A Possible Tilted Orbit of the Super-Neptune HAT-P-11b

Дата и время публикации : 2010-09-28T20:01:40Z

Авторы публикации и институты :
Teruyuki Hirano
Norio Narita
Avi Shporer
Bun’ei Sato
Wako Aoki
Motohide Tamura

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 6 pages, 2 figures, submitted to PASJ
Первичная категория: astro-ph.EP

Все категории : astro-ph.EP

Краткий обзор статьи: 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.

Category: Physics