Search for radio emission from the exoplanets Qatar-1b and WASP-80b near 150 MHz using the giant metrewave radio telescope
Search for radio emission from the exoplanets Qatar-1b and WASP-80b near 150 MHz using the giant metrewave radio telescope
复制标题
使用巨型米波射电望远镜搜索 150 MHz 附近系外行星 Qatar-1b 和 WASP-80b 的射电发射
DOI：
10.1093/mnras/staa3208
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发表时间：
2021
影响因子：
4.8
通讯作者：
Green D
中科院分区：
文献类型：
--
作者：
Green D
我们目前对系外行星卡塔尔-1b和WASP-80 b近150兆赫的巨型米波射电望远镜（GMRT）的无线电观测。这些目标是相对较近的受辐射的巨型系外行星，一个热木星和一个热土星，大小与木星相当，但质量不同，密度较低。这两个目标预计将像木星一样拥有扩展的H/He信封，具有可比或更大的磁矩。在这些有针对性的观测中，卡塔尔-1b和WASP-80 b的3σ极限分别为5.9和5.2 mJy。这些是比在类似频率下的宽场调查中获得的系外行星更深的限制。我们还提出了档案甚大阵列（VLA）的观测以前报告的无线电源接近61 Vir（其中有三个系外行星）。VLA的观测解析了这个来源，我们将其确定为河外射电源，即与61 Vir的偶然关联。此外，我们将最近的系外行星目录与TIFR GMRT巡天ADR 1无线电目录进行交叉匹配，但没有发现任何令人信服的关联。
We present radio observations made towards the exoplanets Qatar-1b and WASP-80b near 150 MHz with the Giant Meterwave Radio Telescope (GMRT). These targets are relatively nearby irradiated giant exoplanets, a hot Jupiter and a hot Saturn, with sizes comparable to Jupiter but different masses and lower densities. Both the targets are expected to host extended H/He envelopes like Jupiter, with comparable or larger magnetic moments. No radio emission was detected from these exoplanets, with 3σ limits of 5.9 and 5.2 mJy for Qatar-1b and WASP-80b, respectively, from these targeted observations. These are considerably deeper limits than those available for exoplanets from wide-field surveys at similar frequencies. We also present archival Very Large Array (VLA) observations of a previously reported radio source close to 61 Vir (which has three exoplanets). The VLA observations resolve the source, which we identify as an extragalactic radio source, i.e. a chance association with 61 Vir. Additionally, we cross-match a recent exoplanet catalogue with the TIFR GMRT Sky Survey ADR1 radio catalogue, but do not find any convincing associations.