The Hubble Space Telescope PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab
The Hubble Space Telescope PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab
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DOI：
10.3847/1538-3881/ab96cb
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发表时间：
2020-07-01
影响因子：
5.3
通讯作者：
Munoz, Antonio Garcia
中科院分区：
文献类型：
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作者：
Alam, Munazza K.;Lopez-Morales, Mercedes;Munoz, Antonio Garcia
利用安装在哈勃太空望远镜上的空间望远镜成像光谱仪和宽视场相机3，结合斯皮策红外阵列相机测光技术，研究了热木星HAT-P-32Ab的0.3-5 μ m透射光谱。光谱由51个分光光度计箱组成，宽度范围在150到400 A之间，测量的中位数精度为215 ppm。将观测到的透射光谱与一维辐射对流平衡模型的网格进行比较，表明存在云/雾，与先前的凌日观测和二次日食测量一致。为了对这颗行星的大气特性提供更可靠的约束，我们对这颗行星进行了第一次全面的光学到红外检索分析。反演的光谱与边缘温度、厚云层、增强的瑞利散射和类似于10倍太阳的H2O丰度相一致。我们找到log(Z/Z
We present a 0.3-5 mu m transmission spectrum of the hot Jupiter HAT-P-32Ab observed with the Space Telescope Imaging Spectrograph and Wide Field Camera 3 instruments mounted on the Hubble Space Telescope, combined with Spitzer Infrared Array Camera photometry. The spectrum is composed of 51 spectrophotometric bins with widths ranging between 150 and 400 A, measured to a median precision of 215 ppm. Comparisons of the observed transmission spectrum to a grid of 1D radiative-convective equilibrium models indicate the presence of clouds/hazes, consistent with previous transit observations and secondary eclipse measurements. To provide more robust constraints on the planet's atmospheric properties, we perform the first full optical to infrared retrieval analysis for this planet. The retrieved spectrum is consistent with a limb temperature of , a thick cloud deck, enhanced Rayleigh scattering, and similar to 10x solar H2O abundance. We find log(Z/Z