منابع مشابه
Study of Ionized Gases
Thirty-four prizes and awards will be presented during special sessions at three spring meetings of the Society: the 2010 March Meeting, March 15-19, in Portland, OR, the 2010 “April” Meeting, February 13-16, in Washington, DC, and the 2010 Atomic, Molecular and Optical Physics Meeting, May 25-29, in Houston, TX. Citations and biographical information for each recipient follow. The Apker Award ...
متن کاملHighly Ionized High Velocity Clouds
We have recently used the Hubble Space Telescope to study a pair of high velocity clouds in the direction of Mrk 509 that have unusual ionization properties. They exhibit strong C iv absorption with little or no low ion absorption or H i 21 cm emission. As the closest known analog to the outer diffuse halos of damped Lyα absorbers and the low N(H i) metal line absorption systems seen in the spe...
متن کاملScreened cluster expansions for partially ionized gases
We consider a partially ionized gas at thermal equilibrium, in the Saha regime. The system is described in terms of a quantum plasma of nuclei and electrons. In this framework, the Coulomb interaction is the source of a large variety of phenomena occuring at different scales: recombination, screening, diffraction, etc. In this paper, we derive a cluster expansion adequate for a coherent treatme...
متن کاملIn Highly Ionized High-velocity Clouds
We present a Far-Ultraviolet Spectroscopic Explorer survey of highly ionized high-velocity clouds (HVCs) in 66 extragalactic sight lines with S/N1030 >8. We searched the spectra for high-velocity (100 < |vLSR| < 400km s ) O VI absorption and found a total of 63 absorbers, 16 with 21 cmemitting H I counterparts and 47 “highly ionized” absorbers without 21 cm emission. The highly ionized HVC popu...
متن کاملZero Sound in Dipolar Fermi Gases
We study the propagation of sound in a homogeneous dipolar gas at zero temperature, known as zero sound. We find that below a critical dipolar interaction, undamped sound propagation is possible only in a range of solid angles around the direction of polarization of the dipoles. For larger interaction strength, zero sound propagates in all directions, but its nature changes as a function of dir...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1961
ISSN: 0001-4966
DOI: 10.1121/1.1936705