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 12 of 12 for “"eclipsing binary"”.
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The DA + dM eclipsing binary : EC13471-1258
Includes abstract. Includes bibliographical references (leaves 76-77).
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A Photometric Study of the Eclipsing Binary V574 Lyrae
… unparalleled insight into stellar evolution and eclipsing binary variables are particularly excellent laboratories for determining stellar physical parameters and behavior. These parameters, when taken with those of other stars, can be used to evaluate current theories on stellar evolution and …
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The identification and classification of variability in stellar sources observed with SuperWasp
… differentiation of Beta Lyrae and W UMa eclipsing binary stars using eclipse-depth ratio; identification of RR Lyrae stars exhibiting the Blazhko effect; and, the presence of the Oosterhoff dichotomy in the Milky Way. During this work, period/amplitude ranges and distribution maps were …
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First autonomous telescope at Wallace Observatory : impact and preliminary results
… images. Data were taken on T-And0-15785, an eclipsing binary star, in order to test and characterize the system. The out-of-ecliptic R magnitude of T-AndO-15785 was found to be 13.487 ± 0.016. The magnitude changes for the primary and secondary eclipses were found to be 0.72 ± 0.036 and 0.62 …
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Eclipsing Binaries and Period Changes in the SuperWASP Archive
… of this research project has been to investigate eclipsing binaries using archival data from the SuperWASP (Wide Angle Search for Planets) survey, and specifically to search for evidence of orbital period variations. The short cadence and long time base of SuperWASP light curves make them highly …
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An analysis of beta cephei stars in NGC 3293 and the effects of stellar rotation
… One of the stars is identified as a member of an eclipsing binary system, only the second β Cephei star to be identified as such. Physical parameters of the system are determined. The effects of rapid rotation (specifically, the distortion of the stellar profile from a perfect sphere) on …
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Photometric techniques for exoplanet detection: the construction and deployment of the KELT-South telescope
… as exoplanet candidates, each being a blended eclipsing binary system. The remaining six candidates are awaiting follow-up observations at present. Although the commissioning dataset served primarily to refine the data reduction pipeline and the procedures I used to find variable stars, I have …
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Constraining Stellar Evolution in Young Open Clusters with NGTS
… Complex and to characterise a low-mass eclipsing binary (EB) in a triple-star system located in the Blanco 1 open cluster. By combining NGTS observations with additional photometry and spectroscopy, and by developing a novel method for extracting radial velocities of close binary (or …
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Binary Star Systems with Asymmetrically Heated Disks: Thermal Phase Curves for the Disk in Epsilon Aurigae
<p>Epsilon Aurigae is a long-period eclipsing binary that contains a warm F-star (~7750 K) and a circumstellar disk enshrouding a hidden companion, likely to be a hot B-star (>15,000 K). The eclipse itself lasts just over two years---thanks, in part, to the size of the disk---and occurs every …
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Spectropolarimetry of epsilon Aurigae: Probing Stellar and Disk Atmospheres
<p>The bright eclipsing binary system epsilon Aurigae offers a unique opportunity to uncover physical mechanisms contributing to disk formation and evolution and to explore the relationship between photospheric anisotropies, stellar pulsation and mass loss. This research contributes to our …
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An Automated Pipeline for Variability Detection and Classification for the Small Telescopes Installed at the Liverpool Telescope
… of zero and one. This method was designed to fit eclipsing binary phased light curves however were also described to be fully capable on other variable star types. The optimisation method used by PolyFit is replaced by a novel genetic algorithm optimisation routine to fit the model to Skycam data …
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Identifying Exoplanets and Unmasking False Positives with NGTS
… signals, are frequently mimicked by blended eclipsing binaries, allowing me to quantify and prepare strategies for candidate vetting and follow-up. Second, I developed a centroiding algorithm for NGTS, achieving a precision of 0.25 milli-pixel in a CCD image (published in Günther et al., …