1 / 33

First results from CoRoT

First results from CoRoT. C. Karoff H. Kjeldsen , T. Arentoft, J. Christensen-Dalsgaard Danish AsteroSeismology Centre, University of Aarhus, Department of Physics and Astronomy, Denmark Instrument Center for Danish Astrophysic, Denmark. Convection, Rotation & planetary Transits.

calvin-snider
Télécharger la présentation

First results from CoRoT

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. First results from CoRoT C. Karoff H. Kjeldsen , T. Arentoft, J. Christensen-Dalsgaard Danish AsteroSeismology Centre, University of Aarhus, Department of Physics and Astronomy, Denmark Instrument Center for Danish Astrophysic, Denmark

  2. Convection, Rotation & planetary Transits CoRoT has two scientific objectives: • Stellar Seismology • Search for Exoplanets. Proteus platform • 27 cm afocal telescope • 4 2kx4k frame transfer CCDs • Colors provided by a prism in front of two of the CCDs

  3. 27th of December 2006 • CoRoT was launched with a Soyuz rocket from Baikonur on the 27th of December 2006. • Precision for Asteroseismology: 0.74 ppm in 5 days. • Precision for Planets: 0.075 % i one hour.

  4. Corot-Exo-1b Period: 1.5 d Mass: 1.3 MJ Radius: 1.78 RJ

  5. M(v): 3.39 • L/Lsun: 3.5 • Teff: 6457 K • Vsin(i): 10.9 km/s • R/Rsun: 1.5 • /Sun: 0.388 • Prot: 7.0 d

  6. HD49933

  7. Intensity and Sunspots Intensity from the GOLF instrument on the SOHO satellite (green channel). Intensitygram from the MDI instrument on SOHO.

  8. Sunspots and Rotation Period

  9. Sunspots and Rotation Period

  10. Sunspots and Rotation Period Solar rotation period at equator: 24 d

  11. Sunspots and Rotation Period Solar rotation period at equator: 24 d

  12. Sunspots and Rotation Period Solar rotation period at equator: 24 d

  13. Sunspots and Rotation Period Solar rotation period at equator: 24 d Typical spot size: 0.001 Large spots: 0.002

  14. Sunspots and Rotation Period Rotation period: 24 d Typical spot size: 0.001% (D ~ 44.000 km) Large spots: 0.002% (D ~ 76.000 km) Spot lifetime: 7-24 days (0.3-1.0 rot)

  15. HD49933

  16. HD49933Spots and Rotation Period Rotation period: 3.5 d

  17. HD49933Spots and Rotation Period Rotation period: 3.5 d

  18. HD49933Spots and Rotation Period Rotation period: 3.5 d Typical spot size: 0.0005 (D ~ 46.000 km) Large spots: 0.0015 (D ~ 80.000 km) Spot lifetime: 5-10 d (1.5-3 rot) Inclination: 30o

  19. Power Spectra of HD49933

  20. Stellar Oscillations

  21. Oscillations in The Sun

  22. Oscillations in The Sun

  23. Oscillations in The Sun ∆ν0 = 134.5 μHz

  24. HD49933The Large Separation l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 ∆ν0 = 85.6 μHz

  25. HD49933The Large Separation l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 ∆ν0 = 85.6 μHz

  26. The SunThe Small Separation ν02~ 10 μHz

  27. HD49933The Small Separation l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 ν02 = 6 μHz

  28. The SunThe Rotation Splitting Period ~ 24 d  ~ 0.5 μHz

  29. HD49933The Rotation Splitting l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 l=0 l=1 Periode ~ 3.5 d  ~ 3.3 μHz

  30. Getting the Physic out of HD49933

  31. Getting the Physic out of HD49933

  32. Future

More Related