TS23/McDonald 与 FIES/NOT 再次出击:两个新的暖木星系统及第三个系统中的外部伴星
TS23/McDonald and FIES/NOT strike again. Two new warm Jupiter systems and outer companions in a third
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中文总结 AI 辅助
通过TESS光度与TS23/FIES径向速度联合拟合,发现并表征两个新暖木星TOI-5120 b和TOI-5699 b,修正TOI-2158 b参数,并探测到其外部伴星TOI-2158 c及可能的宽轨道伴星,揭示暖木星多样化的形成路径。
中文摘要 AI 辅助
暖木星(轨道周期 P~8-200 天的气态巨行星)被认为基本不受潮汐相互作用的影响,而潮汐相互作用可能抹去热木星动力学历史的信息。因此,它们的轨道偏心率(e)和恒星自转轴倾斜角预计得以保存,使其成为研究巨行星形成与迁移的重要探针。我们的目标是识别并刻画凌星暖木星,以扩充具有良好表征的系统样本,并推动对巨行星形成与迁移的进一步研究。我们分析了 TESS 凌星光度数据以及地基径向速度测量,并对来自 TS23 和 FIES 光谱仪的光度与光谱数据进行了联合拟合,以确定行星及轨道参数。我们报告了两个新的凌星暖木星的发现与表征:TOI-5120 b(M_p = 1.23±0.05 M_木星,R_p = 0.969±0.017 R_木星,P = 24.91645±0.00002 天,e = 0.10±0.02)和 TOI-5699 b(M_p = 0.25±0.03 M_木星,R_p = 0.996±0.015 R_木星,P = 22.01850±0.00004 天,e = 0.30^{+0.09}_{-0.08})。我们还修正了已知暖木星 TOI-2158 b 的参数(M_p = 0.87±0.04 M_木星,R_p = 0.899±0.015 R_木星,P = 8.60079^{+0.00002}_{-0.00001} 天,e = 0.028^{+0.013}_{-0.014})。此外,我们探测到一个外部行星伴星 TOI-2158 c(M_p sin i = 1.62±0.13 M_木星,P = 414.5^{+1.5}_{-1.6} 天,e = 0.54±0.04),并识别出一个长期径向速度趋势,可能表明存在另一个宽轨道上的行星伴星。这些系统多样化的架构,特别是外部伴星的有无,突显了通向暖木星的多种动力学路径。
英文摘要
Warm Jupiters (gas giant planets with orbital periods of P$\sim$8-200 d) are thought to be largely unaffected by the tidal interactions that can erase information about the dynamical histories of hot Jupiters. Their orbital eccentricities ($e$) and stellar obliquities are therefore expected to be preserved, making them valuable probes of giant-planet formation and migration. Our aim is to identify and characterise transiting warm Jupiters in order to expand the sample of well-characterised systems and enable further studies of giant-planet formation and migration. We analyse TESS transit photometry together with ground-based radial velocity measurements and perform a joint fit of the photometric and spectroscopic data from the TS23 and FIES spectrographs to determine the planetary and orbital parameters. We report on the discovery and characterisation of two new, transiting warm Jupiters; TOI-5120 b ($M_p = 1.23\pm0.05$ M$_{\rm Jup}$, $R_p = 0.969\pm0.017$ R$_{\rm Jup}$, $P = 24.91645\pm0.00002$ d, $e = 0.10\pm0.02$) and TOI-5699 b ($M_p = 0.25\pm0.03$ M$_{\rm Jup}$, $R_p = 0.996\pm0.015$ R$_{\rm Jup}$, $P = 22.01850\pm0.00004$ d, $e = 0.30^{+0.09}_{-0.08}$). We also refine the parameters of the known warm Jupiter TOI-2158 b ($M_p = 0.87\pm0.04$ M$_{\rm Jup}$, $R_p = 0.899\pm0.015$ R$_{\rm Jup}$, $P = 8.60079^{+0.00002}_{-0.00001}$ d, $e = 0.028^{+0.013}_{-0.014}$). In addition, we detect an outer planetary companion, TOI-2158 c ($M_p \sin i = 1.62\pm0.13$ M$_{\rm Jup}$, $P = 414.5^{+1.5}_{-1.6}$ d, $e = 0.54\pm0.04$), and identify a long-term radial velocity trend that may indicate another planetary companion on a wide orbit. The diverse architectures of these systems, in particular the presence and absence of outer companions, highlight the range of dynamical pathways leading to warm Jupiters.
发表机构
- Aarhus University(奥胡斯大学)
- Università degli Studi di Torino(都灵大学)
- The University of Texas, Austin(德克萨斯大学奥斯汀分校)
- Chalmers University of Technology(查尔姆斯理工大学)
- University of Birmingham(伯明翰大学)
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