
主讲人:Daniel Koll(北京大学物理学院助理教授)
主持人:丁峰(北京大学物理学院助理教授)
地点:北京大学物理学院思源多功能厅(西301)
时间:2025年12月5日(星期五)15:00—16:00
报告摘要:
Over the last 10 years astronomers have discovered more than 800 rocky exoplanets, that is, planets roughly the size of Earth. The resulting statistics show our galaxy is filled with these worlds. Just as astonishing, until recently we knew little else about them. This picture is now changing. Most stars in our galaxy are much smaller than the Sun. Recent discoveries indicate that many rocky exoplanets around such small stars might have lost their atmospheres. If true, these planets would resemble Mercury and the Moon instead of Earth and Venus, with little chance to support life as we know it. In this talk I will review what is currently known (and not known) about rocky exoplanets, and discuss its implications in the search for life around other stars.
过去10年,天文学家已发现800多颗岩质系外行星,它们大小与地球相仿。统计表明,这类行星在银河系中比比皆是。然而直到最近,我们对其几乎一无所知。如今,情况正在发生变化。银河系大多数恒星比太阳小得多;最新观测显示,围绕这类小恒星的岩质系外行星可能早已失去大气。若属实,它们将更像水星和月球,而非地球或金星,孕育生命的可能性微乎其微。
本次报告将梳理我们对岩质系外行星的已知与未知,并探讨其对搜寻地外生命的启示。
报告人简介:
Daniel Koll is an assistant professor in Peking University's Department of Atmospheric and Oceanic Sciences. He received his undergraduate degree in Physics and Philosophy from Harvard University in 2010, and his PhD in Geophysical Sciences from the University of Chicago in 2016. From 2017 to 2021 he pursued postdoctoral research at MIT, supported by a James McDonnell Foundation fellowship. Daniel Koll's research focused on planetary atmospheres and climates, in particular the climates of rocky exoplanets. Much of his recent work aims at potential Venus- and Mercury-analogs around other stars. By studying these hot worlds we begin to unravel what the average rocky planet in our galaxy is like. The lessons we draw from these worlds will also be key for studying cooler, potentially habitable, exoplanets.
Daniel Koll,北京大学物理学院大气与海洋科学系助理教授。2010年获哈佛大学物理学学士学位,2016年获芝加哥大学地球物理科学博士学位。2017–2021年在MIT从事博士后研究,获James McDonnell基金会资助。Koll的研究聚焦行星大气与气候,尤其关注岩质系外行星的气候特征;近年来主攻“金星型”与“水星型”系外行星。通过研究这些炽热世界,我们得以窥视银河系中普通岩石行星的真容,也为未来探索更冷、可能宜居的系外行星奠定基础。
北京大学格致论坛:
北京大学格致论坛是北京大学物理学院发起的面向青年教学科研人员学术交流活动。“格致”体现两重含义:一是,北京大学物理学科源自京师大学堂格致科;二是,“致知在格物”出自《礼记‧大学》。自2010年4月启动以来,论坛围绕学科领域前沿,面向国家重大需求,针对基础科学问题,开展了十余场学术研讨,分享最新研究成果,促进学科交叉融合,培育新兴方向增长点,展现了北大物理人学术无畏、攀登无限的新风貌。2021年5月,于物理学院成立二十周年之际重启,并增设在线参与通道。
线下参会:物理学院思源多功能厅(西301)
线上参会:扫描下方二维码观看
现场参会报名方式:请于12月4日20:00前提交报名信息。
主办
北京大学物理学院