Hot subdwarf stars with substellar companions from the MUCHFUSS project

我们对SDSS(MUCHFUSS)热亚矮星的径向速度测量导致发现了两个非常短的周期系统，它们最有可能是亚恒星伴星。在调查过程中，我们发现了更有前途的候选人。行星和棕矮星与邻近的主序恒星的相互作用对于理解SDB星的起源可能非常重要，SDB星是红巨星的剥离核心。紧密的双星相互作用被用来解释形成这些致密的、进化的恒星所必需的包络的巨大损失。是否以及在什么条件下，亚恒星同伴才能完成这项工作，目前尚无定论。在这里，我们建议后续观测，以获得我们的候选短周期SDB双星的轨道参数，以发现更多的亚恒星伴星。

Our radial velocity survey of hot subdwarf stars from SDSS (MUCHFUSS) ledto the discovery of two very short period systems with most likely substellarcompanions. In the course of that survey we found more promising candidates. Theinteraction of planets and brown dwarfs with close-by main sequence stars may behighly important to understand the yet unclear origin of sdB stars, which are thestripped cores of red giants. Close binary interaction has been invoked to explain themassive loss of envelope necessary to form these compact, evolved stars. Whetherand under what conditions substellar companions are able to do the job is underdebate. Here we propose follow-up observations to obtain orbital parameters of ourcandidate short-period sdB binaries to discover more substellar companions.