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August 2010 arXiv papers — page 54

Showing 5,301–5,306 of 5,306 papers

  1. Hydrodynamics: Fluctuating Initial Conditions and Two-particle Correlations

    hep-ph

    R. P. G. Andrade, F. Grassi, Y. Hama, W. -L. Qian

    Event-by-event hydrodynamics (or hydrodynamics with fluctuating initial conditions) has been developed in the past few years. Here we discuss how it may help to understand the various structures observed in two-particle correlations.

  2. Decreased Frequency of Strong Bars in S0 Galaxies: Evidence for Secular Evolution?

    astro-ph.GA

    R. Buta, E. Laurikainen, H. Salo, J. Knapen

    Using data from the Near-Infrared S0 Survey (NIRS0S) of nearby, early-type galaxies, we examine the distribution of bar strengths in S0 galaxies as compared to S0/a and Sa galaxies, and as compared to previously published bar strength data for Ohio State University Bright Spiral Galaxy Survey (OSUBSGS) spiral galaxies. Bar strengths based on the gravitationa

  3. Chemical Enrichment in the Faintest Galaxies: the Carbon and Iron Abundance Spreads in the Boötes I Dwarf Spheroidal Galaxy and the Segue 1 System

    astro-ph.GA

    John E. Norris, Rosemary F. G. Wyse, Gerard Gilmore, David Yong

    We present an AAOmega spectroscopic study of red giant stars in Bootes I, which is an ultra-faint dwarf galaxy, and Segue 1, suggested to be either an extremely low-luminosity dwarf galaxy or a star cluster. Our focus is quantifying the mean abundance and abundance dispersion in iron and carbon, and searching for distant radial-velocity members, in these sys

  4. On recurrence and ergodicity for geodesic flows on noncompact periodic polygonal surfaces

    math.DS

    Jean-Pierre Conze, Eugene Gutkin

    We study the recurrence and ergodicity for the billiard on noncompact polygonal surfaces with a free, cocompact action of $\Z$ or $\Z^2$. In the $\Z$-periodic case, we establish criteria for recurrence. In the more difficult $\Z^2$-periodic case, we establish some general results. For a particular family of $\Z^2$-periodic polygonal surfaces, known in the ph

  5. Interactive Visualization of the Largest Radioastronomy Cubes

    astro-ph.IM

    A. H. Hassan, C. J. Fluke, D. G. Barnes

    3D visualization is an important data analysis and knowledge discovery tool, however, interactive visualization of large 3D astronomical datasets poses a challenge for many existing data visualization packages. We present a solution to interactively visualize larger-than-memory 3D astronomical data cubes by utilizing a heterogeneous cluster of CPUs and GPUs.

  6. Ordered Phases of Itinerant Dzyaloshinsky-Moriya Magnets and Their Electronic Properties

    cond-mat.str-el

    Kwan-yuet Ho, T. R. Kirkpatrick, Yan Sang, D. Belitz

    A field theory appropriate for magnets that display helical order due to the Dzyaloshinsky-Moriya mechanism, a class that includes MnSi and FeGe, is used to derive the phase diagram in a mean-field approximation. The helical phase, the conical phase in an external magnetic field, and recent proposals for the structure of the A-phase and the non-Fermi-liquid