1 / 20

Binary Stars

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.

amish
Download Presentation

Binary Stars

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Binary Stars

  2. Double Stars/Binary Stars Double Star Earth Binary Star Earth

  3. Visual Binary Stars Center of Mass Orbit of Star 1 Orbit of Star 2

  4. Sirius A & B

  5. Orbit of 12 Persei(Barlow, Scarfe, and Fekel

  6. 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

  7. 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?

  8. Spectroscopic Binary Stars

  9. Radial Velocity Curve HDE 226868

  10. 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.

  11. Eclipsing Binary Stars

  12. Roche Lobes

  13. Classifications Detached 65 RT And Semi-detached 203 U Cep Over-Contact 12 XY Leo

  14. Star Light Pro

  15. 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

  16. Second contact separation = difference in radii Eclipse begins separation = sum of radii Relative radius Time difference between these events gives radii of stars

  17. Mass-Luminosity Relationship

More Related