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...

There appears to exist a conflict between the standard structure formation theory and the existence of the faint dwarf spheroidal galaxies in the Local Group. Theoretical considerations suggest that a cold dark matter universe has been a very hostile place for the formation of small galaxies. In particular, gas would not have been able to cool and condense to form stars inside dark matter halos...

Clouds are of paramount importance for the global energy balance and, thereby, our climate. Changes in cloud cover and phase (liquid water versus ice), for example, through increased greenhouse forcing, may have significant and as of yet unknown impacts on our climate. The global climate models (GCMs) designed to predict future climate, usually model the effects of clouds using the scattering a...