Intense Flux Tubes on the Sun, U.S.-India Cooperative Research

技术说明：在一个联合研究项目中，剑桥大学哈佛-史密森天体物理中心的Wolfgang Kalkofen博士和班加罗尔印度天体物理研究所的S.S. Hasan博士将研究太阳上的强通量管。对小规模太阳磁场的研究是针对太阳物理学中一个基本的、尚未解决的问题，即主要发生在磁通管中的安静色球的加热。本研究旨在通过1.5维随时间变化的动力学计算来检验坍塌通量管的稳定性、动力学、能量输运和振荡。使用二维辐射传输，将是一个显着的改进，比以往的分析。这项研究的结果将有助于理解通量管的物理性质，明亮色球的结构，以及通量管中大气的长周期振荡。范围：该项目与哈佛-史密森天体物理中心的W. Kalkofen及其同事在辐射传输和班加罗尔印度天体物理研究所的ss . Hasan及其同事在磁场方面的努力相结合。它将开始哈佛研究辐射转移、静态磁场和色球加热问题的小组与班加罗尔研究随时间变化的磁场、太阳磁场和色球线的小组之间的合作。Drs。Kalkofen和Hasan是非常能干的研究人员，印度天体物理研究所在研究太阳方面有着优秀的传统。

Technical Narrative: In a joint research project, Dr. Wolfgang Kalkofen of the Harvard-Smithsonian Center for Astrophysics, Cambridge and Dr. S.S. Hasan of the Indian Institute of Astrophysics, Bangalore will study intense flux tubes on the sun. This investigation of small-scale solar magnetic fields is directed towards a fundamental, unsolved problem in solar physics, the heating of the quiet chromosphere which takes place mainly in magnetic flux tubes. This investigation seeks to examine the stability, dynamics, energy transport and oscillations in collapsing flux tubes by means of 1.5-D time-dependent, dynamical calculations. The use of two-dimensional radiative transfer, will be a significant improvement over previous analyses. The results of this study will help in understanding the physics of flux tubes, the structure of the bright chromosphere, and long-period oscillations of the atmosphere in flux tubes. Scope: This project joins efforts in radiative transfer by W. Kalkofen and colleagues at the Harvard-Smithsonian Center for Astrophysics and in magnetic fields by S.S. Hasan and colleagues at the Indian Institute of Astrophysics in Bangalore. It will begin collaboration between the Harvard group working on problems in radiative transfer, static magnetic fields and chromospheric heating and the Bangalore group investigating time-dependent magnetic fields, solar magnetic fields and chromospheric lines. Drs. Kalkofen and Hasan are highly competent researchers and the Indian Institute of Astrophysics has an excellent tradition of research on the Sun.