TOI-677b: A Warm Jupiter (P=11.2 days) on an Eccentric Orbit Transiting a Late F-type Star

• Published in: The Astronomical journal 2020-04, Vol.159 (4), p.145
• Main Authors: Jordán, Andrés, Brahm, Rafael, Espinoza, Néstor, Henning, Thomas, Jones, Matías I., Kossakowski, Diana, Sarkis, Paula, Trifonov, Trifon, Rojas, Felipe, Torres, Pascal, Drass, Holger, Nandakumar, Sangeetha, Barbieri, Mauro, Davis, Allen, Wang, Songhu, Bayliss, Daniel, Bouma, Luke, Dragomir, Diana, Eastman, Jason D., Daylan, Tansu, Guerrero, Natalia, Barclay, Thomas, Ting, Eric B, Henze, Christopher E., Ricker, George, Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua, Jenkins, Jon M, Wittenmyer, Robert A., Bowler, Brendan P., Crossfield, Ian, Horner, Jonathan, Kane, Stephen R., Kielkopf, John F., Morton, Timothy D., Plavchan, Peter, Tinney, C. G., Addison, Brett, Mengel, Matthew W., Okumura, Jack, Shahaf, Sahar, Mazeh, Tsevi, Rabus, Markus, Shporer, Avi, Ziegler, Carl, Mann, Andrew W., Hart, Rhodes
• Format: Article
• Language: English
• Subjects: Astronomy; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; Eccentric orbits; Extrasolar planets; F stars; Gas giant planets; Jupiter; Light curve; MAIN SEQUENCE STARS; MASS; METALLICITY; Planet detection; PLANETS; RADIAL VELOCITY; Satellites; Transit
• ISSN: 0004-6256; 1538-3881; 1538-3881
• DOI: 10.3847/1538-3881/ab6f67

We report the discovery of TOI-677b,first identified as a candidate in light curves obtained within Sectors 9 and 10 of the Transiting Exoplanet Survey Satellite(TESS)mission and confirmed with radial velocities. TOI-677b has a mass of M(p) = 1.236(+0.069,- 0.067) M(J), a radius of R(P)=1.170 ± 0.03 R(J), and orbits its bright host star (V = 9.8 mag) with an orbital period of 11.23660 ± 0.00011 d, on an eccentric orbit with e = 0.435 ± 0.024. The host star has a mass of M(*) = 1.181 ± 0.058 M(ʘ), a radius of R(*)= 1.28(+0.03,-0.03) R(ʘ), an age of 2.92 (+0.80,-0.73) Gyr and solar metallicity, properties consistent with a main-sequence late-F star with T(eff)=6295 ± 77K. We find evidence in the radial velocity measurements of a secondary long-term signal, which could be due to an outer companion. The TOI-677 b system is a well-suited target for Rossiter–Mclaughlin observations that can constrain migration mechanisms of close-in giant planets.