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 31 for “"Jwst"”.
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Exoplanetary Atmospheric Retrievals with Transit Spectroscopy in the JWST Era
… of life. The James Webb Space Telescope (JWST) has already led to the first of likely many breakthroughs with novel chemical detections. These expected advances in exoplanetary science in the JWST era necessitate atmospheric retrieval techniques to evolve to take full advantage of JWST …
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New insights into primeval galaxies in the era of JWST
… z>7 galaxies, the James Webb Space Telescope (JWST) has revolutionised the field. The sensitivity of the near infrared camera (NIRCam) and spectrograph (NIRSpec) instruments have facilitated the detection and spectroscopic confirmation of galaxies out to z∼14. Moreover, the study of the …
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Unveiling gravitationally lensed, high-redshift dusty star forming galaxies with JWST
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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The Active Phases of a Galaxy in the JWST and Euclid Era: From Radio Jets and Multiphase Outflows to Mergers
… (ULIRGs), Arp 220 and Mrk231, observed with JWST/NIRSpec. We spatially resolved the ionized and hot molecular gas in the nuclear region and identified multiple high-velocity multiphase outflows originating from both nuclei of Arp220. Combined NIRSpec and ALMA observations reveal that most of …
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New Advances in Exoplanet Spectroscopy from Space and Ground
… of exoplanets. The James Webb Space Telescope (JWST) is delivering unprecedented atmospheric observations with unmatched precision and wavelength coverage in the infrared, while large ground-based telescopes are facilitating high-resolution spectroscopy in the optical and near-infrared. This …
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Lyα emission as a sensitive probe of galactic mergers and reionization
… Our simulations successfully reproduce several JWST observations with the assumption of minimal interstellar dust content. • How can we interpret the detection of a LAE at z ∼ 13? We identify two critical factors influencing the detectability of such early galaxies: (1) how far the red wing in …
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Star-forming Galaxies and Quenched Systems throughout Cosmic Time
… filter set represented (prior to the launch of *JWST*) the best sampling of high-redshift galaxy SEDs out to z > 3, I show that measurements of the main sequence to low masses and high redshifts were still strongly dependent on the priors employed in SED fitting (as well as other fitting …
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STRONG GRAVITATIONAL LENSING MODELLING OF GALAXY CLUSTERS IN THE ERA OF BIG DATA
… Complementarily, the James Webb Space Telescope (JWST) is providing extremely deep and high-resolution observations, revealing a number of multiple images and substructures greater than previously unknown, and thus enabling lens models of unprecedented accuracy. The synergy between these …
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Modeling and Observing Atmospheres of Terrestrial Exoplanets
… recent launch of the James Webb Space Telescope (JWST) allows us to observe more exoplanets and in greater detail. Now that we can characterize terrestrial planets and their atmospheres, this dissertation features several theoretical works that study atmospheric dynamics and infer observability. …
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Investigating the Characteristics of Exoplanetary Atmospheres and Interiors
… I apply this retrieval framework to simulated JWST observations of hot Jupiter transmission spectra, obtaining accurate estimates of the day-night temperature variation across the terminator as well as the abundances of chemical species. I demonstrate an example of a model hot Jupiter …
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Thermal and Radiative Properties of Exoplanet Atmospheres Across the Mass Range
… emission with the James Webb Space Telescope (JWST) can place useful constraints on the habitability of temperate mini-Neptunes such as K2-18 b. These results underpin the potential of temperate mini-Neptunes such as K2-18 b as promising candidates in the search for habitable exoplanets. …
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Isotopes as a Tool for Exploring Exoplanet Atmospheres
… world will likely remain out of reach in the JWST era. Due to their size and ability to retain large scale height, H₂-dominated atmospheres, sub-Neptunes are relatively easier to study using transmission spectroscopy compared with terrestrial planets. I simulated observations of CO₂ …
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Regulating and Quenching Star Formation in Galaxies across the Cosmic Epochs
… data from the James Webb Space Telescope (JWST), I identify an extremely rapidly “(mini-)quenched” galaxy at redshift z=7.3, when the universe was only 700 million years old. Its star-formation history (SFH) consists of a short and intense burst terminating only 10-40 million years before …
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Hunting Supermassive Black Holes in the Early Universe
… Telescope (HST) and James Webb Space Telescope (JWST) data. We identify 44 variable AGNs at 4<z<7, and derive the AGN luminosity function which show elevated abundance compared with other conventional AGN/quasar selection. Assuming AGN variability is a ubiquitous properties of accreting SMBH, we …
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Insights into the nature of dust attenuation in relation to galaxy evolution from local to cosmic noon galaxies
… these epochs. Then, we present work using JWST/NIRCam photometry and JWST/NIRSpec spectroscopy of a sample of massive quiescent and star-forming galaxies observed at cosmic noon with the Blue Jay collaboration. We study the shape of the attenuation law and show that there is a large …
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Exoplanet Atmospheric Characterization using High-Precision Photometry
… use of observations by HST, TESS, CHEOPS, JWST, and PLATO. It is demonstrated that the atmospheric effects are best measurable for exoplanets around later spectral types. In addition to that, I present an original exploration of the possibility of extracting out spectral features within …
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Internal Structures in the Sub-Neptune Regime
… observed with the James Webb Space Telescope (JWST). Lastly, I use the internal structure model to conduct a detailed exploration of the possible interior and surface conditions of TOI-270 d, a temperate sub-Neptune recently observed with JWST. This investigation, informed by the findings of …
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SPECTROSCOPIC STUDY OF ICES WITH ASTROPHYSICAL INTEREST
… the data of the James Webb Space Telescope (JWST) that is scheduled to be launched in 2021. The experimental data presented in Chapters 3, 4, and 5 fill the void of the experimental data on CH4 ice to successfully interpret the remote sensing data obtained from spacecraft and ground-based …
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Formation of the first galaxies under stellar feedback
… with the upcoming James Webb Space Telescope (JWST).
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The Structure of Extrasolar Planetesimal Belts in Images
… interpreting upcoming observations with ALMA, JWST and the next generation of observatories at high sensitivity and resolution.
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