학술논문
Spinning up a Daze: TESS Uncovers a Hot Jupiter orbiting the Rapid-Rotator TOI-778
Document Type
Working Paper
Author
Clark, Jake; Addison, Brett; Okumura, Jack; Vach, Sydney; Heitzmann, Alexis; Rodriguez, Joseph; Wright, Duncan; Clerte, Mathieu; Brown, Carolyn; Fetherolf, Tara; Wittenmyer, Robert; Plavchan, Peter; Kane, Stephen; Horner, Jonathan; Kielkopf, John; Shporer, Avi; Tinney, C.; Hui-Gen, Liu; Ballard, Sarah; Bowler, Brendan; Mengel, Matthew; Zhou, George; Lee, Annette; David, Avelyn; Heim, Jessica; Lee, Michele; Sevilla, Veronica; Zafar, Naqsh; Hinkel, Natalie; Allen, Bridgette; Bayliss, Daniel; Berberyan, Arthur; Berlind, Perry; Bieryla, Allyson; Bouchy, Francois; Brahm, Rafael; Bryant, Edward; Christiansen, Jessie; Ciardi, David; Ciardi, Krys; Collins, Karen; Dallant, Jules; Davis, Allen; Diaz, Matias; Dressing, Courtney; Esquerdo, Gilbert; Harre, Jan-Vincent; Howell, Steve; Jenkins, Jon; Jensen, Eric; Jones, Matias; Jordan, Andres; Latham, David; Lund, Michael; McCormac, James; Nielsen, Louise; Otegi, Jon; Quinn, Samuel; Radford, Don; Ricker, George; Schwarz, Richard; Seager, Sara; Smith, Alexis; Stockdale, Chris; Tan, Thiam-Guan; Udry, Stephane; Vanderspek, Roland; Gunther, Maximilian; Wang, Songhu; Wingham, Geof; Winn, Joshua
Source
AJ 165 207 (2023)
Subject
Language
Abstract
NASA's Transiting Exoplanet Survey Satellite (TESS) mission, has been uncovering a growing number of exoplanets orbiting nearby, bright stars. Most exoplanets that have been discovered by TESS orbit narrow-line, slow-rotating stars, facilitating the confirmation and mass determination of these worlds. We present the discovery of a hot Jupiter orbiting a rapidly rotating ($v\sin{(i)}= 35.1\pm1.0$km/s) early F3V-dwarf, HD115447 (TOI-778). The transit signal taken from Sectors 10 and 37 of TESS's initial detection of the exoplanet is combined with follow-up ground-based photometry and velocity measurements taken from Minerva-Australis, TRES, CORALIE and CHIRON to confirm and characterise TOI-778b. A joint analysis of the light curves and the radial velocity measurements yield a mass, radius, and orbital period for TOI-778b of $2.76^{+0.24}_{-0.23}$Mjup, $1.370\pm0.043$Rjup and $\sim4.63$ days, respectively. The planet orbits a bright ($V = 9.1$mag) F3-dwarf with $M=1.40\pm0.05$Msun, $R=1.70\pm0.05$Rsun, and $\log g=4.05\pm0.17$. We observed a spectroscopic transit of TOI-778b, which allowed us to derive a sky-projected spin-orbit angle of $18^{\circ}\pm11^{\circ}$, consistent with an aligned planetary system. This discovery demonstrates the capability of smaller aperture telescopes such as Minerva-Australis to detect the radial velocity signals produced by planets orbiting broad-line, rapidly rotating stars.
Comment: 18 pages, 9 figures, and 4 tables. Submitted to the Astronomical Journal
Comment: 18 pages, 9 figures, and 4 tables. Submitted to the Astronomical Journal