论文标题
WASP-62B的清晰大气的证据：JWST连续观看区中唯一已知的过境气体巨头
Evidence of a Clear Atmosphere for WASP-62b: the Only Known Transiting Gas Giant in the JWST Continuous Viewing Zone
论文作者
论文摘要
在传播光谱探测的压力下，具有无云的无覆盖气氛的系外行星代表了详细的大气表征和精确的化学丰度约束的宝贵机会。我们提出了第一个使用Hubble/stis和Spitzer/Irac测量的热木星WASP-62B的红外（0.3-5微米）传输光谱。该光谱的特征是在0.59微米处对Na I吸收的5.1- sigma检测，其中首次从空间观察到Na D线的压力缓慢的翅膀。 0.4微米处的光谱特征暂时归因于SIH，其置信度为2.1 sig。我们的检索分析与无云的气氛一致，而没有恒星异质性的明显污染。我们模拟了詹姆斯·韦伯（James Webb）空间望远镜（JWST）观测值，以评估WASP-62B的大气表征潜力。我们证明JWST可以在其早期发行科学（ERS）计划的范围内最终检测到NA，H2O，FEH和SIH。 WASP-62B是JWST连续观看区域中目前唯一的过境巨型星球，可以证明是詹姆斯·韦伯时代的详细大气特征的基准巨型系外行星。
Exoplanets with cloud-free, haze-free atmospheres at the pressures probed by transmission spectroscopy represent a valuable opportunity for detailed atmospheric characterization and precise chemical abundance constraints. We present the first optical to infrared (0.3-5 microns) transmission spectrum of the hot Jupiter WASP-62b, measured with Hubble/STIS and Spitzer/IRAC. The spectrum is characterized by a 5.1-sigma detection of Na I absorption at 0.59 microns, in which the pressure-broadened wings of the Na D-lines are observed from space for the first time. A spectral feature at 0.4 microns is tentatively attributed to SiH at 2.1-sigma confidence. Our retrieval analyses are consistent with a cloud-free atmosphere without significant contamination from stellar heterogeneities. We simulate James Webb Space Telescope (JWST) observations, for a combination of instrument modes, to assess the atmospheric characterization potential of WASP-62b. We demonstrate that JWST can conclusively detect Na, H2O, FeH, and SiH within the scope of its Early Release Science (ERS) program. As the only transiting giant planet currently known in the JWST Continuous Viewing Zone, WASP-62b could prove a benchmark giant exoplanet for detailed atmospheric characterization in the James Webb era.
