南极太阳系外行星搜寻与Kepler行星TTV研究  

Exoplanet Survey at Antarctic and the TTV Research of Kepler Exoplanet Candidates

作　　者：张辉[1] 周济林[1] 付建宁[2] 吴江华[2] 周礼勇[1] Zhang Hui;Zhou Jilin;Fu Jianning;Wu Jianghua;Zhou Liyong(Nanjing University;Beijing Normal University)

机构地区：[1]南京大学 [2]北京师范大学

出　　处：《科技资讯》2016年第34期251-251,共1页Science & Technology Information

摘　　要：南极AST3望远镜研究将会获得南天极附近天区恒星长时序高精度的测光数据。从这些数据里,我们可以通过探测行星掩星信号来搜寻太阳系外行星,也可以根据多次掩星之间的间隔变化(TTV)来确认多行星系统。2013年度,我们处理了CSTAR2008年的i波段数据,剔除了数据类几种类型的误差,将精度提高到1%以下,从而能够有效发现木星尺寸的系外行星。经过搜寻,我们在南天极附近天区找到了10颗系外行星候选体。同时,我们使用时序更长的kepler测光数据,对kepler多行星系统内的行星候选体进行了分析,分两次证认了其中16个系统的32颗行星。对kepler行星TTV研究的经验,将被应用于南极AST3项目后续获得的时序测光数据上。The AST3project will monitor a large area around the south celestial pole and obtain long term photometric dataof those stars within that area.From these data,we could detect the transiting signals of exoplanets.Studying the transittime variations also allowd us to confirm those multiple-planet system.First,we reprocessed the2008data of CSTAR byeliminating some systematic errors.The photometric accuracy was improved to below1%which allows us to detect Jupiter sizeexoplanet effectively.From the improved data,we found10exoplanet candidates.Second,to study the TTV effects,weadopted the light-curves from the Kepler project.By remodeling the interaction between two planets trapped in mean motionresonances(MMRs),we calculated the correlations between the interacting planets in each system and confirmed that they arereal exoplanets.32new exoplanets were confirmed by us during2013.These experience will be adopted on the data fromfurther AST3observations.

关 键 词：南极 太阳系外行星 掩星 掩星时刻变化 CSTAR AST3 KEPLER 

分 类 号：P185[天文地球—天文学]