标题： 在棕矮星中寻找天气 显示英文标题

标题： Searching for Weather in Brown Dwarfs

摘要： 我们使用了一种创新的可调滤波技术，以在两个附近棕矮星的大气中搜索气象过程的变异性特征。 我们在观测时间跨度约为半个自转周期（3小时）的L型棕矮星DENIS-PJ1228-1547中未发现变异性证据，并在多个观测时间跨度约为自转周期三分之一（1.5小时）的M型棕矮星LP 944-20中发现了变异性证据。 显示英文摘要

摘要： We have used an innovative tuneable filter technique to carry out a search for the variability signatures of meterological processes in the atmospheres of two nearby brown dwarfs. We find no evidence for variability in the L-type brown dwarf DENIS-PJ1228-1547 in an observations spanning approximately half a rotation period (3 hours), and evidence for variability in the M-type brown dwarf LP 944-20 in multiple observations spanning approximately one third of a rotation period (1.5 hours).