تقرير
Gravity-Darkening Analysis of Misaligned Hot Jupiter MASCARA-4 b
| العنوان: | Gravity-Darkening Analysis of Misaligned Hot Jupiter MASCARA-4 b |
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| المؤلفون: | Ahlers, John P., Kruse, Ethan, Colon, Knicole D., Dorval, Patrick, Talens, Geert Jan, Snellen, Ignas, Albrecht, Simon, Otten, Gilles, Ricker, George, Vanderspek, Roland, Latham, David, Seager, Sara, Winn, Joshua, Jenkins, Jon M., Haworth, Kari, Cartwright, Scott, Morris, Robert, Rowden, Pam, Tenenbaum, Peter, TIng, Eric B. |
| سنة النشر: | 2019 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | MASCARA-4 b is a hot Jupiter in a highly-misaligned orbit around a rapidly-rotating A3V star that was observed for 54 days by the Transiting Exoplanet Survey Satellite (\tess). We perform two analyses of MASCARA-4 b using a stellar gravity-darkened model. First, we measure MASCARA-4 b's misaligned orbital configuration by modeling its \tess~photometric light curve. We take advantage of the asymmetry in MASCARA-4 b's transit due to its host star's gravity-darkened surface to measure MASCARA-4 b's true spin-orbit angle to be $104^{\circ+7^\circ}_{-13^\circ}$. We also detect a $\sim4\sigma$ secondary eclipse at $0.491\pm0.007$ orbital phase, proving that the orbit is slightly eccentric. Second, we model MASCARA-4 b's insolation including gravity-darkening and find that the planet's received XUV flux varies by $4$\% throughout its orbit. MASCARA-4 b's short-period, polar orbit suggests that the planet likely underwent dramatic orbital evolution to end up in its present-day configuration and that it receives a varying stellar irradiance that perpetually forces the planet out of thermal equilibrium. These findings make MASCARA-4 b an excellent target for follow-up characterization to better understand orbital evolution and current-day of planets around high-mass stars. Comment: Accepted for publication in ApJ |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/ab59d0 |
| URL الوصول: | http://arxiv.org/abs/1911.05025 |
| رقم الأكسشن: | edsarx.1911.05025 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/ab59d0 |
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