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 103 for “"Exoplanet"”.
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Irradiance source for exoplanet atmospheric spectra
<p>The quantity and diversity of the known exoplanets have grown in recent years. This has brought about a need for more efficient methods of narrowing down the list to those exoplanets most likely to sustain life. The Atmosphere in a Test Tube project, which began at the University of Padova, …
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Exoplanet Atmospheric Characterization using High-Precision Photometry
The field of Exoplanet is rapidly maturing hour by hour. With present and future proposed telescopes, our understanding of alien worlds is going to get much more profound. The main focus of my thesis is the study of spectral signatures in Photometric observations of exoplanets both in optical and …
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A multi-parameter approach to exoplanet habitability
… to remotely detect potential biosignatures in exoplanet atmospheres and discover signs of life beyond our Solar System. To make the most of the limited observational resources available, target selection has focused on 'habitable worlds' defined as rocky bodies orbiting their host stars at a …
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A multi-parameter approach to exoplanet habitability
… to remotely detect potential biosignatures in exoplanet atmospheres and discover signs of life beyond our Solar System. To make the most of the limited observational resources available, target selection has focused on 'habitable worlds' defined as rocky bodies orbiting their host stars at a …
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Characterising Exoplanet Atmospheres with High-Resolution Transmission Spectroscopy
Over 5000 exoplanets have been discovered in the last three decades, revealing a truly diverse population of worlds beyond our solar system. The field has accelerated rapidly towards characterising the atmospheres of exoplanets around the nearest and brightest stars with large observational surveys …
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Exoplanet atmospheric exploration and categorization through transmission spectroscopy
Transiting exoplanets provide an amazing sample through which transmission spectroscopy observations, combined with atmospheric retrieval, can characterize the atmospheres of those planets. Out of that sample, super Earth exoplanets are particularly interesting because it is expected that their …
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Transit timing variations of the exoplanet K2-25b
Transit light curves of the exoplanet K2-25b were studied to examine the possibility of transit timing variations (TTVs) in the system, which could imply the presence of a perturbing planet. Observations of K2-25b transits were taken using 14-inch and 24-inch telescopes at Wallace Astrophysical …
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Isotopes as a Tool for Exploring Exoplanet Atmospheres
… this thesis, I evaluate how we can characterize exoplanet atmospheres using isotopologues. I also extend this to the detectability of novel biosignature gases by way of carbon isotope ratios. I evaluated the detectability of ¹³CO₂ in the atmospheres of temperate terrestrial and sub-Neptune sized …
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High Contrast Imaging: Exoplanet and Low Stellar Mass Populations
… group (YMG) members. YMGs are prime targets for exoplanet imaging due to their youth (∼ 10 − 100 Myr), as any potential orbiting planet will be equivalently young and therefore luminous. Lucky imaging multiplicity surveys have recently identified hundreds of new YMG low-mass binaries, where a …
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Signal models and computational methods for robust exoplanet detection
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Towards Generalized Characterization of Exoplanet Atmospheres with Transit Spectroscopy
The field of exoplanetary sciences has grown from an era of detection to one of characterization. To date, over 4000 exoplanets have been discovered and over 50 of them have been observed with primary transit spectroscopy methods. The current population of characterized exoplanets spans a wide …
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New Advances in Exoplanet Spectroscopy from Space and Ground
Thousands of exoplanets have been discovered over the last thirty years, providing key insights into the population of planets in the galaxy. Today, atmospheric characterisation of these distant worlds is at the forefront of exoplanet science, with new observational capabilities revolutionising …
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Time-Domain Astrophysics with the Transiting Exoplanet Survey Satellite
The Transiting Exoplanet Survey Satellite (TESS) is conducting an all-sky survey with the primary aim of detecting planets orbiting nearby stars. However, its large field of view and 200 s imaging cadence are useful for other science cases, ranging from stellar astrophysics to transient science. …
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CCD photometric precision for the Transiting Exoplanet Survey Satellite (TESS)
We seek to fully characterize all noise contributions along the CCD and electronics signal path specific to the equipment to be used on board the TESS all-sky space observatory. We adjust physical variables in such a way as to minimize this noise and achieve a photometric precision limited in large …
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Mapping exoplanet clouds and albedo from phase curves and spectra
… variations in visible wavelength phase curves of exoplanets. We improve upon existing exoplanet giant planet albedo models and incorporate exoplanet general circulation models to analyze the composition and occurrence of clouds on tidally locked exoplanets. We confirm that non-uniform cloud …
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Examining the evidence for Chthonian planets : superdense exposed exoplanet cores
… work originally set out to look for evidence of exoplanet exposed iron cores; it stumbled, however, upon potential superdense core candidates (or "Chthonian" cores). We identify 19 potential superdense core candidates, and compare them to the Fossilized Core Theory and the Giant Impact Theory of …
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Characterizing Exoplanet Atmospheres: From Light-curve Observations to Radiative-Transfer Modeling
… 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 ratios, a Bayesian approach can robustly reveal what constraints we can set, without over-interpreting the data. …
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Unearth: Revealing the Effects of Stellar Activity on Exoplanet Host Stars
With the push towards finding true Earth-analogs, instrumental radial velocity (RV) precision no longer presents a limiting factor. The effects of astrophysical noise, which can act to mask or mimic planetary RV motions, represents the fundamental barrier to achieving this goal. For inactive stars …
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Thermal and Radiative Properties of Exoplanet Atmospheres Across the Mass Range
Observations of exoplanet atmospheres have flourished in recent years, revealing a remarkable diversity of thermal, chemical and dynamical conditions. In particular, thermal emission observations of such atmospheres provide unique insights into their temperature profiles, chemistry and energy …
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