论文标题
TOI-954 B和K2-329 B：短期土星质量行星，测试辐射是否导致通货膨胀
TOI-954 b and K2-329 b: Short-Period Saturn-Mass Planets that Test whether Irradiation Leads to Inflation
论文作者
论文摘要
我们报告发现两个短期土星质量行星，一个在Tess 4和5中观察到的G子级Toi-954（TIC 44792534，$ v = 10.343 $，$ v = 9.78 $），一个在Tess sectors 4和5中观察到，另一个在Transe op k2-329 $ k2-329（$ k2-329 $ k2-329）（$ V = 1.12.70）在K2运动12和19中观察到。我们确认并表征了这两个行星，这些行星具有各种基于地面的档案和后续观测值，包括光度法，侦察光谱，精确的径向速度和高分辨率成像。结合所有可用数据，我们发现TOI-954 B的半径为$ 0.852 _ { - 0.062}^{+0.053} \，r _ {\ Mathrm {J}} $，质量为$ 0.174 _ { - 0.174 _ {-0.017}^^+0.018}^{并且在3.68天的轨道中，而K2-329 b的半径为0.774 _ { - 0.024}^{+0.026} \，r _ {\ MATHRM {J}} $，质量为$ 0.260 _ { - 0.260 _ { - 0.022}^0.022}^0.022}^0.0020} m _ {\ mathrm {j}} $，在12.46天轨道中。由于TOI-954 B的辐射量是K2-329 B的30倍，但大小相同，这两个行星提供了一个机会，可以测试辐射是否导致土星质量行星的充气，并为将来的比较研究促进探索一生中相反的土星质量行星的未来比较研究。
We report the discovery of two short-period Saturn-mass planets, one transiting the G subgiant TOI-954 (TIC 44792534, $ V = 10.343 $, $ T = 9.78 $) observed in TESS sectors 4 and 5, and one transiting the G dwarf K2-329 (EPIC 246193072, $ V = 12.70 $, $ K = 10.67 $) observed in K2 campaigns 12 and 19. We confirm and characterize these two planets with a variety of ground-based archival and follow-up observations, including photometry, reconnaissance spectroscopy, precise radial velocity, and high-resolution imaging. Combining all available data, we find that TOI-954 b has a radius of $0.852_{-0.062}^{+0.053} \, R_{\mathrm{J}}$ and a mass of $0.174_{-0.017}^{+0.018} \, M_{\mathrm{J}}$ and is in a 3.68 day orbit, while K2-329 b has a radius of $0.774_{-0.024}^{+0.026} \, R_{\mathrm{J}}$ and a mass of $0.260_{-0.022}^{+0.020} \, M_{\mathrm{J}}$ and is in a 12.46 day orbit. As TOI-954 b is 30 times more irradiated than K2-329 b but more or less the same size, these two planets provide an opportunity to test whether irradiation leads to inflation of Saturn-mass planets and contribute to future comparative studies that explore Saturn-mass planets at contrasting points in their lifetimes.
