论文标题
FIES/NOT和TULL/MCDONALD光谱仪检测到的三个巨型行星的确认和表征
Confirmation and characterisation of three giant planets detected by TESS from the FIES/NOT and Tull/McDonald spectrographs
论文作者
论文摘要
我们报告了TOI-1820〜B，TOI-2025〜B和TOI-2158〜B的确认和表征，这是苔丝检测到的G型星的短周期轨道上的三个木星大小的行星。通过使用FIES和TULL光谱仪的基于地面的努力，我们确认了这些行星并描述了它们的轨道，并发现TOI-1820〜B，TOI-2025〜B和TOI-2158〜B的周期约为$ 4.9 $ 〜d，$ 8.9 $ 〜D和$ 8.6 $ 〜D。行星的尺寸范围为0.96至1.14木星半径，其质量在0.8至4.4木星质量范围内。对于两个系统，即TOI-2025和TOI-2158，我们看到了径向速度的长期趋势，表明这两个系统中的每个系统中都存在外伴侣。对于TOI-2025，我们此外，我们发现恒星与轨道井井有条，预计的斜率为$ 9^{+33} _ { - 31} $〜$^\ circ $。由于这些行星都在相对明亮的系统（v $ \ sim $ 10.9-11.6 mag）中发现，因此它们非常适合进一步研究，这可以帮助阐明热和温暖的木星的形成和迁移。
We report the confirmation and characterisation of TOI-1820~b, TOI-2025~b, and TOI-2158~b, three Jupiter-sized planets on short-period orbits around G-type stars detected by TESS. Through our ground-based efforts using the FIES and Tull spectrographs, we have confirmed these planets and characterised their orbits, and find periods of around $4.9$~d, $8.9$~d, and $8.6$~d for TOI-1820~b, TOI-2025~b, and TOI-2158~b, respectively. The sizes of the planets range from 0.96 to 1.14 Jupiter radii, and their masses are in the range from 0.8 to 4.4 Jupiter masses. For two of the systems, namely TOI-2025 and TOI-2158, we see a long-term trend in the radial velocities, indicating the presence of an outer companion in each of the two systems. For TOI-2025 we furthermore find the star to be well-aligned with the orbit, with a projected obliquity of $9^{+33}_{-31}$~$^\circ$. As these planets are all found in relatively bright systems (V$\sim$10.9-11.6 mag), they are well-suited for further studies, which could help shed light on the formation and migration of hot and warm Jupiters.
