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| DOI | 10.1088/2041-8205/814/1/L16 | ||||
| Año | 2015 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We report a spin-orbit misalignment for the hot-Jupiter HATS-14b, measuring a projected orbital obliquity of vertical bar lambda vertical bar = 76(-5)(+4) degrees. HATS-14b orbits a high metallicity, 5400 K G dwarf in a relatively short period orbit of 2.8 days. This obliquity was measured via the Rossiter-McLaughlin effect, obtained with observations from Keck-HIRES. The velocities were extracted using a novel technique, optimized for low signal-to-noise spectra, achieving a high precision of 4 m s(-1) point-to-point scatter. However, we caution that our uncertainties may be underestimated. Due to the low rotational velocity of the star, the detection significance is dependent on the v sin i prior that is imposed in our modeling. Based on trends observed in the sample of hot Jupiters with obliquity measurements, it has been suggested that these planets modify the spin axes of their host stars, with an efficiency that depends on the stellar type and orbital period of the system. In this framework, short-period planets around stars with surface convective envelopes, like HATS-14b, are expected to have orbits that are aligned with the spin axes of their host stars. HATS-14b, however, is a significant outlier from this trend, challenging the effectiveness of the tidal realignment mechanism.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Zhou, George | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Australian Natl Univ - Australia Harvard-Smithsonian Center for Astrophysics - Estados Unidos Australian National University - Australia The Australian National University - Australia |
| 2 | Bayliss, Dan | Hombre |
Univ Geneva - Suiza
Université de Genève - Suiza Faculty of Science - Suiza |
| 3 | Hartman, Joel D. | Hombre |
Princeton Univ - Estados Unidos
Princeton University - Estados Unidos |
| 4 | Fulton, Benjamin | Hombre |
Univ Hawaii Manoa - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 5 | Bakos, Gaspar | Hombre |
Princeton Univ - Estados Unidos
Princeton University - Estados Unidos |
| 6 | Howard, Andrew W. | Hombre |
Univ Hawaii Manoa - Estados Unidos
University of Hawaii at Manoa - Estados Unidos University Hawaii Institute for Astronomy - Estados Unidos |
| 7 | Isaacson, Howard | Hombre |
UNIV CALIF BERKELEY - Estados Unidos
University of California, Berkeley - Estados Unidos |
| 8 | Marcy, Geoff | Hombre |
UNIV CALIF BERKELEY - Estados Unidos
University of California, Berkeley - Estados Unidos |
| 9 | Schmidt, Brian | Hombre |
Australian Natl Univ - Australia
Australian National University - Australia The Australian National University - Australia |
| 10 | BRAHM-SCOTT, RAFAEL ANDRES | Hombre |
Pontificia Universidad Católica de Chile - Chile
Instituto Milenio de Astrofísica - Chile |
| 11 | JORDAN-COLZANI, ANDRES CRISTOBAL | Hombre |
Pontificia Universidad Católica de Chile - Chile
Instituto Milenio de Astrofísica - Chile Centro de Excelencia en Astrofísica y Tecnologías Afines - Chile |
| Agradecimiento |
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| Work at the Australian National University is supported by ARC Laureate Fellowship Grant FL0992131. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. G.Z. thanks helpful discussions with Simon Albrecht. |