论文标题
从系外行星中搜索无线电排放：GMRT观察二进制系统HD〜41004
In search of radio emission from exoplanets: GMRT observations of the binary system HD~41004
论文作者
论文摘要
本文报告了巨大的Metrewave射电望远镜（GMRT）对二元系统HD 41004的观察结果，这些观测是有史以来在150〜MHz和400 MHz中获得的最深图像之一，在搜索来自系外行星的无线电发射时。 HD 41004二元系统由K1 V初级恒星和M2 V次级组成；这两颗星星都是庞大的星球或棕色矮人的主机。类似于我们的太阳系中的行星，该行星由于其强磁场而在无线电波长上发射，HD 41004二进制系统中的一个或两个矮人也被认为是无线电发射的来源。各种模型预测HD〜41004BB的预期通量密度为150 MHz。 150 MHz的观测值几乎涵盖了HD 41004BB的整个轨道周期，约为$ 20 \％$ $ $的轨道覆盖为400 MHz。我们没有检测到无线电发射，在150 MHz时设置3 $σ$限制为1.8 mjy，在400 MHz时设置为0.12 MJY。我们还讨论了从HD 41004二元系统中未检测到无线电排放的一些可能原因。
This paper reports Giant Metrewave Radio Telescope (GMRT) observations of the binary system HD 41004 that are among the deepest images ever obtained at 150~MHz and 400 MHz in the search for radio emission from exoplanets. The HD 41004 binary system consists of a K1 V primary star and an M2 V secondary; both stars are host to a massive planet or brown dwarf. Analogous to planets in our solar system that emit at radio wavelengths due to their strong magnetic fields, one or both of the planet or brown dwarf in the HD 41004 binary system are also thought to be sources of radio emission. Various models predict HD~41004Bb to have one of the largest expected flux densities at 150 MHz. The observations at 150 MHz cover almost the entire orbital period of HD 41004Bb, and about $20\%$ of the orbit is covered at 400 MHz. We do not detect radio emission, setting 3$σ$ limits of 1.8 mJy at 150 MHz and 0.12 mJy at 400 MHz. We also discuss some of the possible reasons why no radio emission was detected from the HD 41004 binary system.
