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NLTE synthetic spectra and light curves of type Ia supernovae.
(2000)
I have modeled the spectra of Type Ia supernovae with a detailed, non-local thermodynamic equilibrium (NLTE) model atmosphere and radiative transport code, PHOENIX. I have modeled spectra of the normal, Type Ia supernova, ...
Prospecting for elements: Galactic halo planetary nebulae abundances and Virgo spiral galaxy color profiles.
(1998)
Near-infrared Virgo cluster spiral colors. Near-infrared (NIR) surface photometry in J (1.2$\mu$m), H (1.6$\mu$m) and K (2.2$\mu$m) have been obtained for a sample of Virgo cluster spirals; NGC4321, NGC4303, NGC4571, ...
Non-local thermodynamic equilibrium spectrum synthesis of type Ia supernovae.
(1997)
This thesis is broken down into 4 major sections, each highlighting a different way with which to use spectrum synthesis to analyze SNe Ia. Chapters 2 and 3 look at normal SNe Ia and their potential use as distance indicators ...
Abundances in planetary nebulae: An autopsy of low and intermediate mass stars.
(1997)
In this work we report on the results of synthetic thermally pulsing asymptotic giant branch models (TP-AGB) and compare the results to the abundance ratios in a sample of planetary nebulae. We use updated the input ...
Hot Electrons and Radial Transport in Saturn’s Inner Magnetosphere: Modeling the Effects on Ion Chemistry
(2012)
The E-ring of Saturn, located just beyond the main rings at four Saturn radii, was known to be made mostly of water and its by-products before the Cassini spacecraft arrived at Saturn in 2005. Since then, Cassini has ...
Quantifying the Physics and Energetics of Iron Low-Ionization Broad Absorption-Line Quasar Outflows
(2022)
Quasars are among the most luminous and massive objects in the universe. They host an actively accreting supermassive black hole (SMBH) at their centre that can power energetic phenomena that outshine the host galaxy. A ...
Spectrum Formation at Late Times in Type Ia Supernovae
(2015-05-08)
I present a study of radiative transfer effects in type Ia supernovae ranging from 3-4 months to nearly 2 years post-maximum light. I explore several components of spectrum formation, beginning with a semi-analytic model ...
Non-LTE effects in supernova envelopes.
(1980)
The Sobolev method has been applied to the solution of the satistical rate equations for multi-level representations of singly ionized silicon and neutral hydrogen for various models of supernova envelopes. The physical ...
The Early Instability Scenario for Planet Formation in the Solar System
(2019-05-10)
The leading evolutionary model for the outer solar system, an orbital instability between the solar system’s giant planets, has been shown to greatly disturb the orbits of the young terrestrial planets. Undesirable outcomes ...
COSMOLOGY WITH TYPE IA SUPERNOVAE: ROBUST TECHNIQUES FOR DATA ANALYSIS AND PHOTOMETRIC CLASSIFICATION
(2017-05)
Since the accelerating expansion of the Universe was discovered by observing distant Type Ia supernovae (SNe Ia), SNe Ia have been playing an important role in constraining the unknown cause behind the observed cosmic ...