We present the latest result of the TAPAS project that is devoted to intense monitoring of planetary candidates that are identified within the PennState-Toru\'n planet search. We aim to detect planetary systems around evolved stars to be able to build sound statistics on the frequency and intrinsic nature of these systems, and to deliver in-depth studies of selected planetary systems with evidence of star-planet interaction processes. The paper is based on precise radial velocity measurements: 13 epochs collected over 1920 days with the Hobby-Eberly Telescope and its High-Resolution Spectrograph, and 22 epochs of ultra-precise HARPS-N data collected over 961 days. We present a warm-Jupiter ($T_{eq}=1350 K$, $m_{2} sin i=5.4\pm$0.4$M_{J}$) companion with an orbital period of 26.468 days in a circular ($e=0.036$) orbit around a giant evolved ($\log g=3.11\pm0.09$, $R=6.26\pm0.86R_{\odot}$) star with $M_{\star}=1.87\pm0.17M_{\odot}$. This is the most massive and oldest star found to be hosting a close-in giant planet. Its proximity to its host ($a=0.21au$) means that the planet has a $13.9\pm2.0\%$ probability of transits; this calls for photometric follow-up study. This massive warm Jupiter with a near circular orbit around an evolved massive star can help set constraints on general migration mechanisms for warm Jupiters and, given its high equilibrium temperature, can help test energy deposition models in hot Jupiters.
翻译:我们展示了TAPAS项目的最新结果。 TAPAS项目致力于对行星候选者进行密集监测,这是在Penn State-Toru\'n的行星搜索中发现的。我们的目标是探测进化恒星周围的行星系统,以便能够建立关于这些系统频率和内在性质的可靠统计数据,并对选定的行星系统进行深入的研究,并有恒星-行星相互作用过程的证据。本文基于精确的辐射速度测量:1920天中与Hobby-Eberly望远镜及其高分辨率分光谱仪一起收集的13个小行星,以及超过961天的超精确度的HARPS-N数据。我们展示了一个温暖的行星系统(T ⁇ qeq ⁇ /1350KK$,$m2}sinym=5.4p$0.4M ⁇ J} 。本文基于巨型后续跟踪(e=0.036美元)轨道上采集的13g=3.00美元, 0.9美元超精确度恒星轨道上采集的恒星轨道温度值值值值值 0.626=0.00M 恒星质变现星的恒星的恒星变值。