Nebula

Yeah, but what about the really Massive stars?

Old Age: Red Supergiant

Figure 13.19

Elderly, dying star:Supernova

Super Nova Remnants

Our Sun will never explode.

Only massive stars explode

as supernova!

Elderly, core:

Neutron Star


High mass stars becomes so dense that protons and electrons combine to become neutrons and star becomes neutron star

Life Cycle of a Low Mass Star

Life Cycle of a High Mass Star

  • Login