Another shipment of six short-period giant planets from TESS

Another shipment of six short-period giant planets from TESS
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来自 TESS 的另一批六颗短周期巨行星

DOI:
10.1093/mnras/stad595
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发表时间:
2023
影响因子:
4.8
通讯作者:
Oelkers, Ryan J
Oelkers, Ryan J
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Rodriguez, Joseph E;Quinn, Samuel N;Vanderburg, Andrew;Zhou, George;Eastman, Jason D;Thygesen, Erica;Cale, Bryson;Ciardi, David R;Reed, Phillip A;Oelkers, Ryan J

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本文介绍了从美国宇航局的凌日系外行星调查卫星(TESS)TOI-1811上发现的六颗短周期凌日巨行星的发现和特征(TIC 376524552)、TOI-2025(TIC 394050135)、TOI-2145(TIC 88992642)、TOI-2152(TIC 395393265)、TOI-2154(TIC 428787891)和TOI-2497(TIC 97568467)。所有六颗行星都围绕着明亮的主星(8.9 <G< 11.8,7.7 <K< 10.1)运行。利用TESS后续观测计划工作组的时间序列测光和光谱后续观测的组合,我们已经确定行星的大小为木星大小(RP= 0.99- 1.45 RJ),质量范围为0.92至5.26 MJ,轨道为F,G和K星(4766 ≤ Teff≤ 7360 K)。在我们的样本中,我们检测到三个最长周期系统的显著轨道偏心率:TOI-2025 B(P= 8.872 d,0.394),TOI-2145 B(P= 10.261 d,e=)和TOI-2497 B(P= 10.656 d,e=)。TOI-2145 B和TOI-2497 B都围绕着次巨星(3.8 < log g <4.0)运行,但这些行星尽管受到很高的辐射,却没有显示出膨胀的迹象。没有暴胀的原因可能是行星的质量很大:MJ(TOI-2145 B)和4.82 ± 0.41 MJ(TOI-2497 B)。这六个新发现有助于更大的社区努力使用TESS来创建一个完整的,自洽的巨行星样本,并为未来的详细研究确定参数。
We present the discovery and characterization of six short-period, transiting giant planets from NASA’sTransiting Exoplanet Survey Satellite (TESS)-- TOI-1811 (TIC 376524552), TOI-2025 (TIC 394050135), TOI-2145 (TIC 88992642), TOI-2152 (TIC 395393265), TOI-2154 (TIC 428787891), and TOI-2497 (TIC 97568467). All six planets orbit bright host stars (8.9 <G< 11.8, 7.7 <K< 10.1). Using a combination of time-series photometric and spectroscopic follow-up observations from theTESSFollow-up Observing Program Working Group, we have determined that the planets are Jovian-sized (RP= 0.99--1.45 RJ), have masses ranging from 0.92 to 5.26 MJ, and orbit F, G, and K stars (4766 ≤ Teff≤ 7360 K). We detect a significant orbital eccentricity for the three longest-period systems in our sample: TOI-2025 b (P= 8.872 d, 0.394), TOI-2145 b (P= 10.261 d,e=), and TOI-2497 b (P= 10.656 d,e=). TOI-2145 b and TOI-2497 b both orbit subgiant host stars (3.8 < log  g <4.0), but these planets show no sign of inflation despite very high levels of irradiation. The lack of inflation may be explained by the high mass of the planets;MJ(TOI-2145 b) and 4.82 ± 0.41 MJ(TOI-2497 b). These six new discoveries contribute to the larger community effort to useTESSto create a magnitude-complete, self-consistent sample of giant planets with well-determined parameters for future detailed studies.