标题： 低质量恒星宜居行星上的光合作用 显示英文标题

标题： Photosynthesis on habitable planets around low-mass stars

摘要： 我们表明，围绕M矮星的行星如果具有$M_\star \lesssim 0.2 M_\odot$，可能无法接收到足够的光子在光合作用有效范围$400$-$750$纳米内，以维持类似地球的生物圈。由于较低的生物生产力，宜居行星的大气层中很可能不会积累到可检测水平的生物分子氧气，这与Lehmer等人（2018）之前的工作一致。我们还估算了维持类似地球生产力的生物圈并允许大气氧积累所需的最小耀斑率，发现绝大多数M矮星不太可能超过这一阈值。 显示英文摘要

摘要： We show that planets around M-dwarfs with $M_\star \lesssim 0.2 M_\odot$ may not receive enough photons in the photosynthetically active range of $400$-$750$ nm to sustain Earth-like biospheres. As a result of the lower biological productivity, it is likely that biotic molecular oxygen would not build up to detectable levels in the atmospheres of habitable planets orbiting low-mass stars, consistent with prior work by Lehmer et al. (2018). We also estimate the minimum flaring rate for sustaining biospheres with Earth-like productivity and permitting the build-up of atmospheric oxygen, and find that the overwhelming majority of M-dwarfs are unlikely to exceed this threshold.