English

Three Warm Jupiters around Solar-analog stars detected with TESS

Earth and Planetary Astrophysics 2024-02-28 v1

Abstract

We report the discovery and characterization of three giant exoplanets orbiting solar-analog stars, detected by the \tess space mission and confirmed through ground-based photometry and radial velocity (RV) measurements taken at La Silla observatory with \textit{FEROS}. TOI-2373\,b is a warm Jupiter orbiting its host star every \sim 13.3 days, and is one of the two most massive known exoplanet with a precisely determined mass and radius around a star similar to the Sun, with an estimated mass of mp_p = 9.30.2+0.2Mjup9.3^{+0.2}_{-0.2}\,M_{\mathrm{jup}}, and a radius of rpr_p = 0.930.2+0.2Rjup0.93^{+0.2}_{-0.2}\,R_{\mathrm{jup}}. With a mean density of ρ=14.41.0+0.9gcm3\rho = 14.4^{+0.9}_{-1.0}\,\mathrm{g\,cm}^{-3}, TOI-2373\,b is among the densest planets discovered so far. TOI-2416\,b orbits its host star on a moderately eccentric orbit with a period of \sim 8.3 days and an eccentricity of ee = 0.320.02+0.020.32^{+0.02}_{-0.02}. TOI-2416\,b is more massive than Jupiter with mpm_p = 3.00.09+0.10Mjup^{+0.10}_{-0.09}\,M_{\mathrm{jup}}, however is significantly smaller with a radius of rpr_p = 0.880.02+0.02,Rjup0.88^{+0.02}_{-0.02},R_{\mathrm{jup}}, leading to a high mean density of ρ=5.40.3+0.3gcm3\rho = 5.4^{+0.3}_{-0.3}\,\mathrm{g\,cm}^{-3}. TOI-2524\,b is a warm Jupiter near the hot Jupiter transition region, orbiting its star every \sim 7.2 days on a circular orbit. It is less massive than Jupiter with a mass of mpm_p = 0.640.04+0.04Mjup0.64^{+0.04}_{-0.04}\,M_{\mathrm{jup}}, and is consistent with an inflated radius of rpr_p = 1.000.03+0.02Rjup1.00^{+0.02}_{-0.03}\,R_{\mathrm{jup}}, leading to a low mean density of ρ=0.790.08+0.08gcm3\rho = 0.79^{+0.08}_{-0.08}\,\mathrm{g\,cm}^{-3}. The newly discovered exoplanets TOI-2373\,b, TOI-2416\,b, and TOI-2524\,b have estimated equilibrium temperatures of 86010+10860^{+10}_{-10} K, 108010+101080^{+10}_{-10} K, and 110020+201100^{+20}_{-20} K, respectively, placing them in the sparsely populated transition zone between hot and warm Jupiters.

Keywords

Cite

@article{arxiv.2402.17592,
  title  = {Three Warm Jupiters around Solar-analog stars detected with TESS},
  author = {Jan Eberhardt and Melissa J. Hobson and Thomas Henning and Trifon Trifonov and Rafael Brahm and Nestor Espinoza and Andrés Jordán and Daniel Thorngren and Remo Burn and Felipe I. Rojas and Paula Sarkis and Martin Schlecker and Marcelo Tala Pinto and Khalid Barkaoui and Richard P. Schwarz and Olga Suarez and Tristan Guillot and Amaury H. M. J. Triaud and Maximilian N. Günther and Lyu Abe and Gavin Boyle and Rodrigo Leiva and Vincent Suc and Phil Evans and Nick Dunckel and Carl Ziegler and Ben Falk and William Fong and Alexander Rudat and Avi Shporer and Stephanie Striegel and David Watanabe and Jon M. Jenkins and Sara Seager and Joshua N. Winn},
  journal= {arXiv preprint arXiv:2402.17592},
  year   = {2024}
}