binary stars l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Binary Stars PowerPoint Presentation
Download Presentation
Binary Stars

Loading in 2 Seconds...

play fullscreen
1 / 20

Binary Stars - PowerPoint PPT Presentation


  • 289 Views
  • Uploaded on

Binary Stars. Double Stars/Binary Stars. Double Star. Earth. Binary Star. Earth. Visual Binary Stars. Center of Mass. Orbit of Star 1. Orbit of Star 2. Sirius A & B. Orbit of 12 Persei (Barlow, Scarfe, and Fekel. Visual Binaries.

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 'Binary Stars' - paul


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
double stars binary stars
Double Stars/Binary Stars

Double Star

Earth

Binary Star

Earth

visual binary stars
Visual Binary Stars

Center of Mass

Orbit of Star 1

Orbit of Star 2

visual binaries
Visual Binaries
  • Stars must be either close to us or far from each other.
    • Long orbital periods indicate they are far from each other. (years to decades)
  • About 10% of all stars are visual binaries
  • Possible planet detection
slide7

Spectroscopic Binaries

Spectrum of Hydrogen in Lab

Spectrum a Star…..Day 1

Spectrum a Star…..Day 2

Spectrum a Star…..Day 3

Spectrum a Star…..Day 4

What do these spectra tell us about the star?

spectroscopic binaries
Spectroscopic Binaries
  • Orbital Periods are several days
    • Stars are close together
  • Orbits inclined 90° to sky are discovered this way.
  • All of the extra-solar planets have been found in this way.
slide14

Classifications

Detached

65 RT And

Semi-detached

203 U Cep

Over-Contact

12 XY Leo

eclipsing binaries
Eclipsing Binaries
  • Chances of finding an eclipsing binary
    • Inclined  90° to sky
    • Stars close together
  • Same conditions as spectroscopic binary
    • Many are discovered in both ways
  • Eclipsing binaries also permit radius to be determined
relative radius

Second contact

separation = difference in radii

Eclipse begins

separation = sum of radii

Relative radius

Time difference between these events gives radii of stars