# Browse Dissertations and Theses - Astronomy by Title

• (1991)
The purpose of this thesis was to explore computationally the three dimensional hydrodynamics of extragalactic radio jets. This entailed putting together a large number of numerical tools before such simulations could be ...

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• (2012-02-01)
This thesis presents observations and modeling of nearby embedded sources in the earliest stage of protostellar evolution, i.e., Class 0 young stellar objects, using interferometric data of the Berkeley-Illinois-Maryland ...

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• (2010-01-06)
Physical properties of the three main structures in young stellar objects (YSOs), envelopes, bipolar outflows, and circumstellar disks, have been studied using radio interferometers: the Berkeley-Illinois-Maryland Association ...

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• (1996)
Glycine $\rm(NH\sb2CH\sb2COOH)$ is the smallest amino acid. Detecting interstellar glycine could shed light on the presolar nebular chemistry and its possible role in seeding newly formed planets with the building blocks ...

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• (2011-08-26)
A new class of wide-field, repeated-scan optical sky surveys, such as LSST, is coming online, and will map the sky in the time domain with unprecedented depth, completeness, and dynamic range. A main science goal of LSST ...

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• (1996)
Several three dimensional, multi-species, cosmological hydrodynamic simulations of the formation and evolution of Ly$\alpha$ forest absorbers were performed in three CDM-like cosmological models: the standard CDM model ...

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• (2012-06-27)
Two types of dust disks have been discovered around white dwarfs (WDs): small dust disks within the Roche limits of their WDs, and a large dust disk around the hot central WD of the Helix planetary nebula (PN), possibly ...

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• (1973)

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• (1991)
Observations of pulsar timing suggest that glitches and post-glitch behavior are due to variable coupling between the superfluid and normal components in neutron stars. A rotating superfluid is threaded by quantized vortex ...

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• (1968)

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• (1993)
In this thesis, I have studied the dynamics of the inflationary universe and the possible cosmological consequences of a series of phase transitions which the universe may have undergone. Specially, I have studied the ...

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• (2011-01-21)
In an era of precision cosmology, clusters of galaxies are the natural consequences under the hierarchical scenario, within which clusters directly encapsulate the history of structure formation. Thus, determining the mass ...

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• (1969)

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• (2014-01-16)
Throughout the entire lifetime of a star, it continuously alters the environment. Diverse processes are involved which complicates studies of stellar interaction. This thesis focuses on two different physical phenomena ...

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• (1981)
We have studied the evolution of 15, 30, and 40 M(,(CIRCLE)) stars with compositions Y = 0.28 and Z = 0.02, 0.01, 0.001 and 0.0002, and of 50 M(,(CIRCLE)) stars with Y = 0.28, Z = 0.0002. These models have been evolved ...

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• (2011-01-21)
This thesis presents an analysis of the largest catalog to date of infrared spectra of massive young stellar objects in the Large Magellanic Cloud. Evidenced by their very different spectral features, the luminous objects ...

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• (1985)
The evolution of planetary nebula nuclei (PNNs) is examined with the aid of the most recent available stellar evolution calculations and new observations of these objects. Their expected distribution in the log L-log T ...

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• (1968)

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• (1969)

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• (2013-08-22)
Type Ia supernovae (SNe~Ia) are thought to be caused by thermonuclear explosions of carbon-oxygen white dwarfs in close binary systems. However, the nature of the progenitor systems is still uncertain. In the single-degenerate ...

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