The Prograde Orbit of Exoplanet TrES‐2b
| Autor: | John Asher Johnson, Debra A. Fischer, R. Paul Butler, Norio Narita, Joshua N. Winn, Edwin L. Turner, Yasushi Suto, B. Scott Gaudi, Steven S. Vogt, Francis T. O'Donovan |
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| Rok vydání: | 2008 |
| Předmět: |
010504 meteorology & atmospheric sciences
Equator FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences symbols.namesake Planet 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Transit (astronomy) 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Stellar rotation Astrophysics (astro-ph) Giant planet Astronomy and Astrophysics Exoplanet Orbit Space and Planetary Science symbols Astrophysics::Earth and Planetary Astrophysics Doppler effect |
| Zdroj: | The Astrophysical Journal. 682:1283-1288 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | We monitored the Doppler shift of the G0V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9 +/- 12 degrees relative to the projected stellar equator. With 98% confidence, the orbit is prograde. Comment: ApJ, in press [15 pages] |
| Databáze: | OpenAIRE |
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