%0 Journal Article
%T The Obliquity of HIP 67522 b: A 17 Myr Old Transiting Hot, Jupiter-sized Planet
%+ Institut de recherche en astrophysique et planétologie (IRAP)
%A Heitzmann, Alexis
%A Zhou, George
%A Quinn, Samuel N.
%A Marsden, Stephen C.
%A Wright, Duncan
%A Petit, Pascal
%A Vanderburg, Andrew M.
%A Bouma, Luke G.
%A Mann, Andrew W.
%A Rizzuto, Aaron C.
%< avec comité de lecture
%J The Astrophysical Journal Letters
%V 922
%8 2021
%D 2021
%Z 2109.04174
%Z 2021ApJ...922L...1H
%R 10.3847/2041-8213/ac3485
%K Exoplanet astronomy
%K Exoplanet systems
%K Planetary alignment
%K Planet formation
%K Radial velocity
%K Transit photometry
%Z Sciences of the Universe [physics]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X HIP 67522 b is a 17 Myr old, close-in (Porb = 6.96 days), Jupiter-sized (R = 10 R⊕) transiting planet orbiting a Sun-like star in the Sco-Cen OB association. We present our measurement of the system's projected orbital obliquity via two spectroscopic transit observations using the CHIRON spectroscopic facility. We present a global model that accounts for large surface brightness features typical of such young stars during spectroscopic transit observations. With a value of $| \lambda | ={5.8}_{-5.7}^{{+2.8}^\circ} $ it is unlikely that this well-aligned system is the result of a high-eccentricity-driven migration history. By being the youngest planet with a known obliquity, HIP 67522 b holds a special place in contributing to our understanding of giant planet formation and evolution. Our analysis shows the feasibility of such measurements for young and very active stars.
%G English
%2 https://insu.hal.science/insu-03672381/document
%2 https://insu.hal.science/insu-03672381/file/Heitzmann_2021_ApJL_922_L1.pdf
%L insu-03672381
%U https://insu.hal.science/insu-03672381
%~ IRD
%~ INSU
%~ METEO
%~ UNIV-TLSE3
%~ CNRS
%~ CNES
%~ OMP
%~ OMP-IRAP
%~ UNIV-UT3
%~ UT3-INP
%~ UT3-TOULOUSEINP