首页 >> 消息静态 >> 讲座预告

Wide Binaries in Gaia DR2

  申报标题:Wide Binaries in Gaia DR2 

  申报人:田海俊 传授 

  申报人简介:湖北省地理学会理事,曾持续三年当选LAMOST Fellow,三峡大年夜学“151”学术带头人,德国马克思普朗克地理所(MPIA)拜访学者。近年研究兴趣重要包含:恒星活动学统计、自行丈量、双星、银河系构造与演变等。掌管国度天然基金三项,参与国度重点基金一项,掌管湖北省重点基金一项(省出色青年基金),发表学术论文30余篇,文章被引120余次。 

  申报摘要:Gaia, a cornerstone mission of the European Space Agency (ESA), delivered its second release (Gaia DR2) on April 25 2018. More than 1.3 billion stars in the Milk Way were measured precise positions, proper motions, parallaxes and colors in Gaia DR2, which provides us vital observational pieces to choose wide binaries within a large volume.  

  It has long been recognized that wide binaries provide a powerful tracer of the Galactic gravitational potential on small scales as well as useful constraints for studies of the star formation process. We recently compiled such a catalog including more than 800 thousands of wide binary candidates from Gaia DR2. With this sample, we carry out several scientific applications: 1) The Separation Distribution of Ultra-Wide Binaries across Galactic Populations; 2) Discovery of an equal-mass “twin” binary population reaching 1000+ AU separations; 3) Precise ages of field stars from dwarf companions.  

  In this talk, I will overview these works in brief. 

  申报时间:2020113(星期一)上午10:30 

  申报地点:仙林园区3-201会议室 

迎接大年夜家参加! 

紫金山地理台学术委员会 

附件下载: