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arXiv 2609.19277astro-ph.EP

HD 3167 是否拥有垂直轨道的行星?

Does HD 3167 Have Planets with Perpendicular Orbits?

Joshua N. Winn, Jack Lubin, Guðmundur Stefánsson, Haochuan Yu, Erik Petigura, Howard Isaacson, Andrew W. Howard, Fei Dai

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中文总结 AI 辅助

本研究通过新观测数据分析,质疑 HD 3167 系统行星垂直轨道的先前结论,发现其更可能共面,但几何结构仍不确定。

中文摘要 AI 辅助

据报道,HD 3167 的两颗凌星行星遵循近乎垂直的路径,其中内行星的轨道与恒星赤道对齐,而外行星的轨道几乎为极向。这一解释关键依赖于对内行星 Rossiter-McLaughlin 效应的一次具有挑战性的单次凌星探测。我们使用凯克行星探测器(Keck Planet Finder)观测了内行星的另外三次凌星,并将新数据与两组档案中的 ESPRESSO 凌星数据集一起分析。我们未能确认先前报道的低倾角。我们的分析倾向于投影倾角为 $-66^{+14}_{-12}$ 度,这与共面轨道一致。然而,由于最佳拟合的投影自转速度高于预期,且当五个凌星数据集中最不一致的一个被省略时,倾角的不确定性大幅增加,我们认为 HD 3167 系统的几何结构仍悬而未决。

英文摘要

The two transiting planets of HD 3167 were reported to follow nearly perpendicular paths, with the inner orbit aligned with the stellar equator and the outer orbit nearly polar. This interpretation depends critically on a challenging single-transit detection of the Rossiter-McLaughlin effect of the inner planet. We observed three additional transits of the inner planet with the Keck Planet Finder and analyzed the new data together with two archival ESPRESSO transit datasets. We do not confirm the previously reported low obliquity. Our analysis favors a projected obliquity of $-66^{+14}_{-12}$ degrees, consistent with coplanar orbits. However, because the best-fit projected rotation velocity is higher than expected, and because the obliquity uncertainty grows substantially when the most discrepant of the five transit datasets is omitted, we regard the geometry of the HD 3167 system as still unsettled.

发表机构

  • Princeton University(普林斯顿大学)
  • University of California Los Angeles(加州大学洛杉矶分校)
  • University of Amsterdam(阿姆斯特丹大学)
  • Schmidt Sciences(施密特科学)
  • University of Oxford(牛津大学)
  • University of California at Berkeley(加州大学伯克利分校)
  • California Institute of Technology(加州理工学院)
  • University of Hawaii(夏威夷大学)

机构由 AI 辅助整理,请以论文原文为准。

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