학술논문
TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data
Document Type
Working Paper
Author
Kostov, Veselin B.; Powell, Brian P.; Orosz, Jerome A.; Welsh, William F.; Cochran, William; Collins, Karen A.; Endl, Michael; Hellier, Coel; Latham, David W.; MacQueen, Phillip; Pepper, Joshua; Quarles, Billy; Sairam, Lalitha; Torres, Guillermo; Wilson, Robert F.; Bergeron, Serge; Boyce, Pat; Bieryla, Allyson; Buchheim, Robert; Christiansen, Caleb Ben; Ciardi, David R.; Collins, Kevin I.; Conti, Dennis M.; Dixon, Scott; Guerra, Pere; Haghighipour, Nader; Herman, Jeffrey; Hintz, Eric G.; Howard, Ward S.; Jensen, Eric L. N.; Kielkopf, John F.; Kruse, Ethan; Law, Nicholas M.; Martin, David; Maxted, Pierre F. L.; Montet, Benjamin T.; Murgas, Felipe; Nelson, Matt; Olmschenk, Greg; Otero, Sebastian; Quimby, Robert; Richmond, Michael; Schwarz, Richard P.; Shporer, Avi; Stassun, Keivan G.; Stephens, Denise C.; Triaud, Amaury H. M. J.; Ulowetz, Joe; Walter, Bradley S.; Wiley, Edward; Wood, David; Yenawine, Mitchell; Agol, Eric; Barclay, Thomas; Beatty, Thomas G.; Boisse, Isabelle; Caldwell, Douglas A.; Christiansen, Jessie; Colon, Knicole D.; Deleuil, Magali; Doyle, Laurance; Fabrycky, Daniel; Fausnaugh, Michael; Furesz, Gabor; Gilbert, Emily A.; Hebrard, Guillaume; James, David J.; Jenkins, Jon; Kane, Stephen R.; Kidwell Jr., Richard C.; Kopparapu, Ravi; Li, Gongjie; Lissauer, Jack J.; Lund, Michael B.; Majewski, Steve; Mazeh, Tsevi; Quinn, Samuel N.; Quintana, Elisa; Ricker, George; Rodriguez, Joseph E.; Rowe, Jason; Santerne, Alexander; Schlieder, Joshua; Seager, Sara; Standing, Matthew R.; Stevens, Daniel J.; Ting, Eric B.; Vanderspek, Roland; Winn, Joshua N.
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Subject
Language
Abstract
We report the first discovery of a transiting circumbinary planet detected from a single sector of TESS data. During Sector 21, the planet TIC 172900988b transited the primary star and then 5 days later it transited the secondary star. The binary is itself eclipsing, with a period of P = 19.7 days and an eccentricity of e = 0.45. Archival data from ASAS-SN, Evryscope, KELT, and SuperWASP reveal a prominent apsidal motion of the binary orbit, caused by the dynamical interactions between the binary and the planet. A comprehensive photodynamical analysis of the TESS, archival and follow-up data yields stellar masses and radii of M1 = 1.2384 +/- 0.0007 MSun and R1 = 1.3827 +/- 0.0016 RSun for the primary and M2 = 1.2019 +/- 0.0007 MSun and R2 = 1.3124 +/- 0.0012 RSun for the secondary. The radius of the planet is R3 = 11.25 +/- 0.44 REarth (1.004 +/- 0.039 RJup). The planet's mass and orbital properties are not uniquely determined - there are six solutions with nearly equal likelihood. Specifically, we find that the planet's mass is in the range of 824 < M3 < 981 MEarth (2.65 < M3 < 3.09 MJup), its orbital period could be 188.8, 190.4, 194.0, 199.0, 200.4, or 204.1 days, and the eccentricity is between 0.02 and 0.09. At a V = 10.141 mag, the system is accessible for high-resolution spectroscopic observations, e.g. Rossiter-McLaughlin effect and transit spectroscopy.
Comment: 57 pages, 30 figures, 25 tables; Accepted AJ
Comment: 57 pages, 30 figures, 25 tables; Accepted AJ