학술논문
TOI-1859b: A 64-Day Warm Jupiter on an Eccentric and Misaligned Orbit
Document Type
Working Paper
Author
Dong, Jiayin; Wang, Songhu; Rice, Malena; Zhou, George; Huang, Chelsea X.; Dawson, Rebekah I.; Stefánsson, Gudmundur K.; Halverson, Samuel; Kanodia, Shubham; Mahadevan, Suvrath; McElwain, Michael W.; Alvarado-Montes, Jaime A.; Ninan, Joe P.; Robertson, Paul; Roy, Arpita; Schwab, Christian; Logsdon, Sarah E.; Terrien, Ryan C.; Collins, Karen A.; Srdoc, Gregor; Sefako, Ramotholo; Laloum, Didier; Latham, David W.; Bieryla, Allyson; Dalba, Paul A.; Dragomir, Diana; Villanueva Jr., Steven; Howell, Steve B.; Ricker, George R.; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Shporer, Avi; Rapetti, David
Source
Subject
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Abstract
Warm Jupiters are close-in giant planets with relatively large planet-star separations (i.e., $10< a/R_\star <100$). Given their weak tidal interactions with their host stars, measurements of stellar obliquity may be used to probe the initial obliquity distribution and dynamical history for close-in gas giants. Using spectroscopic observations, we confirm the planetary nature of TOI-1859b and determine the stellar obliquity of TOI-1859 to be $\lambda = 38.9^{+2.8}_{-2.7}\deg$ relative to its planetary companion using the Rossiter-McLaughlin effect. TOI-1859b is a 64-day warm Jupiter orbiting around a late-F dwarf and has an orbital eccentricity of $0.57^{+0.12}_{-0.16}$, inferred purely from transit light curves. The eccentric and misaligned orbit of TOI-1859b is likely an outcome of dynamical interactions, such as planet-planet scattering and planet-disk resonance crossing.
Comment: 15 pages, 7 figures, 1 table; accepted to ApJL
Comment: 15 pages, 7 figures, 1 table; accepted to ApJL