题目：Stellar Outbursts and Chondrite Composition

报告人：李敏 （吉林师范大学）

时间：2024年5月30日（周四）10:00

地点：天文大厦三楼中会议室

摘要：The temperatures of observed protoplanetary disks are not sufficiently high to produce the accretion rate needed to form stars, nor are they sufficient to explain the volatile depletion patterns in CM, CO, and CV chondrites and terrestrial planets. We revisit the role that stellar outbursts, caused by high-accretion episodes, play in resolving these two issues. These outbursts provide the necessary mass to form the star during the disk lifetime and provide enough heat to vaporize planet-forming materials. We show that these outbursts can reproduce the observed chondrite abundances at distances near 1 au. These outbursts would also affect the growth of calcium-aluminum rich inclusions and the isotopic compositions of carbonaceous and noncarbonaceous chondrites.

主讲人简介：李敏，吉林师范大学讲师。2014年博士毕业于吉林大学物理学院。2021年回国前，于美国内华达大学拉斯维加斯分校从事博士后研究。主要研究方向是太阳系的形成与演化，行星的形成，陨石、类地行星的成分，太阳系外行星的性质等。已发表包括Nature子刊在内的SCI论文13篇，以第一作者或通讯作者在ApJ、MNRAS、PASP发表论文8篇。