Browsing Scholarly Works, Department of Physics by Title
Now showing items 798-811 of 811
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The W mass and the U parameter
(2003) -
Water-pollution monitoring using matched spatial filters
(Optical Society of America, 1976-02)Presented are some results obtained from the application of matched spatial filtering techniques to the identification of biological specimens called diatoms (i.e., water algae). A prototype semiautomatic optical processor ... -
Wave-function vortex attachment via matrix products: Application to atomic Fermi gases in flat spin-orbit bands
(Amer Physical Soc, 2014-03-31) -
Weak hard X-ray emission from two broad absorption line quasars observed with NuSTAR: Compton-thick absorption or intrinsic X-ray weakness?
(IOP Publishing Ltd., 2013-08)We present Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of two X-ray weak broad absorption line (BAL) quasars, PG 1004+130 (radio loud) and PG 1700+518 (radio quiet). Many BAL quasars appear X-ray ... -
Why double-stranded RNA resists condensation
(2014-09-15)The addition of small amounts of multivalent cations to solutions containing double-stranded DNA leads to inter-DNA attraction and eventual condensation. Surprisingly, the condensation is suppressed in double-stranded RNA, ... -
Wilson lines and Chern-Simons flux in explicit heterotic Calabi-Yau compactifications
(Springer, 2015-02-27)We study to what extent Wilson lines in heterotic Calabi-Yau compactifications lead to non-trivial H-flux via Chern-Simons terms. Wilson lines are basic ingredients for Standard Model constructions but their induced H-flux ... -
WISE detections of known QSOs at redshifts greater than six
(IOP Publishing Ltd., 2013-12)We present WISE All-Sky mid-infrared (IR) survey detections of 55% (17/31) of the known QSOs at z > 6 from a range of surveys: the SDSS, the CFHT-LS, FIRST, Spitzer, and UKIDSS. The WISE catalog thus provides a substantial ... -
Witten index for noncompact dynamics
(Springer, 2016-06-16)Among gauged dynamics motivated by string theory, we find many with gapless asymptotic directions. Although the natural boundary condition for ground states is L-2, one often turns on chemical potentials or supersymmetric ... -
Wulff shapes and the critical nucleus for a triangular Ising lattice
(American Physical Society, 2001-02)Equilibrium Wulff shapes and interfacial energies of two-dimensional "crystals" on a triangular lattice are considered. Asymptotic approximations are constructed for both the shapes and energies in the limit T-->0 where ... -
X-ray absorption analysis of MCG-6-30-15: Discerning three kinematic systems
(IOP Publishing Ltd., 2010-01)By analyzing the X-ray spectrum of MCG -6-30-15 obtained with the High Energy Transmission Grating (HETGS) spectrometer on board the Chandra observatory, we identify three kinematically distinct absorption systems; two ... -
XMM-Newton RGS observation of the warm absorber in Mrk 279
(EDP Sciences, 2010-09-10)Context. The Seyfert 1 galaxy Mrk 279 was observed by XMM-Newton in November 2005 on three consecutive orbits, showing significant short-scale variability (average soft band variation in flux ~20%). The source is known to ... -
XMM-Newton unveils the complex iron K alpha region of Mrk 279
(EDP Sciences, 2010-03-04)We present the results of a similar to 160 ks-long XMM-Newton observation of the Seyfert 1 galaxy Mrk 279. The spectrum shows evidence of both broad and narrow emission features. The FeK alpha line may be equally well ... -
α-states in de Sitter space
(American Physical Society, 2005-02)Field theory in de Sitter space admits a one-parameter family of vacua determined by a superselection parameter alpha. Of these vacua, the Euclidean vacuum uniquely extrapolates to the vacuum of flat Minkowski space. States ...