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Awarded the American Astronomical Society (AAS) Rodger Doxsey
Travel Prize, and with a foreword by thesis supervisor Professor
Shardha Jogee at the University of Texas at Austin, this thesis
discusses one of the primary outstanding problems in extragalactic
astronomy: how galaxies form and evolve. Galaxies consist of two
fundamental kinds of structure: rotationally supported disks and
spheroidal/triaxial structures supported by random stellar motions.
Understanding the balance between these galaxy components is vital
to comprehending the relative importance of the different
mechanisms (galaxy collisions, gas accretion and internal secular
processes) that assemble and shape galaxies. Using panchromatic
imaging from some of the largest and deepest space-based galaxy
surveys, an empirical census of galaxy structure is made for
galaxies at different cosmic epochs and in environments spanning
low to extremely high galaxy number densities. An important result
of this work is that disk structures are far more prevalent in
massive galaxies than previously thought. The associated challenges
raised for contemporary theoretical models of galaxy formation are
discussed. The method of galaxy structural decomposition is treated
thoroughly since it is relevant for future studies of galaxy
structure using next-generation facilities, like the James Webb
Space Telescope and the ground-based Giant Magellan Telescope with
adaptive optics.
Awarded the American Astronomical Society (AAS) Rodger Doxsey
Travel Prize, and with a foreword by thesis supervisor Professor
Shardha Jogee at the University of Texas at Austin, this thesis
discusses one of the primary outstanding problems in extragalactic
astronomy: how galaxies form and evolve. Galaxies consist of two
fundamental kinds of structure: rotationally supported disks and
spheroidal/triaxial structures supported by random stellar motions.
Understanding the balance between these galaxy components is vital
to comprehending the relative importance of the different
mechanisms (galaxy collisions, gas accretion and internal secular
processes) that assemble and shape galaxies. Using panchromatic
imaging from some of the largest and deepest space-based galaxy
surveys, an empirical census of galaxy structure is made for
galaxies at different cosmic epochs and in environments spanning
low to extremely high galaxy number densities. An important result
of this work is that disk structures are far more prevalent in
massive galaxies than previously thought. The associated challenges
raised for contemporary theoretical models of galaxy formation are
discussed. The method of galaxy structural decomposition is treated
thoroughly since it is relevant for future studies of galaxy
structure using next-generation facilities, like the James Webb
Space Telescope and the ground-based Giant Magellan Telescope with
adaptive optics.
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