寻找系外行星的射电辐射：双星系统HD ~41004的GMRT观测
In search of radio emission from exoplanets: GMRT observations of the binary system HD~41004
摘要：
本文报道了巨米波射电望远镜（Giant Metrewave Radio Telescope，GMRT）对双星系统HD 41004的观测结果，这是迄今为止在150 MHz和400 MHz波段上获得的最深的图像之一。HD 41004双星系统由一颗K1 V主星和一颗M2 V副星组成;两颗恒星都有一颗大质量行星或褐矮星。类似于我们太阳系中的行星，由于其强大的磁场而发射无线电波长，HD 41004双星系统中的一颗或两颗行星或棕矮星也被认为是无线电发射源。各种模型预测HD~ 41004 Bb在150 MHz时具有最大的预期通量密度之一。在150 MHz的观测几乎覆盖了HD 41004 Bb的整个轨道周期，而在400 MHz的观测则覆盖了轨道的大约$20\%$。我们没有检测到无线电发射，设置3个$σ$限值，150 MHz时为1.8 mJy，400 MHz时为0.12 mJy。我们还讨论了一些可能的原因，为什么没有无线电发射检测到的HD 41004双星系统。
英文摘要：
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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
