论文标题
使用巨大的Metrewave射电望远镜从系外行星卡塔尔1B和WASP-80B搜索150 MHz的无线电发射
Search for radio emission from the exoplanets Qatar-1b and WASP-80b near 150 MHz using the Giant Metrewave Radio Telescope
论文作者
论文摘要
我们介绍了针对卡塔尔1B系外行星和WASP-80B的无线电观察结果，该观察结果在150〜MHz附近，并带有巨型MeterWave射电望远镜。这些靶标相对附近受辐照的巨型外球星，热木星和热土星，尺寸与木星相当，但质量不同，密度较低。预计这两个靶标都将托管诸如木星（如木星）的延长h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h/h的相似或更大的磁矩。从这些系外行星中未检测到无线电发射，从这些靶向观测值中，卡塔尔-1B和WASP-80B的3sigma极限分别为5.9和5.2 mjy。这些限制比以类似频率的大型野外调查可用于外部球星的限制要深得多。我们还提出了档案VLA的观察结果，对接近VIR 61的先前报道的无线电源（具有三个系外行星）。 VLA的观察结果解决了源，我们将其识别为外乳外无线电来源，即与Vir 61的偶然关联。此外，我们与TIFR GMRT GMRT Sky Sumper Adr1无线电目录进行了交叉匹配，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. 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 3sigma 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 VLA observations of a previously reported radio source close to Vir 61 (which has three exoplanets). The VLA observations resolve the source, which we identify as an extragalactic radio source, i.e. a chance association with Vir 61. Additionally, we cross-match a recent exoplanet catalogue with the TIFR GMRT Sky Survey ADR1 radio catalogue, but do not find any convincing associations.
