天文学系
站内检索
High Energy Neutrino Astronomy
THE QUEST FOR DUSTY STARFORMING GALAXIES
Calibrating Ia Supernova Absolute Luminosities using the Distance-Duality Relation
Hunting for Cosmic Baryons
WISE-selected, hyperluminous dust-obscured galaxies: IR SED decomposition and host galaxy morphology
爱因斯坦探针:时域天文发现的机遇
Loop quantum cosmology and alternatives to inflation
A Golden Age for Astrometry - Uncovering the Secrets of the Milky Way
Recent Work on Galactic Dynamics
Superconducting Detectors for Millimeter/Submillimeter Astronomy
More系所链接
    您现在的位置:首页>学术活动>学术报告

    Direct collision of white dwarfs as a major channel for type Ia supernovae explosions

     

    报告人:东苏勃 教授(KIAA)

     

    时间:2016年4月5日下午4:00

    地点:东区理化大楼18层天文台报告厅

     

    报告摘要:The field of type Ia supernova (SN Ia) explosion physics is in a crisis. Decades of theoretical researches fail to demonstrate that successful explosions can be convincingly achieved from the popular single degenerate and double degenerate merger models. A growing number of observational evidences contradict these two popular scenarios to explain the SN Ia population. We argue that the direct white dwarf-white dwarf collisions in the field multiple stellar systems is the most promising mechanism to explain the SN Ia population. Not only do collisions explain several robust features across the entire SN Ia population, but also their predictions of the bi-modal Ni56 distributions in the ejecta are recently discovered observationally. I will discuss key observational tests on the SNe Ia models enabled by the All Sky Automatic Survey for SuperNovae (ASAS-SN)-- the most successful bright supernova survey at present. I will also discuss the most luminous supernova yet discovered -- ASASSN-15lh.


     
    欲浏览最佳效果 建议使用IE6.0版本以上的浏览器 1024x768以上分辨率
    版权所有:中国科学技术大学物理学院天文学系