Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session A1: Plenary Session I |
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Sponsoring Units: APS Chair: Curt Callan, APS Vice President, Princeton University Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), St. Lous DE |
Saturday, April 12, 2008 8:30AM - 9:06AM |
A1.00001: Science of rare isotopes: connecting nuclei with the universe. Invited Speaker: Understanding nuclei is a quantum many-body problem of incredible richness and diversity and studies of nuclei address some of the great challenges that are common throughout modern science. Nuclear physicists strive to build a unified and comprehensive microscopic framework in which bulk nuclear properties, nuclear excitations, and nuclear reactions can all be described. A new and exciting focus in this endeavor lies in the description of short-lived nuclei. The extreme isospin of these nuclei, relative to those near stability, and their weak binding bring new phenomena to the fore which isolates and amplifies important features of nuclear many-body open quantum systems. The fields of nuclear physics and astrophysics provide the link between our understanding of the fundamental constituents of nature and explaining the matter of which we and stars are made. Studies of rare isotopes elucidate fundamental questions in this area. In this talk, experimental and theoretical advances in rare isotope research will be reviewed in the context of the main scientific questions. Particular attention will bo given to the worldwide radioactive beams initiatives and to the progress in theoretical studies of nuclei due to the advent of terascale computing platforms. \newline \textbf{Reference:} Rare-Isotope Science Assessment Committee Report, The National Academies Press \newline http://books.nap.edu/openbook.php?isbn=0309104084 [Preview Abstract] |
Saturday, April 12, 2008 9:06AM - 9:42AM |
A1.00002: Recent Developments in Plasma Astrophysics Invited Speaker: Most of the baryonic matter in the universe exists in an ionized form within stars and the intergalactic medium. For many purposes, it is adequate to treat it as a fluid endowed with a bulk velocity, density, pressure etc despite the fact it is is often out of thermodynamic equilibrium. Understanding when this is justified and explaining a growing list of observed phenomena that depend upon collisionless, collective effects is the domain of plasma astrophysics. The scales exhibited by cosmic plasma phenomena range from those associated with terrestrial auroras to giant clusters of galaxies. There are many fundamental plasma processes that operate in essentially similar ways within these varied environments including the transport of momentum, heat and cosmic rays, the stretching and reconnection of magnetic field lines and the formation of collisionless shocks. Understanding these processes is a pre-requisite to accounting for such diverse observations as the acceleration of $\sim$PeV protons in nearby supernova remnants and $\sim$ZeV protons in extragalactic sources, the formation of relativistic jets and X-ray emission by accretion disks and the circumgalactic medium. Recent progress derives from remote and and in situ observations as well as large scale numerical simulations. [Preview Abstract] |
Saturday, April 12, 2008 9:42AM - 10:18AM |
A1.00003: Climate Modeling and Projections of Global Warming Invited Speaker: Physics of the climate system is captured, with varying degrees of success, in climate models used to hindcast paleoclimates and project future climate change. This talk reviews the formulation of climate models, validation/falsification of processes included, and presents research challenges for advancing projections of future climate change. [Preview Abstract] |
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