1 / 10

Variable Star Observing Lets You Make Valuable Scientific Contributions

Variable Star Observing Lets You Make Valuable Scientific Contributions. Plus You Can Do Some Fun Things With The Data & Images, A Few E xamples: Light Curves Super Nova Compute Temperature Compute Spin Periods. Light Curve: Mira Class Star A Pulsating Variable: RR Boo.

arva
Download Presentation

Variable Star Observing Lets You Make Valuable Scientific Contributions

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. Variable Star Observing Lets You Make Valuable Scientific Contributions Plus You Can Do Some Fun Things With The Data & Images, A Few Examples: Light Curves Super Nova Compute Temperature Compute Spin Periods

  2. Light Curve: Mira Class StarA Pulsating Variable: RR Boo Light Curves Are Made From Multiple Individual Observations! Approximately 300 Days Shown

  3. Light Curve:Eclipsing Dwarf Nova - Single Observer ~ 4 Hours Data Two Complete Eclipses Shown

  4. Light Curve: Dwarf Nova Outbursts - Multiple Observers Approximately 200 Days Shown SS CYG Most Observed Star In The AAVSO Data Base ~ 500,000 Observations over 100 Years

  5. Supernova Are A Blast Many Supernova Occur Within Galaxies Therefore, Good “Photo OP”

  6. Compute Temperature Example Black Dots: = V Filter Blue Dots = B Filter Red Dots = R Filter Purple Dots = I Filter Average B-V (Filters) Difference = .616 TuCas: Cepheid Variable (Yellow Giant Star) V Filter B Filter

  7. With a “B-V” of .616 Star is Most Likely a G1 or G2 Spectral Type & is Actually Classified As a “Yellow Giant” Temperature Range: 5700-6000 K

  8. 3.6 Hour Light Curve Of DW Cnc DW Cnc Is An Intermediate Polar CV Consisting Of A White Dwarf & A Cool Companion & We Can Analyze The Data Below For Additional Information Tim Crawford 1/29/07 Peranso Software

  9. Example Of Computing The Spin PeriodOf The White Dwarf Portion Of The DW Cnc System Using The Previous Slides Light Curve Data & Software That Can Analyze That Data Using What is Called the CLEANest Method P = .0268 Day = 38.6 Minutes Peranso Software

  10. Oregon Arch Cape Observatory Presentation Tim R Crawford - CTX tcarchcape@yahoo.com

More Related