TESS Hunt for Young and Maturing Exoplanets (THYME). II. A 17Myr Old Transiting Hot Jupiter in the Sco-Cen Association

Rizzuto, Aaron C. and Newton, Elisabeth R. and Mann, Andrew W. and Tofflemire, Benjamin M. and Vanderburg, Andrew and Kraus, Adam L. and Wood, Mackenna L. and Quinn, Samuel N. and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Thao, Pa Chia and Law, Nicholas M. and Ziegler, Carl and Briceno, Cesar (2020) TESS Hunt for Young and Maturing Exoplanets (THYME). II. A 17Myr Old Transiting Hot Jupiter in the Sco-Cen Association. The Astronomical Journal, 160 (1):33. pp. 1-14. ISSN 0004-6256

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We present the discovery of a transiting hot Jupiter orbiting HIP 67522 (T eff ∼ 5650 K; M ∗ ∼ 1.2M o˙) in the 10-20 Myr old Sco-Cen OB association. We identified the transits in the TESS data using our custom notch filter planet search pipeline and characterize the system with additional photometry from Spitzer; spectroscopy from SOAR/Goodman, SALT/HRS, LCOGT/NRES, and SMARTS/CHIRON; and speckle imaging from SOAR/HRCam. We model the photometry as a periodic Gaussian process with transits to account for stellar variability and find an orbital period of 6.9596+0.0000150-000016days and radius of10.02-0.53+0.54R⊕. We also identify a single transit of an additional candidate planet with radius 8.01-0.710.75R ⊕ that has an orbital period of ⪆23 days. The validated planet HIP 67522b is currently the youngest transiting hot Jupiter discovered and is an ideal candidate for transmission spectroscopy and radial velocity follow-up studies, while also demonstrating that some young giant planets either form in situ at small orbital radii or else migrate promptly from formation sites farther out in the disk.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 09 Feb 2022 05:13
Last Modified: 14 Feb 2022 02:20
Uncontrolled Keywords: Astrophysics - Earth and Planetary; Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/ab94b7
URI: http://eprints.usq.edu.au/id/eprint/45021

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