摘要
用激光等离子体相互作用对天体物理过程进行模拟研究已成为当前世界物理和天文学家深感兴趣的重要前沿领域 .文章比较了强激光作用下产生的等离子体与天体物理条件下的等离子体之间在内部物理过程的相似性 ,论述了由前者模拟后者的物理依据 ,即相似性原则和定标规律 .在此基础上 ,回顾和评述了当前已经在高离化态光谱学、类天体等离子体状态方程和辐射不透明度以及流体动力学不稳定性等方面开展的强激光天体物理学的研究 ,这些研究对于理解超新星、白矮星、中子星以及巨行星、褐矮星等领域的天体物理过程起到了极大的作用 。
The use of a state\|of\|the\|art laser facility makes it possible to produce materials in the laboratory similar to those in astrophysical systems. The introduction of the astrophysics\|related ideas in laser\|plasma interaction experiments is vital to the understanding of astrophysical phenomena. We compare the plasmas produced by intense lasers and those produced under astrophysical conditions, pointing out their inherent similarity, which provides the physical grounds for modeling astrophysical plasma by laser plasmas, i.e., the similarity principle and scaling laws. Then we review the most recent research in intense laser astrophysics, including highly ionized ion spectroscopy, the equations of state and radiation opacity of astrophysical plasmas, and hydrodynamic instabilities. These studies have greatly improved our understanding of the astrophysical processes in supernovae, white dwarfs, neutron stars, giant planets and brown dwarfs, thus allowing the creation of experimental test beds where observations and models can be quantitatively compared with laboratory data.
出处
《物理》
CAS
北大核心
2001年第4期210-216,共7页
Physics
