标题： 深入探究T型褐矮星双星系统$ε$印第婴儿座伴星：利用钱德拉和ATCA的观测 显示英文标题

标题： A Deep Look at the T-Type Brown Dwarf Binary $ε$ Indi Bab with Chandra and ATCA

摘要： 我们利用澳大利亚望远镜紧凑阵列在射电波段以及钱德拉X射线天文台在X射线波段，对附近的T型褐矮星双星系统$\epsilon$印第BAB进行了深度观测。尽管积分时间很长，但该双星系统（由T1型和T6型矮星组成）在两种波长范围内均未被探测到。我们在4.8 GHz和8.64 GHz的射电亮度分别达到了$3\sigma$的上限值$1.23 \times 10^{12}$和$1.74 \times 10^{12}$erg/s/Hz；在X射线方面，$0.1-10$keV能段的上限值为$3.16 \times 10^{23}$erg/s。我们从超冷低质量矮星的磁场活动角度讨论了上述结果。 显示英文摘要

摘要： We present deep observations of the nearby T-type brown dwarf binary $\epsilon$ Indi Bab in radio with the Australia Telescope Compact Array and in X-rays with the Chandra X-ray Observatory. Despite long integration times, the binary (composed of T1 and T6 dwarfs) was not detected in either wavelength regime. We reached $3\sigma$ upper limits of $1.23 \times 10^{12}$ and $1.74 \times 10^{12}$ erg/s/Hz for the radio luminosity at 4.8 GHz and 8.64 GHz, respectively; in the X-rays, the upper limit in the $0.1-10$ keV band was $3.16 \times 10^{23}$ erg/s. We discuss the above results in the framework of magnetic activity in ultracool, low-mass dwarfs.