Chapters 14 and 15 stellar evolution and stellar remnants
Download
1 / 21

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


  • 169 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Chapters 14 and 15 Stellar Evolution and Stellar Remnants' - nitara


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
Chapters 14 and 15 Stellar Evolution and Stellar Remnants




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
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





Elderly, core:

White Dwarf

The core of the

white dwarf star is

now all carbon and

oxygen


Elderly, envelope:

Planetary nebula

Ring Nebula

Eskimo Nebula




Figure 13.19

Elderly, dying star:Supernova



Our Sun will never explode.

Only massive stars explode

as supernova!


Elderly, core:

Neutron Star

Core

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




ad