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 32 for “"star formation history"”.
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Star Formation History of the Milky Way Galaxy Disk Using a Hierarchical Model
… dwarfs can tell us a lot about the Galaxy's history. White dwarfs are the remnants of stellar evolution, providing an age dating method for various Galactic populations. This thesis focuses on the WDs from the thick disk of the Milky Way galaxy. Statistical methods are used to compute the age …
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On the complex stellar populations of ancient stellar systems
… vicinity of the Milky Way provides a wealth of information on the conditions, in the early Universe, that led to the properties we observe today in galaxies and in their constituent components. Resolved stellar populations enable us to gain detailed insights on the age and chemical composition of …
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The core collapse supernova rate in the sdss-ii supernova survey
… the data, and its implications on the cosmic star formation history are considered.</p>
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Multi-Wavelength Extragalactic Surveys: Star Formation of IR-Submm Selected Galaxies
… a range of redshifts in order to evaluate the star formation history over cosmic time. Explicitly focusing on the infrared to submillimetre regime, I carried out a comprehensive multi-wavelength approach at the North and South Ecliptic Poles (NEP/SEP). I explore four different methods to select …
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The Andromeda Optical and Infrared Disk Survey
… interstellar medium, revealing stories of galaxy formation and evolution. How we interpret this light depends in part on our proximity to the galaxy. For nearby galaxies, detailed star formation histories can be extracted from the resolved stellar populations, while more distant galaxies feature …
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The automated detection and multiwavelength properties of LADUMA HI galaxies
… investigate the neutral atomic hydrogen (HI) and star formation history (SFH) properties of 104 low redshift (0 < zHI < 0.088) galaxies from the Looking At the Distant Universe with the MeerKAT Array (LADUMA) survey. LADUMA is a deep and narrow HI emission survey underway with the MeerKAT …
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The type IA supernova rate in intermediate redshift galaxy clusters
… of the intra-cluster medium, constrain the star formation history of cluster galaxies, aid us in the investigations of the progenitor systems of SNe Ia, act as tracers of the intra-cluster stellar population and can be used in measuring distances over extragalactic scales, which is relevant …
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XMM-Newton Survey of the Magellanic Bridge
… Cloud, as evidenced by dramatic phase shift in star formation, occurred approximately 200 Myr ago. During the approach, gas had been tidally stripped (most likely from the Small Magellanic Cloud) into the interconnecting Bridge. According to models of star formation history (Harris, 2007), …
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Stochastinė galaktikų diskų evoliucija. 2-D modeliai /
Understanding of star formation processes in galaxy disks is one of the most important problems of the contemporary astrophysics. Despite fast-growing amounts of observational data, which allow studies of star formation in galaxy disks, there is a lack of fast and robust models for the analysis of …
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Starbursts in extragalactic giant H II regions
… (EGHRs) are sites of active, concentrated star formation on manageable scales, and thus provide ideal labs to analyze starburst phenomena. To get a complete picture of the starburst phenomenon, the critical characteristics we must investigate include star formation history and the interplay …
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Accreting Compact Objects in Technicolor: Multiwavelength Characterization of High Mass X-ray Binaries in the Local Group
… systems that contain a compact object (neutron star or black hole) that accretes mass from a massive stellar companion. HMXBs are highly observable due to their bright X-ray luminosities, making them an observational window into the complex process of massive binary stellar evolution. In this …
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The accuracy of integrated star clusters parameters. The effects of stochasticity /
Star clusters are important tools to probe the star formation history in their host galaxy. The physical parameters (age, mass, extinction, and metallicity) of star clusters with integrated broad-band photometry are traditionally derived using the Simple Stellar Population models (SSP). However, …
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Integralinių žvaigždžių spiečių parametrų tikslumas. Stochastiniai efektai /
Star clusters are important tools to probe the star formation history in their host galaxy. The physical parameters (age, mass, extinction, and metallicity) of star clusters with integrated broad-band photometry are traditionally derived using the Simple Stellar Population models (SSP). However, …
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Resolved stellar populations: watching galaxy evolution in real time
… over cosmic time. So one can interpret from the star formation history the evolution of the star formation rate throughout the galaxy and the evolution of the mass and metallicity distributions. The system that has been studied in this project is the nearby galaxy M33, located in the Local Group. …
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Modelling the star formation histories of nearby elliptical galaxies
… in the literature purporting to give the star formation history of a galaxy, or group of galaxies, where this is deduced from Lick observations taken from a single instrument, without separate verification from at least one other source. Within these limitations, this thesis also …
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Formation of the first galaxies under stellar feedback
… is a crucial ingredient for modeling galaxy formation, especially for the first galaxies, which are susceptible to stellar feedback due to their shallow potential wells. In this thesis I have investigated the impact of stellar feedback from the first generation of metal-free massive stars on …
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Spatially resolved spectroscopy of faint star-forming galaxies & their environments in the high redshift universe
… 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 faintness of this type of galaxy. The approach used in this work is to select objects gravitationally-lensed by massive …
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A spectroscopic and photometric study of stellar populations in a sample of clusters in the Magellanic Clouds
… evolution and to obtain a detailed view of the star formation history and chemical enrichment of the Clouds. The results discussed here are based on the analysis of high-resolution photometric and spectroscopic datasets obtained by using the last generation of imagers and spectrographs. The …
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