U.S.-U.K. Cooperative Research: Stellar Opacities and Atomic Data

该奖项将支持博士之间的合作研究。 A.K. Pradhan和D.米哈拉斯，俄亥俄州州立大学，和两个 英国天文学家小组的指导下，博士。 P.G.伯克，皇后大学，贝尔法斯特和M。西顿 伦敦大学学院，伦敦。建议的目标 研究是进行精确的大规模计算， 原子数据和恒星不透明度的信息 在过去的七年里，一个重大的国际项目 进行大规模的原子计算 最终目的是计算 前所未有的精准度 恒星物质的不透明度 在结构和进化中起着重要作用， 恒星，因为它控制着放射性能量的传输， 几乎所有恒星的某些区域。 恒星的不透明度是 也与不稳定性有关， 上升到恒星的脉动，这是重要的，在一些 在当前天文学研究中的重要性。 的目的 拟议的研究项目，这是一个联合合作， 在美国的原子物理学家和天文学家之间 王国，美国，德国、法国、联邦共和国 和委内瑞拉，将采用最先进的原子物理学 能够产生基本原子的方法 参数，如振子强度和光电离 横截面，以高精度的范围内， 5- 10%。 该项目由M博士领导。西顿和PG 伯克 该奖项将允许成员参与 美国队。合作将受益于 Mihalas博士在恒星大气方面的广泛专业知识 普拉丹博士在原子物理学。

This award will support collaborative research between Drs. A.K. Pradhan and D. Mihalas, Ohio State University, and two groups of British astronomers under the direction of Dr. P.G. Burke, Queens University, Belfast and Dr. M. Seaton, University College, London. The objective of the proposed research is to carry out accurate large scale calculations of atomic data and stellar opacities. For the last seven years a major international project has been underway to carry out large scale atomic calculations with the final aim of calculating stellar opacities of unprecedented precision. The opacity of stellar material plays a fundamental role in the structure and evolution of stars, as it controls the transport of radioactive energy in some regions of virtually all stars. The stellar opacity is also intrinsically involved in the instabilities that give rise to stellar pulsation, which are important in a number of respects in current astronomical research. The aim of the proposed research project, which is a joint collaboration between atomic physicists and astronomers in the United- Kingdom, the U.S., the Federal Republic of Germany, France and Venezuela, is to employ state-of-the-art atomic physics methods that are capable of yielding the basic atomic parameters, such as oscillator strengths and photoionization cross sections, to a high degree of accuracy in the range of 5-10%. The project is being led by Drs. M. Seaton and P.G. Burke. This award will permit the participation of members of the U.S. team. The collaboration will benefit from the extensive expertise of Dr. Mihalas in stellar atmosphere theory and Dr. Pradhan in atomic physics.