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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 78 for “"Light Curve"”.
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Analysis of Pluto's light curve to detect volatile transport
… these changes, a model was created to synthesize light curves of Pluto, given the viewing geometry and surface albedo distribution. Using an initial surface albedo distribution based on images taken by New Horizons, changes in the light curve mean magnitudes and amplitudes over time were compared …
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Observations and Light Curve Analysis of Transiting Extra-Solar Planets
The purpose of this research was to perform the procedures to study transiting exoplanets in their entirety, from the data collection process to determining physical characteristics and orbital properties. The research was conducted with two telescopes of different sizes (16” and 12”) at multiple …
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Characterizing Exoplanet Atmospheres: From Light-curve Observations to Radiative-Transfer Modeling
Multi-wavelength transit and secondary-eclipse light-curve observations are some of the most powerful techniques to probe the thermo-chemical properties of exoplanets. Although the large planet-to-star brightness contrast and few available spectral bands produce data with low signal-to-noise …
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Rotation Period Distributions and Light Curve Morphologies of Low Mass Stars and Young Associations
<p>This dissertation is centered around the rotation periods of low-mass stars and association of young stars. Rotation periods are a link to the age of the star, as they lose angular momentum over time. To understand how this angular momentum evolves requires understanding the rotation period …
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Modeling Pluto's light curve in the near infrared : implications for observation post new horizons
… surface on ground-based observations of Pluto's light curve were studied. Due to Pluto's eccentricity of 0.249, obliquity of 123 degrees, and atmosphere, the transfer of volatiles may cause global surface change over the course of Pluto's orbit. Magellan visible and near infrared data were …
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Cosmology Using Photometric Samples of Type Ia Supernovae: The First Joint Photometric Light Curve Analysis
… SNe occur in. Dust attenuates and reddens SNIa light curves, obscuring the true properties and astrophysical origins of the SNIa explosion. Here I combine the results of my four first-author papers in non-chronological order, laying out the steps I took to perform a cosmology analysis from start …
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The Implementation of Stellar Occultation Light Curve Modelling for Arbitrary Planetary Atmospheric Structures and the Analysis of Pluto’s Occultation Light Curves and Its Atmosphere
For decades, the analyses of stellar occultation light curves have been the most efficient method to study atmosphere of small solar system bodies. The variation in stellar flux due to the refraction in planetary atmosphere is directly related to the temperature profile of the planetary atmosphere. …
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Analysis of exoplanetary transit light curves
… to our observing perspective. In this event, the light curve measured for the host star features a systematic drop in flux occurring once every orbital period as the exoplanet covers a portion of the stellar disk. This exoplanetary transit light curve provides a wealth of information about both …
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The analysis and interpretation of VHE (Eg > 1 TeV gamma ray measurements
… In this study it is however reasoned that some light can be shed on this dilemma by treating the data .in a more consistent way. Since one is dealing with a strong stochastic component of background cosmic radiation, the data should be analysed by means of sound statistical techniques. The …
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Variable star photometry in a secondary school curriculum
… using a 14" telescope as well as CCD and had its light curve plotted. In direct comparison, V474 Mon was observed using only a low cost $200 digital camera. Armed with a laptop for data analysis, the author plotted its light curve. Lastly, the whole process of research astronomy was applied to a …
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The role of binary stars in searches for extrasolar planets by microlensing and astrometry
… are observed, one usually measures a symmetric light curve corresponding to a single lens, or an asymmetric light curve, often with caustic crossings, in the case of a binary lens system. In principle, the fraction of binary stars at a certain separation range can be estimated based on the …
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A spectroscopic analysis of the eclipsing Nova-like EC21178-54
… hours. High-speed photometric analysis of its light curve reveal that this system is a rich source of quasi-periodic oscillations (QPOs), dwarf nova oscillations (DNOs) and the other type of periodic oscillations called longer period dwarf nova oscillations (lpDNOs). Its light curve shows a …
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Multiwavelength studies of classical novae
… phases, yet each nova is new and can show unique light-curve and spectral developments. Therefore, carrying out detailed multiwavelength studies of individual novae is important to provide an holistic picture of the eruption development with the ultimate aim of a general understanding of the …
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An Automated Pipeline for Variability Detection and Classification for the Small Telescopes Installed at the Liverpool Telescope
… and produces photometric time-series data named light curves of millions of objects. 590,492 of these objects have 100 or more data points of sufficient quality to attempt a variability analysis. The large volume and relatively high noise of this data necessitated the use of Machine Learning and …
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Radio observations as a tool to study shock interactions and mass ejections in novae
… of the most detailed and comprehensive radio light curves to date. In these systems a thermonuclear eruption occurs on the surface a white dwarf following extensive periods of accretion of material from a companion star. The result of the thermonuclear eruption is the explosive ejection of the …
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Photographic photometry of Magellanic Cloud cepheids
Photographic (B,V) light curves of 213 LMC and 180 SMC cepheids (and W Virginis stars) have been obtained and the relevant light-curve parameters derived. Comparison of this work with stars in common with photoelectric data indicate that the <V> and (<B> - <V>) magnitudes differ from their …
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Unravelling the nature of hydrogen-poor thermonuclear supernovae
… of thermonuclear supernovae. We present colour light curves, and optical and near-infrared spectra for SN 2015H, a type Iax supernova, beginning a few days post-explosion. We compare these observations to synthetic light curves and spectra predicted from multi-dimensional explosion models …
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Investigation of the Progenitors and Outbursts of Classical and Recurrent Novae
… Coriolis satellite from 2003-2011, we derived light curves of one Mira (O Cet) as a general example and two novae with known outbursts during 2003-2011 (V2467 Cyg and V1187 Sco). The SMEI light curves potentially reveal more details than those given by ground-based observations. The pre-maximum …
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Observational Investigations of the Progenitors of Supernovae
… an accurate reconstruction of the bolometric light curve of a core-collapse SN, which relies on only two optical filter observations – this will hugely reduce the observational cost of constructing bolometric light curves, a tool of great importance when hoping to constrain the nature of a SN …
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