U.S.-India Cooperative Research: Study of Solar Oscillations, Phase III, Award in Indian and U.S. Currency

描述：该奖项支持美国-印度合作研究：太阳振荡研究第三阶段，该研究将利用全球振荡网络组（GONG）的数据集检查太阳内部。这个由六个相同的环绕地球的振荡观测站组成的最近完成的网络将对太阳进行24小时的监视，并将产生独特的数据，这些数据不仅对太阳物理学，而且对天体物理学、日地物理学、地球物理学和核物理学都很重要。美国团队由图森国家太阳天文台（NSO）的John Leibacher领导，印度团队由乌代普尔太阳天文台（USO）乌代普尔的Arvind Bhatnagar和孟买塔塔基础研究所的S.M. Chitre领导。太阳地震学的新领域是从太阳内部随机激发的地震振动发出的太阳声波的发现而发展起来的。这个研究太阳内部结构和动力学的强大新工具可以以与地面地震学探测地球内部相同的精度探测太阳内部。在研究的第三阶段，美国和印度团队将在GONG数据激发的许多领域进行合作研究。这包括倒置；静水太阳结构；太阳包层中的氦丰度；太阳振荡的激发机制；背景太阳光谱；太阳内部深处的全球磁场；几乎稳定的流动和磁场；以及确定性趋势。范围：这个大型国际项目的美印部分非常平衡。对美国来说，乌代普尔拥有大气清澈、与图森截然相反的独特地理位置等自然属性，以及强大的基础设施资源。太阳物理学是印度科学家擅长的领域。该项目将包括USO的工作人员和来自印度首屈一指的塔塔研究所的世界级研究人员。对印度来说，该项目提供了进入日震学领域的机会，提供了最先进的仪器，并参与了一项重要的国际努力。到目前为止，这个项目已经在美印合作下出版了大量的出版物。* * *

9604910 Leibacher Description: This award supports the U.S.-India Cooperative Research: Study of Solar Oscillations Phase III, which will examine the Sun s interior utilizing the data set from the Global Oscillation Network Group (GONG). This recently completed network of six identical oscillation observing stations that circle the globe will keep the Sun under 24 hour surveillance and will yield unique data having importance not only for solar physics, but for astrophysics, solar-terrestrial physics, geophysics, and nuclear physics. The U.S. team is headed by John Leibacher of the National Solar Observatory (NSO), Tucson, and the Indian team by Arvind Bhatnagar, Udaipur Solar Observatory (USO) Udaipur, and S.M. Chitre, Tata Institute of Fundamental Research, Mumbai. The new field of helioseismology has evolved from the discovery of solar acoustic waves that emanate from randomly-excited seismic vibrations from within the Sun. This powerful new tool for studying the Sun s interior structure and dynamics can probe the interior of the Sun with the same precision that terrestrial seismology can probe the Earth s interior. During Phase III of the study, the U.S. and Indian teams will pursue collaborative research in numerous areas that have been stimulated by GONG data. These include inversions; hydrostatic Sun structure; helium abundance in the solar envelope; excitation mechanisms for solar oscillations; background solar spectrum; global magnetic fields in the sun s deep interior; nearly steady flows and magnetic fields; and deterministic detrending. Scope: The U.S.-India component of this large international project is exceptionally well balanced. For the United States, Udaipur has physical attributes such as atmospheric clarity and a unique geographic position on the globe diametrically opposite to Tucson, as well as strong infrastructural resources. Solar physics is a field in which Indian scientists excel. The project will involve USO staff and w orld class researchers from India s premier Tata Institute. For India, the project offers entry to the field of helioseismology, state-of -the-art instrumentation, and involvement in an important international effort. This project has thus far yielded a large number of publications under U.S.-Indian authorship. ***