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The Hidden Universe: Investigating the Evolution of Dusty Star Formation and Gas Consumption Across Cosmic Time
(2023-06-19)
Half a century has now passed since the first observations of the Universe at infrared wavelengths,
revealing a population of dust-enshrouded galaxies, many of which were too faint to be
detected in the optical surveys ...
Tracing Massive Star Formation through a Galactic Census of Compact & Ultracompact HII Regions
(2019-09-26)
The following dissertation details the work undertaken to compile the most complete compact and ultracompact H II region catalogue to date via multi-wavelength inspection of survey data. We utilise data from the recently ...
On the Key Processes that Drive Galaxy Evolution: the Role of Galaxy Mergers, Accretion, Local Environment and Feedback in Shaping the Present-Day Universe
(2019-07-17)
The study of galaxy evolution is a fundamental discipline in modern astrophysics, dealing with how and why galaxies of all types evolve over time. The diversity of present-day galaxies is a reflection of the processes ...
Accretion Modes, AGN Feedback and Star Formation
(2016-08-23)
I study mid-infrared and star formation properties of AGN samples using infrared observations, and star-forming galaxies using radio observations in order to investigate the link between star formation, AGN activity and ...
Star Formation in LITTLE THINGS Dwarf Galaxies
(2016-04-14)
In this thesis we test and expand our current knowledge of Star Formation Laws (SF laws) in the extreme environment of dwarf irregular galaxies. We focus on the SF characteristics of our 18 galaxies sample, extending current ...
The Evolution of AGN and Their Host Galaxies
(2016-04-06)
Active galaxies have been in the forefront of astronomic research since their first discovery, at least 50 years ago (e.g. Schmidt, 1963; Matthews & Sandage, 1963). The putative supermassive black hole (SMBH) at their ...
The Environmental Dependence of Galaxy Evolution
(University of Hertfordshire, 2013-12-10)
Observations of galaxy environments have revealed numerous correlations associated
with their intrinsic properties. It is therefore clear that if we are to understand the
processes by which galaxies form and evolve, we ...
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 ...
Formation of Stars and Star Clusters in Colliding Galaxies
(2013-04-03)
Mergers are known to be essential in the formation of large scale structures and to have a
significant role in the history of galaxy formation and evolution. Besides a morphological
transformation, mergers induce important ...
Star Formation in Galaxies: From the Epoch of Reionisation to the Present Day
(2012-09-28)
In this thesis, I explore both obscured and unobscured star formation over a
large fraction of cosmic time. I use the HAWK-I Y -band science verification
data over GOODS-South, in conjunction with optical and infrared ...