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了两个非常短周期系统的发现，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。行星和褐矮星与附近主序星的相互作用对于理解sdB星的起源是非常重要的，sdB星是红巨星的剥离核心。近距离双星的相互作用被用来解释形成这些紧凑的演化恒星所必需的包层的大量损失。是否以及在什么条件下，亚恒星的同伴能够完成这项工作还在争论之中。在这里，我们提出后续观测来获得候选短周期sdB双星的轨道参数，以发现更多的亚星伴星。

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.