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- South African Radio Astronomy ObservatoryZA45 papers
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9 papers · 1 filter
Unitary perturbations of compressed N-dimensional shifts
R. T. W. Martin
Given a purely contractive matrix-valued analytic function on the unit disc , we study the $\mc{U} (n)$-parameter family of unitary perturbations of the operator …
Deep NIR Photometry of HI Galaxies Behind the Milky Way
Wendy L. Williams, Patrick A. Woudt, Renee C. Kraan-Korteweg
Current studies of the peculiar velocity flow field in the Local Universe are limited by the lack of detection of galaxies behind the Milky Way. The contribution of the largely unk…
The Mass Distribution of the Great Attractor as Revealed by a Deep NIR Survey
R. C. Kraan-Korteweg, I. F. Riad, P. A. Woudt +2
This paper presents the analysis of a deep near-infrared J,H,Ks-imaging survey (37.5 sq deg) aimed at tracing the galaxy distribution of the Great Attractor (GA) in the Zone of Avo…
Inhomogeneities in molecular layers of Mira atmospheres
M. Wittkowski, D. A. Boboltz, M. Ireland +7
We obtained K-band spectro-interferometric observations of the Miras R Cnc, X Hya, W Vel, and RW Vel with a spectral resolution of 1500 using the VLTI/AMBER instrument. We obtained…
Ratcheting of driven attracting colloidal particles: Temporal density oscillations and current multiplicity
Andrey Pototsky, Andrew J. Archer, Sergey E. Savel'ev +2
We consider the unidirectional particle transport in a suspension of colloidal particles which interact with each other via a pair potential having a hard-core repulsion plus an at…
Fine structure of the isoscalar giant quadrupole resonance in 40Ca due to Landau damping?
I. Usman, Z. Buthelezi, J. Carter +13
The fragmentation of the Isoscalar Giant Quadrupole Resonance (ISGQR) in 40Ca has been investigated in high energy-resolution experiments using proton inelastic scattering at E_p =…