TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
复制标题
TOI-908:海王星沙漠边缘的一颗行星,正在穿越 G 型恒星
DOI:
10.1093/mnras/stad1840
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发表时间:
2023
影响因子:
4.8
通讯作者:
Hawthorn F
中科院分区:
文献类型:
--
作者:
Hawthorn F
We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data fromTESSsectors 1, 12, 13, 27, 28, and 39. TOI-908 is aT= 10.7 mag G-dwarf (Teff= 5626 ± 61 K) solar-like star with a mass of 0.950 ± 0.010 M⊙and a radius of 1.028 ± 0.030 R⊙. The planet, TOI-908 b, is a 3.18 ± 0.16 R⊕planet in a 3.18 d orbit. Radial velocity measurements fromHARPSreveal TOI-908 b has a mass of approximately 16.1 ± 4.1 M⊕, resulting in a bulk planetary density ofg cm−3. TOI-908 b lies in a sparsely populated region of parameter space known as the Neptune desert. The planet likely began its life as a sub-Saturn planet before it experienced significant photoevaporation due to X-rays and extreme ultraviolet radiation from its host star, and is likely to continue evaporating, losing a significant fraction of its residual envelope mass.