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Now showing items 31-40 of 81
Radio-optical analysis of extended radio sources in the first look survey field
(2010)
I combine 610 MHz Giant Metrewave Radio Telescope (GMRT) data, 1.4 GHz Very
Large Array (VLA) data and 1.4 GHz Westerbork Synthesis Radio Telescope (WSRT)
observations, encompassing a ∼ 4 square degree field (sq. deg. ...
Infrared-bright galaxies in the millennium simulation and Sunyaev Zeldovich effect contamination
(2010)
Measuring the evolution of the abundance of galaxy clusters puts constraints on cosmological parameters like the cosmological density parameter m, σ8 and the dark energy equation of state parameter, w. Current observations ...
Modelling radio galaxies in the Millennium simulation: SKA/MeerKAT sources and CMB contaminants
(University of the Western Cape, 2010)
We investigate the modelling of radio galaxies within a semi-analytic framework in the Millennium Simulation of the Virgo Consortium. The aim is to assess the radio sources contamination of Sunyaev-Zeldovich (SZ) signatures ...
Stellar masses of star forming galaxies in clusters
(University of the Western Cape, 2010)
We determine the stellar mass of star forming galaxies in the X-ray luminous cluster MS 0451.6-0305 at z ∼ 0.54. The stellar masses are estimated from fitting model spectral energy distributions (SEDs) to deep, optical ...
Dynamic variation of hydrogen dilution during hot-wire chemical vapour deposition of silicon thin films
(University of the Western Cape, 2013)
This study reports on the effects of hydrogen dilution and deposition time on six silicon thin films deposited at six specific deposition regimes. The thin film properties are investigated via X-Ray diffraction analysis, ...
Redshift-space distortions as a probe of dark energy
(University of Western Cape, 2014)
We begin by finding a system of differential equations for the background and linearly perturbed variables in the standard, ɅCDM model, using the Einstein Field Equations, and then solving these numerically. Later, we ...
Hot-wire chemical vapor deposition of silicon nitride thin films
(2013)
Amorphous silicon nitride (a-SiN:H) thin films has a multitude of applications, stemming from the tunability of the material properties. Plasma enhanced chemical vapour deposition (PECVD) is the industrial workhorse for ...
Teenage mothers’ reflections of their unintended, repeat pregnancies
(2013)
Globally, teenage pregnancy remains a disturbing phenomenon which impacts on the lives of teenagers, their families and society as a whole. Numerous attempts at addressing the problem have seen a decline in fertility rates ...
Optical properties of annealed hydrogenated amorphous silicon nitride (a-SiNx:H) thin films for photovoltaic application
(2013)
Technological advancement has created a market for large area electronics such as
solar cells and thin film transistors (TFT’s). Such devices now play an important
role in modern society. Various types of conducting, ...
Luminous red galaxies in simulations
(2010)
There have been a number of attempts to measure the expansion rate of the Universe using age-dating of Luminous Red Galaxies (LRGs).Assuming stars in LRGs form at the same time, age-dating of two populations of LRGs at ...