Kavli Affiliate: Avi Shporer
| First 5 Authors: Allyson Bieryla, Jiayin Dong, George Zhou, Jason D. Eastman, L. C. Mayorga
| Summary:
We report the discovery and characterization of TOI-2005b, a warm Jupiter on
an eccentric (e~0.59), 17.3-day orbit around a V_mag = 9.867 rapidly rotating
F-star. The object was detected as a candidate by TESS and the planetary nature
of TOI-2005b was then confirmed via a series of ground-based photometric,
spectroscopic, and diffraction-limited imaging observations. The planet was
found to reside in a low sky-projected stellar obliquity orbit (lambda = 4.8
degrees) via a transit spectroscopic observation using the Magellan MIKE
spectrograph.TOI-2005b is one of a few planets known to have a low-obliquity,
high-eccentricity orbit, which may be the result of high-eccentricity coplanar
migration. The planet has a periastron equilibrium temperature of ~ 2100 K,
similar to some highly irradiated hot Jupiters where atomic metal species have
been detected in transmission spectroscopy, and varies by almost 1000 K during
its orbit. Future observations of the atmosphere of TOI-2005b can inform us
about its radiative timescales thanks to the rapid heating and cooling of the
planet.
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