Validation of 13 Hot and Potentially Terrestrial TESS Planets
Authors: Giacalone Steven , Dressing Courtney D. , Hedges Christina , Kostov Veselin B. , Collins Karen A. , Jensen Eric L. N. , Yahalomi Daniel A. , Bieryla Allyson , Ciardi David R. , Howell Steve B. , Lillo-Box Jorge , Barkaoui Khalid , Winters Jennifer G. , Matthews Elisabeth , Livingston John H. , Quinn Samuel N. , Safonov Boris S. , Cadieux Charles , Furlan E. , Crossfield Ian J. M. , Mandell Avi M. , Gilbert Emily A. , Kruse Ethan , Quintana Elisa V. , Ricker George R. , Seager S. , Winn Joshua N. , Jenkins Jon M. , Duffy Adkins Britt , Baker David , Barclay Thomas , Barrado David , Batalha Natalie M. , Belinski Alexander A. , Benkhaldoun Zouhair , Buchhave Lars A. , Cacciapuoti Luca , Charbonneau David , Chontos Ashley , Christiansen Jessie L. , Cloutier Ryan , Collins Kevin I. , Conti Dennis M. , Cutting Neil , Dixon Scott , Doyon René , Mufti Mohammed El , Esparza-Borges Emma , Essack Zahra , Fukui Akihiko , Gan Tianjun , Gary Kaz , Ghachoui Mourad , Gillon Michaël , Girardin Eric , Glidden Ana , Gonzales Erica J. , Guerra Pere , Horch Elliott P. , Hełminiak Krzysztof G. , Howard Andrew W. , Huber Daniel , Irwin Jonathan M. , Isopi Giovanni , Jehin Emmanuël , Kagetani Taiki , Kane Stephen R. , Kawauchi Kiyoe , Kielkopf John F. , Lewin Pablo , Luker Lindy , Lund Michael B. , Mallia Franco , Mao Shude , Massey Bob , Matson Rachel A. , Mireles Ismael , Mori Mayuko , Murgas Felipe , Narita Norio , O’Dwyer Tanner , Petigura Erik A. , Polanski Alex S. , Pozuelos Francisco J. , Palle Enric , Parviainen Hannu , Plavchan Peter P. , Relles Howard M. , Robertson Paul , Rose Mark E. , Rowden Pamela , Roy Arpita , Savel Arjun B. , Schlieder Joshua E. , Schnaible Chloe , Schwarz Richard P. , Sefako Ramatholo , Selezneva Aleksandra , Skinner Brett , Stockdale Chris , Strakhov Ivan A. , Tan Thiam-Guan , Torres Guillermo , Tronsgaard René , Twicken Joseph D. , Vermilion David , Waite Ian A. , Walter Bradley , Wang Gavin , Ziegler Carl , Zou Yujie 
Published: January 2022

Abstract
The James Webb Space Telescope will be able to probe the atmospheres and surface properties of hot, terrestrial planets via emission spectroscopy. We identify 18 potentially terrestrial planet candidates detected by the Transiting Exoplanet Survey Satellite (TESS) that would make ideal targets for these observations. These planet candidates cover a broad range of planet radii (R
p ∼ 0.6–2.0R
⊕) and orbit stars of various magnitudes (K

s
= 5.78–10.78, V = 8.4–15.69) and effective temperatures (T
eff ∼ 3000–6000 K). We use ground-based observations collected through the TESS Follow-up Observing Program (TFOP) and two vetting tools—DAVE and TRICERATOPS—to assess the reliabilities of these candidates as planets. We validate 13 planets: TOI-206 b, TOI-500 b, TOI-544 b, TOI-833 b, TOI-1075 b, TOI-1411 b, TOI-1442 b, TOI-1693 b, TOI-1860 b, TOI-2260 b, TOI-2411 b, TOI-2427 b, and TOI-2445 b. Seven of these planets (TOI-206 b, TOI-500 b, TOI-1075 b, TOI-1442 b, TOI-2260 b, TOI-2411 b, and TOI-2445 b) are ultra-short-period planets. TOI-1860 is the youngest (133 ± 26 Myr) solar twin with a known planet to date. TOI-2260 is a young (321 ± 96 Myr) G dwarf that is among the most metal-rich ([Fe/H] = 0.22 ± 0.06 dex) stars to host an ultra-short-period planet. With an estimated equilibrium temperature of ∼2600 K, TOI-2260 b is also the fourth hottest known planet with R
p < 2 R
⊕.