A Possible Tilted Orbit of the Super-Neptune HAT-P-11b
| Autor: | Norio Narita, Avi Shporer, Bun'ei Sato, Motohide Tamura, Wako Aoki, Teruyuki Hirano |
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| Rok vydání: | 2011 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Physics Scattering FOS: Physical sciences Astronomy Astronomy and Astrophysics Exoplanet law.invention Radial velocity Telescope Photometry (astronomy) Space and Planetary Science Neptune law Orbit (dynamics) Astrophysics::Earth and Planetary Astrophysics Transit (astronomy) Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Publications of the Astronomical Society of Japan. 63:S531-S536 |
| ISSN: | 2053-051X 0004-6264 |
| Popis: | We report the detection of the Rossiter-McLaughlin effect for the eccentric, super-Neptune exoplanet HAT-P-11b, based on radial velocity measurements taken with HDS mounted on the Subaru 8.2m telescope, and simultaneous photometry with the FTN 2.0m telescope, both located in Hawai'i. The observed radial velocities during a planetary transit of HAT-P-11b show a persistent blue-shift, suggesting a spin-orbit misalignment in the system. The best-fit value for the projected spin-orbit misalignment angle is $\lambda= 103_{-19}^{+23}$ deg. Our result supports the notion that eccentric exoplanetary systems are likely to have significant spin-orbit misalignment (e.g., HD 80606, WASP-8, WASP-14, WASP-17, and XO-3). This fact suggests that not only hot-Jupiters but also super-Neptunes like HAT-P-11b had once experienced dynamical processes such as planet-planet scattering or the Kozai migration. Comment: 6 pages, 2 figures, submitted to PASJ |
| Databáze: | OpenAIRE |
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