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Studies on the pulsar and circumstellar ring of the supernova 1987A

超新星1987A脉冲星和星周环的研究

基本信息

批准号：
04640265
负责人：
NOMOTO Ken'ichi
金额：
$ 1.54万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640265/
关键词：
Supernova Neutron Star Stellar Evolution gamma-ray X-ray Pulsar Nucleosynthesis Infrared

项目摘要

The aim of this research is to study two new problems raised by SN1987A.These are : (1) the properties of a newly born pulsar (rotation and magnetic field) and its detectability, and (2) the origin and properties of the ring-like circumstellar matter discovered by the Hubble Space Telescope and the prediction of the collision between the supernova ejecta and the ring.(1). The light curves of 50-140keV hard X-rays observed with GRO (Compton Gamma-Ray Observatory) and the optical light curve, which has shown interesting behavior, have provided new materials for the radioactive elements and pulsar activity. I obtained the ^<57>Co/^<56>Co ratio and constraint on the pulsar luminosity. I also estimated the detectability of pulsar activity with ASCA.(2). I also carried out the 2D numerical simulation of the collision between the supernova ejecta and the circumstellar ring.Supernova 1993J which appeared in the neaby galaxy M81 has also provided new problems as SN 1987A.(1). For SN 1993J,I have also predicted that a new born pulsar can be observed with ASCA depending on its luminosity.(2) I also carried out the simulation of the collision between the supernova ejecta and circumstellar matter and calculated X-ray flux expected from hot plasmas formed in such a collision. The results have been compared with the observations by ASCA,ROSAT,and OSSE,from which I inferred the circumstellar matter densities and explosion energy.

本文研究了SN 1987 A提出的两个新问题：（1）新诞生脉冲星的性质（自转和磁场）及其可探测性;（2）哈勃空间望远镜发现的星周环状物质的起源和性质，以及超新星喷出物与星环碰撞的预测。（一）.康普顿γ射线天文台（GRO）观测到的50- 140 keV硬X射线的光变曲线和光学光变曲线表现出有趣的行为，为研究放射性元素和脉冲星活动提供了新的材料。我得到了^<57>Co/^<56>Co比值和对脉冲星光度的约束。我还用ASCA估计了脉冲星活动的可探测性。（二）、本文还对超新星喷出物与星周环的碰撞进行了二维数值模拟，近星系M81中出现的超新星1993 J也像SN 1987 A一样提出了新的问题。（一）.对于SN 1993 J，我还预测了一颗新诞生的脉冲星可以用ASCA观测到，这取决于它的光度。(2)我还进行了超新星喷出物和星周物质之间碰撞的模拟，并计算了在这种碰撞中形成的热等离子体的X射线通量。并与ASCA、ROSAT和OSSE的观测结果进行了比较，由此推断了星周物质密度和爆炸能量。