First-principles investigation of the interaction between pentacene molecules and monolayer transition metal dichalcogenides (2024)
Thesis
Black, E. J. First-principles investigation of the interaction between pentacene molecules and monolayer transition metal dichalcogenides. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/1018715

The search for new materials for photonic applications continues to expand, and one promising route is that of van der Waals heterostructures. Assembled layer by layer from atomically thin materials, there are combinations of materials with promising... Read More about First-principles investigation of the interaction between pentacene molecules and monolayer transition metal dichalcogenides.

The fate of massive single stars: exploring the impact of rotation and metallicity (2024)
Thesis
Chambers, C. S. The fate of massive single stars: exploring the impact of rotation and metallicity. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/1018847

The fate of massive stars depends largely on the mass and structure of their inner cores, and the composition of their envelopes at death. This is dependent on the mass loss history of the star, which has significant effects on the evolution of massi... Read More about The fate of massive single stars: exploring the impact of rotation and metallicity.

Fundamental parameters of very low mass stars in eclipsing binary systems (2024)
Thesis
Fitzpatrick, E. Fundamental parameters of very low mass stars in eclipsing binary systems. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/956373

Photometry of binary star and extrasolar planet transits offer an opportunity to characterise their components and test stellar models. When investigating exoplanets, it is important properly understand the host star otherwise large systematic errors... Read More about Fundamental parameters of very low mass stars in eclipsing binary systems.

Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission (2024)
Thesis
Harris, B. M. (2024). Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/775271

Context. Scheduling observing time for the CHEOPS mission leaves short gaps in which the telescope goes unused. If data collected during these gaps provided quality results, they could be utilised to make observing time more efficient.
Aims. The ai... Read More about Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission.

Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars (2024)
Thesis
Jennings, Z. P. S. (2024). Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/775631

Precise stellar parameter measurements are crucial for improving our theoretical understanding of stellar structure. They help quantify model errors and uncertainties and provide vital constraints for interpreting observed phenomena, such as radius i... Read More about Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars.

Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory (2023)
Thesis
Rizzuti, F. (2023). Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/674565

The present knowledge of stellar evolution is still limited today by large uncertainties that derive from the complex multi-dimensional processes occurring in stars. Among them, the turbulent motions of the stellar fluid control the size and evolutio... Read More about Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory.

The dynamics of star formation in the local Milky Way as traced by OB associations (2023)
Thesis
Quintana Isasi, A. L. P. (2023). The dynamics of star formation in the local Milky Way as traced by OB associations. (Thesis). Keele University

OB associations are gravitationally unbound, low-density groups of young stars delineated by bright OB stars. At the intersection of star formation and Galactic structure, they are important across many areas of astronomy. However, most historical OB... Read More about The dynamics of star formation in the local Milky Way as traced by OB associations.

Machine learning identification of massive young stellar objects in Local Group galaxies (2023)
Thesis
Kinson, D. A. (2023). Machine learning identification of massive young stellar objects in Local Group galaxies. (Thesis). Keele University

This thesis presents the development and implementation of a machine learning classification of massive Young Stellar Objects (YSOs) in two Local Group galaxies, NGC6822 and M33. Using archival near- and far-IR data, point sources in both galaxies ar... Read More about Machine learning identification of massive young stellar objects in Local Group galaxies.

Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds (2023)
Thesis
Pennock, C. M. (2023). Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds. (Thesis). Keele University

I present an analysis of a new 120 deg2 radio continuum image of the Large Magellanic Cloud (LMC) at 888 MHz with a bandwidth of 288 MHz and beam size of 13.′′9×12.′′1, from the Australian Square Kilometre Array Pathfinder (ASKAP). I constructed a ca... Read More about Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds.

Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy (2023)
Thesis
Spyratos, P. (2023). Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy. (Thesis). Keele University

Transiting hot gas giant exoplanets are great targets for atmospheric investigations due to their extended atmospheres and their strong obscuring effect on the observed starlight when they pass in front of their host star. Transmission spectroscopy c... Read More about Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy.

Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite (2023)
Thesis
Swayne, M. I. (2023). Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite. (Thesis). Keele University

Observations of low-mass stars have frequently shown unexpectedly large stellar radii when compared to the predictions from theoretical stellar structure models. This “radius inflation” problem may have consequences not just for stellar science but a... Read More about Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite.

Fundamental effective temperature measurements for eclipsing binary stars (2022)
Thesis
Miller, N. J. (2022). Fundamental effective temperature measurements for eclipsing binary stars. (Thesis). Keele University

Modern high-precision spectroscopy and photometry has made it possible to directly measure masses and radii for stars in detached eclipsing binaries (DEBs) to 0.5% or better. These stars, due to their wide orbits, are suitable for testing models of s... Read More about Fundamental effective temperature measurements for eclipsing binary stars.

Internal mixing processes in massive stars: uncertainties and impact (2022)
Thesis
Kaiser, E. (2022). Internal mixing processes in massive stars: uncertainties and impact. (Thesis). Keele University

Massive stars are key contributors to the evolution of galaxies and many observed phenomena. Therefore, understanding them is crucial to explain the evolution of the Universe and its constituents. The evolution of massive stars is strongly in uenced... Read More about Internal mixing processes in massive stars: uncertainties and impact.

Convective boundary structure and mixing in stellar interiors (2021)
Thesis
Scott, L. J. A. (2021). Convective boundary structure and mixing in stellar interiors. (Thesis). Keele University

The treatment of convection remains one of the key uncertainties in stellar evolution. In particular, mixing processes at the boundaries of convective regions are complex and diffcult to define analytically. Therefore, hydrodynamic simulations are us... Read More about Convective boundary structure and mixing in stellar interiors.

Combining asteroseismic and s-process nucleosynthesis observations to constrain the evolution of rotating low-mass stars (2020)
Thesis
den Hartogh, J. W. (2020). Combining asteroseismic and s-process nucleosynthesis observations to constrain the evolution of rotating low-mass stars. (Thesis). Keele University

In this thesis, I study the evolution of low-mass (around 2 M?) solar-metallicity stars including the effect of rotation and magnetic fields. These stars produce a significant amount of elements heavier than iron via the so-called s process and thus... Read More about Combining asteroseismic and s-process nucleosynthesis observations to constrain the evolution of rotating low-mass stars.

Confirmation of exoplanet candidates in the Wide-Angle Search for Planets survey via Doppler tomography (2020)
Thesis
Temple, L. Y. (2020). Confirmation of exoplanet candidates in the Wide-Angle Search for Planets survey via Doppler tomography. (Thesis). Keele University

This work reports the discovery of four new exoplanets, with host stars in the relatively sparse spectral type range mid-F–A. The planets were discovered using the transit method and confirmed via Doppler tomography. The first is WASP-167b/KELT-13b,... Read More about Confirmation of exoplanet candidates in the Wide-Angle Search for Planets survey via Doppler tomography.

Pre-main-sequence populations and young stellar variability in the Large Magellanic Cloud (2020)
Thesis
Zivkov, V. (2020). Pre-main-sequence populations and young stellar variability in the Large Magellanic Cloud. (Thesis). Keele University

Detailed studies of intermediate- and low-mass pre-main-sequence (PMS) stars outside the Galaxy have so far been conducted only for small targeted regions harbouring known star formation complexes. This work presents a comprehensive analysis of the P... Read More about Pre-main-sequence populations and young stellar variability in the Large Magellanic Cloud.

Dynamics of outflows driven by winds from supermassive black holes (2019)
Thesis
Green, L. (2019). Dynamics of outflows driven by winds from supermassive black holes. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/415217

Feedback is a key element of galaxy evolution, and the accretion of gas onto a central supermassive black hole (SMBH) is an important source of feedback. Modelling the energy released as an optically thick wind (with speed vw) allows observable relat... Read More about Dynamics of outflows driven by winds from supermassive black holes.

X-ray spectral variability of disk winds in a sample of local active galactic nuclei (2019)
Thesis
Costa, M. T. (2019). X-ray spectral variability of disk winds in a sample of local active galactic nuclei. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/414944

In this thesis I will present the culmination of my research into the phenomenon of AGN winds using several X-ray telescopes (Suzaku, XMM-Newton and NuSTAR); I will do this primarily through the use of radiative transfer models (Sim et al. 2010). I w... Read More about X-ray spectral variability of disk winds in a sample of local active galactic nuclei.

Fundamental parameters of subgiant stars in detached eclipsing binary systems (2019)
Thesis
Evans, J. A. (2019). Fundamental parameters of subgiant stars in detached eclipsing binary systems. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/413063

Detailed studies of stars in long-period, detached eclipsing binary systems remain one of the best ways to test stellar evolutionary models. With so many detections of planets outside of the solar system, research has turned to the characterisation o... Read More about Fundamental parameters of subgiant stars in detached eclipsing binary systems.