Less absorbed solar energy and more internal heat for Jupiter
Less absorbed solar energy and more internal heat for Jupiter
复制标题
木星吸收的太阳能较少，内部热量较多
作者：
Liming Li;Xun Jiang;R. West;P. Gierasch;S. Pérez;A. Sánchez‐Lavega;L. Fletcher;J. Fortney;B. Knowles;C. Porco;K. Baines;P. Fry;A. Mallama;R. Achterberg;A. Simon;C. Nixon;G. Orton;U. Dyudina;S. Ewald;R. Schmude
辐射能量收支和内部热量是巨行星的基本属性，但精确确定这些属性仍然是一个挑战。在这里，我们报告测量木星的辐射能预算和内部热量的基础上卡西尼多仪器观测。我们的研究结果显示，木星的邦德辐射和内部热量分别为0.503 ± 0.012和7.485 ± 0.160 W m−2，明显大于之前最好的估计值0.343 ± 0.032和5.444 ± 0.425 W m −2。新的结果有助于约束和改进目前木星的进化理论和模型。此外，木星的波长依赖性意味着太阳系中其他巨行星的辐射能量预算和内部热量应该重新检查。最后，木星反射太阳光谱辐照度特征数据集为巨系外行星模型提供了观测依据。辐射能量收支和内部热量在行星的演化中起着关键作用。在这里，作者分析了卡西尼号使命的数据，表明木星的辐射能和内部热量预算明显大于以前的估计。
The radiant energy budget and internal heat are fundamental properties of giant planets, but precise determination of these properties remains a challenge. Here, we report measurements of Jupiter’s radiant energy budget and internal heat based on Cassini multi-instrument observations. Our findings reveal that Jupiter’s Bond albedo and internal heat, 0.503 ± 0.012 and 7.485 ± 0.160 W m−2 respectively, are significantly larger than 0.343 ± 0.032 and 5.444 ± 0.425 Wm−2, the previous best estimates. The new results help constrain and improve the current evolutionary theories and models for Jupiter. Furthermore, the significant wavelength dependency of Jupiter’s albedo implies that the radiant energy budgets and internal heat of the other giant planets in our solar system should be re-examined. Finally, the data sets of Jupiter’s characteristics of reflective solar spectral irradiance provide an observational basis for the models of giant exoplanets. Radiant energy budgets and internal heat play a key role in the evolution of planets. Here, the authors analyze data from the Cassini mission to show that Jupiter’s radiant energy and internal heat budgets are significantly larger than previous estimates.