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TOI-4495: A Pair of Aligned, Near-resonant Sub-Neptunes That Likely Experienced Overstable Migration

  • Authors: Mu-Tian Wang, 王 牧天, Fei Dai, 戴 飞, Hui-Gen Liu, 刘 慧根, Kento Masuda, Andrew W. Howard, Samuel Halverson, Howard Isaacson, Elina Y. Zhang, Max Goldberg, Huan-Yu Teng, Ryan A. Rubenzahl, Benjamin Fulton, Erik A. Petigura, Steven Giacalone, Luke Handley, David W. Latham, Allyson Bieryla, Ashley Baker, Jerry Edelstein, Steven R. Gibson, Kodi Rider, Arpita Roy, Chris Smith, Josh Walawender, David Rapetti, Jon M. Jenkins, Joshua N. Winn

Mu-Tian Wang et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 1.

Left: RV variations during transit of TOI-4495 c (RM effect). The black points are KPF data, and the red curve shows the best-fit RM model with sky-projected stellar obliquity of ﹩\lambda =-2.{3}_{-7.8}^{+8.3}\,^\circ ﹩. The bottom panel shows the residuals of the data subtracted by the best-fit model. Right: line-profile residuals as a function of time and velocity. The vertical black dashed lines mark the ﹩v\sin {i}_{* }=6.8\pm 0.6﹩ km s−1 of the host star. The horizontal black dashed lines indicate the ingress and egress timing of transit. The blue diagonal feature, extending from −6.8 km s−1 at ingress to 6.8 km s−1 at egress, represents the Doppler shadow of TOI-4495 c and is consistent with a well-aligned orbit.

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