摘要：We present the discovery of three small planets transiting K2-136 (LP 358 348, EPIC 247589423), a late K dwarf in the Hyades. The planets have orbital periods of 7.9757±0.0011, 17.30681 0.00036 0.00034 - + , and 25.5715 0.0040 days 0.0038 - + , and radii of 1.05±0.16, 3.14±0.36, and 1.55 0.21 R 0.24 - + Å, respectively. With an age of 600–800 Myr, these planets are some of the smallest and youngest transiting planets known. Due to the relatively bright (J=9.1) host star, the planets are compelling targets for future characterization via radial velocity mass measurements and transmission spectroscopy. As the first known star with multiple transiting planets in a cluster, the system should be helpful for testing theories of planet formation and migration.
关键词：planetary systems;planets and satellites: detection;stars: individual (LP 358-348);techniques: photometric;techniques: spectroscopic
