26 research outputs found
Perturbation Theory with a Variational Basis: the Generalized Gaussian Effective Potential
The perturbation theory with a variational basis is constructed and
analyzed.The generalized Gaussian effective potential is introduced and
evaluated up to the second order for selfinteracting scalar fields in one and
two spatial dimensions. The problem of the renormalization of the mass is
discussed in details. Thermal corrections are incorporated. The comparison
between the finite temperature generalized Gaussian effective potential and the
finite temperature effective potential is critically analyzed. The phenomenon
of the restoration at high temperature of the symmetry broken at zero
temperature is discussed.Comment: RevTex, 49 pages, 16 eps figure
Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
The \emph{Wide-field Infrared Survey Explorer} has surveyed the entire sky at
four infrared wavelengths with greatly improved sensitivity and spatial
resolution compared to its predecessors, the \emph{Infrared Astronomical
Satellite} and the \emph{Cosmic Background Explorer}. NASA's Planetary Science
Division has funded an enhancement to the \WISE\ data processing system called
"NEOWISE" that allows detection and archiving of moving objects found in the
\WISE\ data. NEOWISE has mined the \WISE\ images for a wide array of small
bodies in our Solar System, including Near-Earth Objects (NEOs), Main Belt
asteroids, comets, Trojans, and Centaurs. By the end of survey operations in
February 2011, NEOWISE identified over 157,000 asteroids, including more than
500 NEOs and 120 comets. The NEOWISE dataset will enable a panoply of new
scientific investigations.Comment: ApJ accepte