Oscillation modes of rapidly rotating stars have not yet been calculated with precision, rotational effects being generally approximated by perturbation methods. We are developing a numerical method able to account for the deformation of the star by the centrifugal force and, as a first step, we determined the acoustic modes of a uniform density spheroid and studied how the spheroid flatness af...

Three-dimensional numerical simulations of compressible turbulent thermally driven convection, in both slab and spheroidal geometries, are reviewed and analyzed in terms of velocity spectra and mixing length theory. The same ideal gas model is used in both geometries, and resulting ows are compared. The Piecewise-Parabolic Method (PPM), with either thermal conductivity or photospheric boundary ...

The National Elevation, Hydrography and Land Cover datasets of the United States have been synthesized into a geospatial dataset called NHDPlus which is referenced to a spheroidal Earth, provides geospatial data layers for topography on 30 m rasters, and has vector coverages for catchments and river reaches. In this article, we examine the integration of NHDPlus with the Noah-distributed model....

The exact spheroidal-function series solution for the time-harmonic acoustic scattering of a plane wave by two fluid confocal prolate spheroids is developed and numerical implementation formulated validated independent methods. define three regions in which fields are expanded terms spheroidal functions multiplied unknown coefficients. These expansions forced to satisfy boundary conditions usin...

We exploit very deep mid-IR (MIR) and X-ray observations by Spitzer and Chandra in the GOODS North field to identify signs of hidden (either starburst or AGN) activity in spheroidal galaxies between z ≃ 0.3 and 1. Our reference is a complete sample of 168 morphologically classified spheroidal (elliptical/lenticular) galaxies with zAB < 22.5 selected from GOODS ACS imaging. Nineteen of these hav...