%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