论文标题
高度怪异的温暖木星绕TIC 237913194
A Highly Eccentric Warm Jupiter Orbiting TIC 237913194
论文作者
论文摘要
温暖的木星的轨道参数是其编队历史记录的记录，在近乎近乎中间轨道上为巨型行星的形成场景提供了限制。在这里，我们报告了TIC 237913194B的发现，在苔丝，地面光度法（CHAT，LCOGT）和FEROS径向速度时间序列的全帧图像中检测到。我们将其质量限制为$ m_ \ mathrm {p} = 1.942 _ { - 0.091}^{+0.091} \，{\ rm m_ {j}} $，其半径为$ r_ \ r_ \ mathrm {p} = 1.117 _ { - 0.047} { - 0.047}}^{ - 0.047}^{^{{{{{{{{{{{{\ rm r_ {j}}。 r_j} $，暗示着与海王星类似的散装密度。它绕G-Type星（$ {\ rm m} _ {\ star} = 1.026 _ { - 0.055}^{+0.057} \，{\ rm m} _ {\ rm m} _ {\ odot} $，$ v = 12.1 $ MAG）温暖的巨人（$ e \约0.58 $）。这种极端的动态状态表明了过去与其他未发现的大型伴侣的相互作用。潮汐进化分析表明，潮汐耗散时间尺度很大，这表明该行星不是木星在其高含量迁移期间被捕获的热木星的祖细胞。 TIC 237913194B进一步代表了研究能量沉积和重新分布的有吸引力的机会。
The orbital parameters of warm Jupiters serve as a record of their formation history, providing constraints on formation scenarios for giant planets on close and intermediate orbits. Here, we report the discovery of TIC 237913194b, detected in full frame images from Sectors 1 and 2 of TESS, ground-based photometry (CHAT, LCOGT), and FEROS radial velocity time series. We constrain its mass to $M_\mathrm{P} = 1.942_{-0.091}^{+0.091}\,{\rm M_{J}} $, and its radius to $R_\mathrm{P} = 1.117_{-0.047}^{+0.054}\,{\rm R_J}$, implying a bulk density similar to Neptune's. It orbits a G-type star (${\rm M}_{\star} = 1.026_{-0.055}^{+0.057}\,{\rm M}_{\odot}$, $V = 12.1$ mag) with a period of $15.17\,$d on one of the most eccentric orbits of all known warm giants ($e \approx 0.58$). This extreme dynamical state points to a past interaction with an additional, undetected massive companion. A tidal evolution analysis showed a large tidal dissipation timescale, suggesting that the planet is not a progenitor for a hot Jupiter caught during its high-eccentricity migration. TIC 237913194b further represents an attractive opportunity to study the energy deposition and redistribution in the atmosphere of a warm Jupiter with high eccentricity.
