24 research outputs found
Analysis of Oscillations and Defect Measures for the Quasineutral Limit in Plasma Physics
We perform a rigorous analysis of the quasineutral limit for a hydrodynamical
model of a viscous plasma represented by the Navier Stokes Poisson system in
. We show that as the velocity field strongly
converges towards an incompressible velocity vector field and the density
fluctuation weakly converges to zero. In general the limit
velocity field cannot be expected to satisfy the incompressible Navier Stokes
equation, indeed the presence of high frequency oscillations strongly affects
the quadratic nonlinearities and we have to take care of self interacting wave
packets. We shall provide a detailed mathematical description of the
convergence process by using microlocal defect measures and by developing an
explicit correctors analysis. Moreover we will be able to identify an explicit
pseudo parabolic pde satisfied by the leading correctors terms. Our results
include all the previous results in literature, in particular we show that the
formal limit holds rigorously in the case of well prepared data.Comment: Submitted pape
Emplacement and deformation of Archaean gold-bearing quartz veins, Norseman, Western Australia
SIGLEAvailable from British Library Lending Division - LD:D57409/85 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Comparative efficacy of human simulated exposures of tedizold and linezolid against Staphylococcus aureus in the murine thigh infection model
Comparative efficacy of human simulated exposures of tedizold and linezolid against Staphylococcus aureus in the murine thigh infection model
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JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results
We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST âPrime Extragalactic Areas for Reionization and Lensing Scienceâ (PEARLS) project. PEARLS uses up to eight NIRCam filters to survey several prime extragalactic survey areas: two fields at the North Ecliptic Pole (NEP); seven gravitationally lensing clusters; two high redshift protoclusters; and the iconic backlit VV 191 galaxy system to map its dust attenuation. PEARLS also includes NIRISS spectra for one of the NEP fields and NIRSpec spectra of two high-redshift quasars. The main goal of PEARLS is to study the epoch of galaxy assembly, active galactic nucleus (AGN) growth, and First Light. Five fieldsâthe JWST NEP Time-Domain Field (TDF), IRAC Dark Field, and three lensing clustersâwill be observed in up to four epochs over a year. The cadence and sensitivity of the imaging data are ideally suited to find faint variable objects such as weak AGN, high-redshift supernovae, and cluster caustic transits. Both NEP fields have sightlines through our Galaxy, providing significant numbers of very faint brown dwarfs whose proper motions can be studied. Observations from the first spoke in the NEP TDF are public. This paper presents our first PEARLS observations, their NIRCam data reduction and analysis, our first object catalogs, the 0.9-4.5 ÎŒm galaxy counts and Integrated Galaxy Light. We assess the JWST sky brightness in 13 NIRCam filters, yielding our first constraints to diffuse light at 0.9-4.5 ÎŒm. PEARLS is designed to be of lasting benefit to the community. © 2022. The Author(s). Published by the American Astronomical Society.Open access journalThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]