2286321

Target RA (J2000): 42.435375 and deg Target Dec (J2000): 71.75323 and deg Gaia GMag: 8.033 Programme ID: CH_PR140074 Programme Manager: AKINSANMI PI of observing programme: Benz Title of programme: Axis 3 - Measuring Oblateness and rapid Rotation in Exoplanets (MORE) Abstract: Planets can attain non-spherical shapes as a result of the forces acting upon them. Centrifugal forces due to rapid planetary rotation lead to an equatorial bulge referred to as oblateness. Saturn has the largest oblateness within the Solar system owing to its fast rotation and low density. Therefore measuring the oblateness can provide information about the rotation rate of a planet and its interior structure which can in turn provide insight into the dynamical history of the planet. This program will leverage the precision of CHEOPS to probe for large oblateness indicative of super-rapid rotation rate in selected planets around bright stars. [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：42.435375 度 目标赤纬（J2000坐标系）：71.75323 度 盖亚G星等（Gaia GMag）：8.033 项目编号：CH_PR140074 项目主管：AKINSANMI 观测项目首席研究员（Principal Investigator，PI）：Benz 项目名称：轴3——系外行星扁率与快速自转测量（MORE）
摘要：行星受各类作用力影响可呈现非球形形态。行星快速自转产生的离心力会引发赤道区域隆起，该现象被称为扁率（oblateness）。太阳系中的土星因自转速度快且密度较低，拥有太阳系内最大的行星扁率。因此，测量行星扁率可获取其自转速率与内部结构的相关信息，进而为研究行星的动力学演化历史提供参考。本项目将依托系外行星特征探测卫星（CHEOPS）的高精度观测能力，对亮星周围的候选行星展开探测，以寻找具备显著扁率、即超快速自转特征的系外行星。
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