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The direct analysis of spectra of type Ia supernovae.
(2000)
By using SYNOW, we show that most of the spectroscopic differences among type Ia supernovae can be explained by the temperature; therefore, the composition of most of the type Ia supernovae is essentially the same. In ...
A radio and x-ray search for intermediate-age supernovae: Tuning into the oldies.
(2001)
Type II supernovae (SNe) are the cataclysmic and very luminous last stage in the evolutionary track of very high mass stars, resulting in the destruction of the star and the ejection of large amounts of material into their ...
Bolometric Luminosities of Peculiar Type II-P Supernovae
(2018-08-02)
In this work, I analyze the bolometric luminosities of several peculiar Type II-P supernovae which are thought to originate from the same class of blue supergiant progenitor stars as the famous SN 1987A. This analysis is ...
PLANETARY REMNANTS AROUND WHITE DWARF STARS
(2015-05-08)
In this dissertation we present the results of four separate searches for infrared excess emission at white dwarf stars. Using spectra from the IRTF and photometry from PAIRITEL, MMT+SWIRC, Gemini+NIRI, and Spitzer+IRAC ...
Absolute-magnitude distributions and light curves of stripped-envelope supernovae.
(2004)
The absolute visual magnitudes of three Type IIb, 10 Type Ib and 13 Type Ic supernovae (collectively known as stripped-envelope supernovae) are studied by collecting data on the apparent magnitude, distance, and interstellar ...
A 2-D model for the O'Connell effect in W Ursae Majoris systems /
(1999)
The light curves of W Ursae Majoris stars often show asymmetries which are called the O'Connell Effect. Traditionally, these asymmetries were measured by calculating the magnitude difference of the peak intensity at each ...
The abundance and chemical evolution of nitrogen in spiral galaxies.
(1998)
The character of nitrogen processing in spiral galaxies is studied in this dissertation. Of particular interest are questions of how the (N/O) ratio changes over time as a result of perturbations of environmental parameters, ...
Abundances of sulfur in the Milky Way Disk from Peimbert Type II planetary nebulae.
(2000)
Sulfur abundance gradients and heavy element ratios for the Milky Way Disk are constructed based upon newly acquired spectrophotometry of Type II planetary nebulae (PN). These spectra extend from 3600--9600 angstroms ...
Constraining the composition and physics of active galactic nuclei with computer modeling.
(2007)
We present analysis from simultaneous FUSE, ASCA, and EUVE observations, as well as a reanalysis of archival HST spectra, from the extreme Narrow-line Seyfert 1 Galaxy RE 1034+39 (KUG 1031+398). RE 1034+39 has an unusually ...