Search
Now showing items 1-7 of 7
The Rotation of the Halo of NGC 6822 Determined From the Radial Velocities of Carbon Stars
(2016-08-22)
The kinematics of stars in galaxies is becoming a key means to understand the dynamics of galaxies, their formation and merger history. For many years, kinematics has been measured using integrated field techniques in the ...
Tracing Large-Scale Structure with Radio Sources
(University of Hertfordshire, 2015-02-04)
In this thesis, I investigate the spatial distribution of radio sources, and quantify their clustering strength over a range of redshifts, up to z _ 2:2, using various forms of the correlation function measured with data ...
A spectroscopic study of a large sample of L/T transition brown dwarfs
(University of Hertfordshire, 2014-09-25)
In this thesis I present the spectroscopic analysis of a large sample of L and T dwarfs,
in order to constrain the sub-stellar initial mass function and formation history. The
main points I tried to address are the ...
Studies of Metal Poor T Dwarfs in UKIDSS
(University of Hertfordshire, 2013-07-31)
I have used blue near-infrared colours to select a group of UKIDSS T dwarfs with spectral
types later than T4. From amongst these I identify two kinematic halo T-dwarf candi-
dates. Blue near-infrared colours have been ...
Galaxy Evolution and the Redshift Desert
(2011-04-26)
This thesis explores the evolution of galaxies from the onset of star formation shortly after the Big Bang until the present day. Particular emphasis lies on the redshift range z = 1.4 2.5, the
so-called “redshift ...
From Giants to Dwarfs: Probing the Edges of Galaxies
(2010-11-19)
In this thesis we address fundamental questions about what constitutes and limits an HI disc, probing the distribution of neutral gas in the outer parts of galaxies.
We use a subsample of galaxies observed as part of the ...
Interactions Between Radio-Loud Active Galaxies and Their Environments
(University of Hertfordshire, 2010-09-01)
In this dissertation, I present my work on the behaviour of different features of radio-loud active
galaxies to investigate how energy is transferred from their jets to the environment. To this end, I
have studied the ...