Comparative planetary atmospheres: Models of TrES-1 and HD 209458B
Comparative planetary atmospheres: Models of TrES-1 and HD 209458B
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DOI：
10.1086/431952
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发表时间：
2005-07-01
影响因子：
4.9
通讯作者：
Freedman, R
中科院分区：
文献类型：
--
作者：
Fortney, JJ;Marley, MS;Freedman, R
我们为凌日行星TRES-1和HD 209458b提出了新的自洽大气模型。最近用斯皮策太空望远镜观测到了这些行星，TRES-1的中心波段为4.5微米和8.0微米，HD 209458B的中心波段为24微米。我们发现标准太阳金属丰度模型符合HD209458b的观测结果。对于T-Eff与300K冷却器相似的TRES-1，我们发现，金属丰度高于太阳丰度3-5倍的模型可以匹配4.5微米的1西格玛误差条和8.0微米的2西格玛误差条。包含进入平流层的能量沉积的太阳丰度模型在两个波段都给出落入2西格玛误差条的通量。最适合这两颗行星的模型假设，吸收的恒星流量的重新辐射发生在整个行星上。对于这两个行星的所有模型，我们预测了其他斯皮策带通中的行星与恒星的流量比。
We present new self-consistent atmosphere models for the transiting planets TrES-1 and HD 209458b. The planets were recently observed with the Spitzer Space Telescope in bands centered on 4.5 and 8.0 mu m, for TrES-1, and 24 mu m, for HD 209458b. We find that standard solar-metallicity models fit the observations for HD 209458b. For TrES-1, which has a T-eff similar to 300 K cooler, we find that models with a metallicity 3-5 times enhanced over solar abundances can match the 1 sigma error bar at 4.5 mu m and 2 sigma at 8.0 mu m. Models with solar abundances that include energy deposition into the stratosphere give fluxes that fall within the 2 sigma error bars in both bands. The best-fit models for both planets assume that reradiation of absorbed stellar flux occurs over the entire planet. For all models of both planets, we predict planet-to-star flux ratios in other Spitzer bandpasses.