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 19 of 19 for “"Large Magellanic Cloud"”.
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Supernova Remnants in the Large Magellanic Cloud
In addition, I have included two specific case studies, comprised of detailed multiwavelength analyses for individual LMC remnants. In one case study I have examined DEM L 316, which appears to consist of two overlapping shells. Using the correlation of optical and X-ray morphologies, the velocity …
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The structure of the Large Magellanic Cloud
… (gradient) in the oldest population in the Large Magellanic Cloud (LMC), by making use of the available RR Lyrae data from the Optical Gravitational Lensing Experiment III (OGLE III). RR Lyrae stars are amongst the oldest objects in the universe and they have a range in element (metal) …
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The structure of the large magellanic cloud
… (gradient) in the oldest population in the Large Magellanic Cloud (LMC), by making use of the available RR Lyrae data from the Optical Gravitational Lensing Experiment III (OGLE III). RR Lyrae stars are amongst the oldest objects in the universe and they have a range in element (metal) …
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The Evolution of Massive Young Stellar Objects in the Large Magellanic Cloud
This thesis presents an analysis of the largest catalog to date of infrared spectra of massive young stellar objects in the Large Magellanic Cloud. Evidenced by their very different spectral features, the luminous objects span a range of evolutionary states from those most embedded in their natal …
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XMM-Newton Survey of the Brightest Supernova Remnants in the Large Magellanic Cloud
<p>Therefore, a realistic understanding of SN contribution from SNRs populations is needed to model the evolution of a galaxy.</p>
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The Effect of the Large Magellanic Cloud on the Dark Matter Halo of the Milky Way
The Large Magellanic Cloud (LMC), the most massive satellite of the Milky Way(MW), is perturbing the dynamics and equilibrium of the MW. Understanding the nature and time evolution of these perturbations remains one of the most important challenges to the interpretation of 6D phase space …
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The Nature and Origin of Large Scale Diffuse X -Ray Emission in the Large Magellanic Cloud
X-ray mosaics of the Large Magellanic Cloud (LMC) taken with the ROSAT Position Sensitive Proportional Counter (PSPC) have revealed extensive diffuse X-ray emission, indicative of hot ≳ 106 K gas associated with this irregular galaxy on scales from ∼10 pc to ≥1000 pc. Here we examine …
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XMM-Newton Survey of the Magellanic Bridge
… of age, metallicity, and stellar density) in the Magellanic Bridge, the interconnecting region between the Small and Large Magellanic Cloud. Gardiner and Noguchi (1996) suggest that closest approach between Small and Large Magellanic Cloud, as evidenced by dramatic phase shift in star formation, …
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On understanding the lives of dead stars : Supernova Remnant N103B, radio pulsar B1951+32, and the Rabbit
… the young Supernova Remnant N103B in the Large Magellanic Cloud as part of the Guaranteed Time Observation program. N103B has a small overall extent and shows substructure on arcsecond spatial scales. The spectrum, based on 116ks of data, reveals unambiguous Mg, Ne, and O emission lines. …
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Structure and Local Properties of Dark Matter Halos
… of DM induced by satellite galaxies like the Large Magellanic Cloud (LMC) and their implications for direct detection experiments.
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The effective temperatures and physical properties of red supergiants : the effects of metallicity.
… (RSGs) in our galaxy, 39 RSGs in the Small Magellanic Cloud (SMC), and 36 RSGs in the Large Magellanic Cloud (LMC). The new effective temperature scales derived from these data are significantly warmer than those in the literature. The known distances of these stars allows a critical …
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Stellar Energy Feedback in Superbubbles
… observations of thirteen superbubbles in the Large Magellanic Cloud (LMC). The diffuse X-ray emissions from these superbubbles are brighter than expected for wind-blown bubbles, suggesting that the emissions have been enhanced by interactions between the shells and interior SNRs. In the fourth …
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Multi-wavelength study of neutron stars in the Magellanic Clouds
… timing study of candidate X-ray binaries in the Large Magellanic Cloud (LMC), resulting in a 50% increase in the confirmed population of accreting neutron stars in the LMC. Following this study, I carry out a targeted radio pulsar search in the Small Magellanic Cloud (SMC), leading to the …
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The environmental impact of high- and low-mass stars: from formation to main sequence
… the interplay of magnetic fields and collapsing clouds, and (2) the effects of radiation from massive stars. We first compare polarization measurements of 52 Galactic star-forming regions with their locations in the Galaxy. In particular, we find that there is no correlation between the average …
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Determining the jet opening-angle of gamma-ray bursts
… 1987, a supernova (SN 1987A) was detected in the Large Magellanic Cloud - its progenitor was a blue, rapidly rotating supergiant that was probably a member of a binary system that underwent merger prior to the supernova event [1]. Was SN 1987A a (possibly failed) hypernova? Although no …
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Chemodynamics of the Galactic Halo
… there exists frameworks for developing both large N-body and smaller tailored simulations of galaxies which allow us to test unsolved questions. In this PhD dissertation, I present research from six published or submitted first-author papers that speak to a wide variety of these aspects of …
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Comprehensive analyses of massive binaries and implications on stellar evolution
… exhaustive analysis of the binary R 145 in the Large Magellanic Cloud (LMC), which was claimed to host the most massive stars known. We were able to disentangle the spectrum of the system, and performed an orbital, polarimetric, and spectral analysis, as well as an analysis of the wind-wind …
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Fast Stars in the Milky Way
… in the Galactic centre by showing that a Large Magellanic Cloud (LMC) origin better explains their distribution on the sky. In Ch. 5 I present three ground-breaking hypervelocity results with Gaia DR2: 1) only 41 of the 524 hypervelocity star candidates are truly escaping, 2) at least one …
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Simulations of Galaxy Formation and Large Scale Structure
… experiments on galaxies and even on the large scale structure of the Universe. The latter is possible because of the extraordinary fact that as a result of microwave background observations the properties of the Universe some 300,000 years after the Big Bang are well known. As ordinary …