Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 50 for “"Star-forming galaxies"”.
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Spatially-resolved studies of nearby star-forming galaxies
Spatially-resolved studies of nearby star-forming galaxies are essential to understand various physical and chemical phenomena at play in the interstellar medium in the galaxies, and consequently to obtain a comprehensive picture of galaxy formation and evolution. In this thesis, I perform …
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Gas flows and feedback in star-forming galaxies
… gas in a sample of 40 nearby Luminous Infrared Galaxies (LIRGs: LIR ≥1011L) from Supernovae and starbursts in the infrared, SUNBIRD survey imaged with the Southern African Large Telescope (SALT). This project can be seen in two major areas. The first is analyzing the emission and absorption …
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Shocks and Metallicity Gradients in Normal Star-Forming Galaxies
… This thesis explores gas flows in local galaxies by studying metallicity gradients and galactic- scale outflows in normal star-forming galaxies. This is made possible by new integral field spectroscopy data that provide simultaneously spatial and spectral information of galaxies. First, I …
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High redshift star-forming galaxies in absorption and emission
Galaxies in the redshift range 1 < z < 3 existed during the most vigorous period of star formation in the history of the Universe. In the past 15 years, large rest-frame UV spectroscopic samples of z ∼ 3 star-forming galaxies have been assembled. However, this particular redshift range, the …
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Star-forming Galaxies and Quenched Systems throughout Cosmic Time
This thesis delves into the investigation of star-forming galaxies and quenched systems at high redshifts, exploring their evolution and properties throughout cosmic time. Firstly, I utilise the foreground lensing of massive galaxy clusters in the Hubble Frontier Fields to probe the high-redshift …
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Search for rapidly star-forming galaxies at high redshift.
… three surveys to try and locate distant star forming galaxies. The most general survey used deep 2μ images with optical CCD photometry to locate objects with peculiar SEDs. Using the IR data we should be able to locate rapidly star forming galaxies to z = 25. With a 3σ detection limit of …
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Unveiling gravitationally lensed, high-redshift dusty star forming galaxies with JWST
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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The evolution of star-forming galaxies : analysis of infrared observations by AKARI
… on the analysis of infrared observations of star-forming galaxies, all of which included observations by the AKARI Space Telescope. Spectroscopic redshifts have been measured for over 400 galaxies using the fibre spectrograph AAOmega in the AKARI Deep Field South, the first significant …
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Spectroscopic studies of star-forming galaxies and the intergalactic medium in the early Universe
… detailed spectroscopic analyses of distant galaxies well into the Epoch of Reionisation (EoR). This crucial phase transition witnessed baryonic matter, mostly in the form of cold, neutral hydrogen gas, being chemically enriched, ionised, and heated as a result of the formation of the first …
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Spatially resolved spectroscopy of faint star-forming galaxies & their environments in the high redshift universe
… with the spectroscopic observations of distant galaxies, 1 < z < 5. The galaxies presented here are intrinsically faint such that their ux is dominated by ordinary star formation rather than galaxy-galaxy merging and/or strong nuclear activity. Such studies are normally untenable owing to the …
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On the evolution of star forming galaxies : the metallicity of dwarfs and the effect of environment on local luminous IR galaxies
This thesis, entitled "On evolution of star forming galaxies: the metallicity of dwarfs and the effect of environment on local luminous infrared galaxies" is divided into two main areas. First a detailed study of the environment and star formation relationship of local Luminous Infrared Galaxies …
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Star formation and environment of galaxies
Across cosmic time, stars have contributed most of the radiant energy found in the Universe and have created nearly all the chemical elements heavier than helium. Understanding the evolution of the Universe requires understanding the history of star formation. Stars form in galaxies, which are in …
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Insights into the nature of dust attenuation in relation to galaxy evolution from local to cosmic noon galaxies
The dust attenuation in galaxies depends on numerous processes and physical properties, such as the stellar mass, the star formation rate (SFR), the metallicity, the star formation history (SFH), and the star-dust geometry, which also involves morphology and inclination. Throughout the work in this …
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Cosmology with Velocity Dispersion based Counts of Groups and the Effect of AGN Feedback on Host Galaxy Morphology
… velocity dispersion of the cluster galaxies. I show that the velocity dispersion of groups/clusters can be theoretically predicted as robustly as mass but, unlike mass, it can also be directly observed, thus circumventing the main systematic bias in traditional cluster counts …
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The Rise and Fall of Star-Forming Clumps: Formation and Evolution of the Building Blocks of Galaxies Across Cosmic Time
It is well established that many high-redshift star-forming galaxies host massive, clumpy regions of intense star formation. However, the physical mechanisms responsible for clump formation remain uncertain, largely due to the lack of observations directly linking clump properties to their …
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Studying the environmental dependence of star formation properties of galaxies in the Abell 1437 galaxy cluster and its surrounding large scale structure
… plays a crucial role in the evolution of galaxies. Recent studies show a strong bimodal distribution of galaxy properties, with red, passive galaxies dominating the bimodal distribution in dense environments, compared to blue, actively star forming galaxies dominating the bimodal …
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Galaxy evolution : near and far
The formation of stars from interstellar gas is the cornerstone of galaxy evolution. This thesis represents work undertaken in order to characterise the role of cool interstellar gas, and its relation to star formation, in galaxy evolution across cosmic time. In particular, it concentrates on star …
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The Cluster and Large Scale Environments of Quasars at z < 0.9.
… positions of quasars with respect to clusters of galaxies will give an indication of the large scale environment of quasars and potentially clues as to which formation mechanisms are likely to dominate at various redshifts. For example, galaxy mergers are most likely to occur in galaxy group …
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Studying the Building Blocks of the Universe: the faint, low-mass galaxies
Faint, low-mass galaxies are the next frontier in extending our understanding of how our universe evolved into its present-day state that we observe. As the ever-advancing technological prowess brings about the next generation of cutting-edge observational facilities, the limit down to which we can …
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Unveiling the Primary Quenching Mechanisms in Galaxies through Large Spectroscopic Surveys
Star-forming galaxies can be transformed into passive systems through a multitude of mechanisms that quench star formation, such as the halting of cold gas accretion (known as starvation) and the rapid removal of gas in AGN-driven winds. However, it remains unclear which mechanism is the most …
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