| dc.description.abstract | © 2020. The Author(s). Published by the American Astronomical Society. We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT survey and subsequently confirmed by Transiting Exoplanet Survey Satellite (TESS) photometry. KELT-25 b is on a 4.40 day orbit around the V = 9.66 star CD-24 5016 (Teff=8280-180+440 K, M ∗ = 2.18-0.11+0.12 M o˙), while KELT-26 b is on a 3.34 day orbit around the V = 9.95 star HD 134004 (Teff = 8640-240+500 K, M ∗ = 1.93-0.16+0.14 M o˙), which is likely an Am star. We have confirmed the substellar nature of both companions through detailed characterization of each system using ground-based and TESS photometry, radial velocity measurements, Doppler tomography, and high-resolution imaging. For KELT-25, we determine a companion radius of R P = 1.64-0.043+0.039 R J and a 3σ upper limit on the companion's mass of ∼64 M J. For KELT-26 b, we infer a planetary mass and radius of M P = 1.41-0.51+0.43MJ and R P = 1.94-0.058+0.060 R J. From Doppler tomographic observations, we find KELT-26 b to reside in a highly misaligned orbit. This conclusion is weakly corroborated by a subtle asymmetry in the transit light curve from the TESS data. KELT-25 b appears to be in a well-aligned, prograde orbit, and the system is likely a member of the cluster Theia 449. | en_US |
| dspace.orderedauthors | Martínez, RR; Gaudi, BS; Rodriguez, JE; Zhou, G; Labadie-Bartz, J; Quinn, SN; Penev, K; Tan, T-G; Latham, DW; Paredes, LA; Kielkopf, JF; Addison, B; Wright, DJ; Teske, J; Howell, SB; Ciardi, D; Ziegler, C; Stassun, KG; Johnson, MC; Eastman, JD; Siverd, RJ; Beatty, TG; Bouma, L; Bedding, T; Pepper, J; Winn, J; Lund, MB; Villanueva, S; Stevens, DJ; Jensen, ELN; Kilby, C; Crane, JD; Tokovinin, A; Everett, ME; Tinney, CG; Fausnaugh, M; Cohen, DH; Bayliss, D; Bieryla, A; Cargile, PA; Collins, KA; Conti, DM; Colón, KD; Curtis, IA; Depoy, DL; Evans, P; Feliz, DL; Gregorio, J; Rothenberg, J; James, DJ; Joner, MD; Kuhn, RB; Manner, M; Khakpash, S; Marshall, JL; McLeod, KK; Penny, MT; Reed, PA; Relles, HM; Stephens, DC; Stockdale, C; Trueblood, M; Trueblood, P; Yao, X; Zambelli, R; Vanderspek, R; Seager, S; Jenkins, JM; Henry, TJ; James, H-S; Jao, W-C; Wang, SX; Butler, P; Thompson, I; Shectman, S; Wittenmyer, R; Bowler, BP; Horner, J; Kane, SR; Mengel, MW; Morton, TD; Okumura, J; Plavchan, P; Zhang, H; Scott, NJ; Matson, RA; Mann, AW; Dragomir, D; Günther, M; Ting, EB; Glidden, A; Quintana, EV | en_US |
