TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars
TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars
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TOI-2084 b 和 TOI-4184 b：M 矮星周围的两颗新的亚海王星
DOI：
10.1051/0004-6361/202346838
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发表时间：
2023
影响因子：
6.5
通讯作者：
Barkaoui K
中科院分区：
文献类型：
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作者：
Barkaoui K
我们提出了两个TESS系外行星的发现和验证轨道附近的M矮星：TOI-2084 B，和TOI-4184 B。我们结合Shane/Kast和Magellan/FIRE的光谱、光谱能量分布分析和恒星演化模型对宿主星进行了表征。此外，我们还使用了Gemini-South/Zorro & -North/Alopeke高分辨率成像，档案科学图像和统计验证包来支持行星解释。我们进行了一个全球性的分析，从TESS和地面设施的多色光度数据，以得出每个系统的恒星和行星的物理参数。我们发现TOI-2084带的TOI-4184裸亚海王星大小的行星，半径分别为Rp = 2.47 ± 0.13 R <$和Rp = 2.43 ± 0.21 R <$。TOI-2084 B每6.08天绕主星星一周，平衡温度Teq = 527 ± 8 K，辐射强度Sp = 12.8 ± 0.8 S Ω。它的主星星星是一颗光谱为M2.0 ± 0.5的矮星，距离为114 pc，有效温度为Teff = 3550 ± 50 K，并有一颗宽的、同向运动的M8伴星，投影距离为1400 Au。TOI-4184 B每4.9天绕一颗M5.0 ± 0.5型矮星星（Kmag= 11.87）公转一周，平衡温度Teq = 412 ± 8 K，辐射强度Sp = 4.8 ± 0.4 S。TOI-4184是一颗贫金属的星星（[Fe/H] = −0.27 ± 0.09 dex），距离69 pc，有效温度Teff = 3225 ± 75 K。这两颗行星都位于半径周期平面中的亚木星沙漠的边缘。它们的宿主恒星的小尺寸和大红外亮度的结合使这些新行星成为JWST未来大气探测的有希望的目标。
We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084 b, and TOI-4184b. We characterized the host stars by combining spectra fromShane/Kast andMagellan/FIRE, spectral energy distribution analysis, and stellar evolutionary models. In addition, we used Gemini-South/Zorro & -North/Alopeke high-resolution imaging, archival science images, and statistical validation packages to support the planetary interpretation. We performed a global analysis of multi-colour photometric data from TESS and ground-based facilities in order to derive the stellar and planetary physical parameters for each system. We find that TOI-2084 band TOI-4184 bare sub-Neptune-sized planets with radii ofRp= 2.47 ± 0.13R⊕andRp= 2.43 ± 0.21R⊕, respectively. TOI-2084 b completes an orbit around its host star every 6.08 days, has an equilibrium temperature ofTeq= 527 ± 8 K and an irradiation ofSp= 12.8 ± 0.8S⊕. Its host star is a dwarf of spectral M2.0 ± 0.5 at a distance of 114 pc with an effective temperature ofTeff= 3550 ± 50 K, and has a wide, co-moving M8 companion at a projected separation of 1400 au. TOI-4184 b orbits around an M5.0 ± 0.5 type dwarf star (Kmag= 11.87) each 4.9 days, and has an equilibrium temperature ofTeq= 412 ± 8 K and an irradiation ofSp= 4.8 ± 0.4S⊕. TOI-4184 is a metal poor star ([Fe/H] = −0.27 ± 0.09 dex) at a distance of 69 pc with an effective temperature ofTeff= 3225 ± 75 K. Both planets are located at the edge of the sub-Jovian desert in the radius-period plane. The combination of the small size and the large infrared brightness of their host stars make these new planets promising targets for future atmospheric exploration with JWST.
天文学 VI 软件和网络基础设施
DOI：
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发表时间：
2021
期刊：
影响因子：
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作者：
J. Guzman;J. Ibsen
通讯作者：
J. Ibsen
DOI：
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发表时间：
2013-06
期刊：
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影响因子：
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作者：
E. Jensen
通讯作者：
E. Jensen
DOI：
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发表时间：
2018-12
期刊：
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影响因子：
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作者：
J. V. M. Cardoso;C. Hedges;M. Gully-Santiago;Nicholas Saunders;A. Cody;T. Barclay;O. Hall;
通讯作者：
J. V. M. Cardoso;C. Hedges;M. Gully-Santiago;Nicholas Saunders;A. Cody;T. Barclay;O. Hall;