标题： 小行星对巨exo行星撞击的可探测性 显示英文标题

标题： Detectability of Planetesimal Impacts on Giant Exoplanets

摘要： 利用1994年舒梅克-列维9号彗星撞击木星事件作为替代物，可以测量微小行星对成像系外行星的影响可探测性。 通过整合整个行星通量（有和没有撞击点），揭示了从2到4微米波长处撞击的影响。 木星在近红外的反射光谱主要由其甲烷吸收特性主导，其中包括一个深达2.3微米的带状结构。 撞击后，本应被木星大气中大量甲烷吸收的阳光，转而被撞击产生的彗星物质反射。 因此，在通常情况下行星反射率较低的2.3微米波长处，木星显著变亮，并且至少在一个星期内保持更亮的状态。 显示英文摘要

摘要： The detectability of planetesimal impacts on imaged exoplanets can be measured using Jupiter during the 1994 comet Shoemaker-Levy 9 events as a proxy. By integrating the whole planet flux with and without impact spots, the effect of the impacts at wavelengths from 2 - 4 microns is revealed. Jupiter's reflected light spectrum in the near-infrared is dominated by its methane opacity including a deep band at 2.3 microns. After the impact, sunlight that would have normally been absorbed by the large amount of methane in Jupiter's atmosphere was instead reflected by the cometary material from the impacts. As a result, at 2.3 microns, where the planet would normally have low reflectivity, it brightened substantially and stayed brighter for at least a month.