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 17 of 17 for “"Synthetic Spectra"”.
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Chromatic homotopy theory in HF_p based synthetic spectra
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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A pipeline for the analysis of stellar spectra
… abundances by utilising measurements of spectral features in both observed and synthetic spectra. We take the observed spectra, synthetic spectra and line lists employed by the APOGEE survey and produce new values for the stellar parameters, CNO abundances and Al abundances of the APOGEE …
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A New Library of Stellar Model Atmospheres and Spectra
… upon. Libraries of model atmospheres and stellar spectra have been previously computed using ATLAS9 based upon the solar metallicity and chemical composition values calculated by Grevesse & Sauval (1998), used as the standard until Asplund et al. (2009) produced a new determination of the chemical …
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One and two photon absorption of atoms and ions
… interaction methods, were performed to generate synthetic spectra for comparison with experimental results.
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Interpretation of reflection seismic data by analysis of cumulative energy spectra
… of the reflectors is desirable. In this study, synthetic geologic models are generated to model thin-bed and velocity transition (constant velocity gradient) structures. These are transformed to displays of frequency vs. horizontal location vs. cumulative percent spectral energy. The spectra of …
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Seyfert and starburst activity in galaxies: Modeling and analysis
… model for starbursts based on empirical spectral library (R≈2000-3000) of HK spectra of 218 red stars, spanning a range of [Fe/H] from -2.2 to +0.3. We analyzed the behavior of 19 indices, and developed diagnostics for the stellar parameters. Finally, we incorporated the library into …
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Theoretical Studies of L-shell X-ray Line Polarization and M-shell X-ray Spectroscopic Emission from Highly Ionized Xenon Ions
… HED plasmas. Comparison of x-ray line emission spectra to non-local thermodynamic equilibrium (non-LTE) modeling and inclusion of non-thermal effects provides insights to laboratory-produced plasmas and underlying atomic processes. Xenon (Xe) radiation has been extensively studied for …
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High resolution spectropolarimetric diagnostics of weak, small-scale magnetic fields in the solar photosphere
… (MHD) simulation is used with SIR to produce synthetic observables in the same spectral window as observed by the GRIS-IFU. A parallelized wrapper to SIR is then used to perform nearly 14 million inversions of the synthetic spectra to test how well the ‘true’ MHD atmospheric parameters can be …
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Cosmological hydrodynamic simulations of the Lyman-alpha forest
… ($\Lambda$CDM) and the open CDM model (OCDM). Synthetic spectra along random lines-of-sight were generated and analyzed by using a powerful spectrum analysis method designed to mimic observational data reduction. The SCDM model was studied in great detail and found to be in excellent agreement …
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Characterisation of the Components in Cataclysmic Variables
… of the relationship between the physical and spectral components visible. It concentrates on the eclipsing dwarf nova OY Carinae, which has been observed both in superoutburst and quiescence. Optical 'wide B' band light curves were obtained at the end of the 1994 superoutburst and on the …
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Understanding the energy balance of TR structures observed by IRIS in non-equilibrium emission
… from the chromosphere to the corona. Thus, spectral emissions from the cool (< 1 MK) loop-like structures in this region are in need of extensive study and analysis. Because observations lack sufficient spatial resolution, this type of structure was called the “unresolved fine structure”, …
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Milankovitch-driven cyclicity and climate controlled dolomitization of a Late Triassic carbonate platform, Hungary
… up to sea-level in one precessional beat. Spectral analysis of the Hungarian carbonates was used to compare the amplitude spectra of different time series including lithology, gamma ray, self potential and neutron density. The spectra based on lithology were compared to synthetic spectra …
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Comprehensive Model of Jupiter's Polar Aurora
… ratio. I predict X-ray fluxes, efficiencies, and synthetic spectra for various initial ion energies considering opacity effects from two different atmospheres. The data is made available for quick X-ray calculations given an input ion flux. A calculation is given that demonstrates an in situ …
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Multi-spectrum retrieval of maps of Venus' surface emissivity in the infrared
… to improve knowledge of the planet’s geology. Spectrally resolved images of nightside emissions in the range 1.0-5.1 μm were recently acquired by the InfraRed Mapping channel of the Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS-M-IR) aboard ESA’s Venus EXpress (VEX). Surface and …
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Modeling of no radiative emission in non-equilibrium hypersonic flow
… the HET conditions for the HET case. absolute spectra radiance measurement from a shock tube is simulated, using 1D solutions from several DSMC chemistry sets. Normalized spectra in the 210 nm - 250 nm region are used to extract nonequilibrium temperature by fitting the measurements with …
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The Evolution of and Starburst-AGN Connection in Luminous and Ultraluminous Infrared Galaxies and their Link to Globular Cluster Formation
… abundance patterns. To this effort, I use SDSS spectra from Data Release 8 and 9 to estimate carbon (C) abundances for five GCs by matching synthetic spectra, created with TURBOSPECTRUM using atmospheric parameters derived from the Segue Stellar Parameter Pipeline, with observed spectra at the …