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TOI-2005b: An Eccentric Warm Jupiter in Spin-Orbit Alignment

by Henning, Thomas , Triaud, Amaury , Zhou, George , Carter, Brad , Watkins, Christilyn N , Jordán, Andrés , Thiam-Guan Tan , Suarez, Olga , Jenkins, Jon M , Schwarz, Richard P , Villanseñor, Jesus Noel , Ricker, George R , Jones, Matías I , Huang, Chelsea X , Lyu Abe , Seager, Sara , Mayorga, L C , Shporer, Avi , Eastman, Jason D , Ziegler, Carl , Horne, Keith , Hobson, Melissa J , Bieryla, Allyson , Rodriguez, Joseph E , Winn, Joshua N , Latham, David W , Brahm, Rafael , Quinn, Samuel N , Osip, David , Colón, Nicole D , Ting, Eric B , Schulte, Jack , Collins, Karen A , Guillot, Tristan , Dong, Jiayin , Beletsky, Yuri , Vowell, Noah , Vanderburg, Andrew , Ensak, Zahra

in Extrasolar planets / F stars / Gas giant planets / Jupiter / Spectroscopy

2025

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TOI-2005b: An Eccentric Warm Jupiter in Spin-Orbit Alignment

in Extrasolar planets / F stars / Gas giant planets / Jupiter / Spectroscopy

2025

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TOI-2005b: An Eccentric Warm Jupiter in Spin-Orbit Alignment

in Extrasolar planets / F stars / Gas giant planets / Jupiter / Spectroscopy

2025

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Paper

TOI-2005b: An Eccentric Warm Jupiter in Spin-Orbit Alignment

Henning, Thomas,

Triaud, Amaury,

Zhou, George,

Carter, Brad,

Watkins, Christilyn N,

Jordán, Andrés,

Thiam-Guan Tan,

Suarez, Olga,

Jenkins, Jon M,

Schwarz, Richard P,

Villanseñor, Jesus Noel,

Ricker, George R,

Jones, Matías I,

Huang, Chelsea X,

Lyu Abe,

Seager, Sara,

Mayorga, L C,

Shporer, Avi,

Eastman, Jason D,

Ziegler, Carl,

Horne, Keith,

Hobson, Melissa J,

Bieryla, Allyson,

Rodriguez, Joseph E,

Winn, Joshua N,

Latham, David W,

Brahm, Rafael,

Quinn, Samuel N,

Osip, David,

Colón, Nicole D,

Ting, Eric B,

Schulte, Jack,

Collins, Karen A,

Guillot, Tristan,

Dong, Jiayin,

Beletsky, Yuri,

Vowell, Noah,

Vanderburg, Andrew,

Ensak, Zahra

2025

Overview

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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Publisher

Cornell University Library, arXiv.org

Subject

Extrasolar planets

/ F stars

/ Gas giant planets

/ Jupiter

/ Spectroscopy