Title: Transits of extrasolar moons around luminous giant planets Show Chinese title

Title: 太阳系外卫星凌日现象研究

Abstract: Beyond Earth-like planets, moons can be habitable, too. No exomoons have been securely detected, but they could be extremely abundant. Young Jovian planets can be as hot as late M stars, with effective temperatures of up to 2000 K. Transits of their moons might be detectable in their infrared photometric light curves if the planets are sufficiently separated ($\gtrsim10$ AU) from the stars to be directly imaged. The moons will be heated by radiation from their young planets and potentially by tidal friction. Although stellar illumination will be weak beyond 5 AU, these alternative energy sources could liquify surface water on exomoons for hundreds of Myr. A Mars-mass H$_2$O-rich moon around $\beta$ Pic b would have a transit depth of $1.5\times10^{-3}$, in reach of near-future technology. Show Chinese abstract

Abstract: 除了类地行星之外，卫星也可能宜居。 尚未发现确凿的太阳系外卫星，但它们可能极其丰富。 年轻的木星型行星的有效温度可以高达2000K，与晚期M型恒星相当。 如果这些行星与恒星之间的距离足够大（$\gtrsim10$AU）以便直接成像，那么它们的卫星可能会在红外光曲线中被探测到。 卫星将被年轻行星的辐射加热，并且可能受到潮汐摩擦的影响。 尽管在超过5 AU的距离上恒星的光照会很弱，但这些替代能源可以在数亿年内液化太阳系外卫星上的表面水。 一颗质量相当于火星、富含H$_2$O的卫星围绕$\beta$Pic b运行时，其凌星深度将达到$1.5\times10^{-3}$，这在近未来的观测技术范围内。