Browsing Department of Physics, Engineering Physics and Astronomy Graduate Theses by Author "Widrow, Lawrence M."
Now showing items 16 of 6

A Bayesian/MCMC Approach to Galaxy Modelling: NGC 6503
Puglielli, David (20100111)We use Bayesian statistics and Markov chain Monte Carlo (MCMC) techniques to construct dynamical models for the spiral galaxy NGC 6503. The constraints include surface brightness profiles which display a Freeman Type II ... 
Dynamic MadeToMeasure: A Method of Making Dynamically SelfConsistent Triaxial Dark Matter Halos
Deg, Nathan (20100414)In this thesis we modify the MadeToMeasure (M2M) algorithm to be dynamically selfconsistent and apply it to the problem of generating equilibrium collisionless systems with nonspherical halos. Our M2M algorithm ... 
A Fully SelfConsistent Constraint on the Mass of M31 and the Local Group
ForemanMacKey, Daniel (20100827)We present the first fully selfconsistent, axisymmetric, dynamical model of the Andromeda galaxy (M31). We constrain the physical parameters of the model with datasets on all radial scales: the bulge projected velocity ... 
Measuring the Mass of a Galaxy: An evaluation of the performance of Bayesian mass estimates using statistical simulation
Eadie, Gwendolyn (20130327)This research uses a Bayesian approach to study the biases that may occur when kinematic data is used to estimate the mass of a galaxy. Data is simulated from the Hernquist (1990) distribution functions (DFs) for velocity ... 
The Methodology of Modelling the Milky Way with Stellar Streams
Deg, Nathan (20141001)In this thesis we examine the methodology of modelling the Milky Way using stellar streams. Using the orbitfitting method we show that combining constraints from the Sagittarius stream with a suite of other photometric ... 
Simulations of ScaleFree Cosmologies for the SmallScale Cold Dark Matter Universe
Elahi, Pascal (20090926)Cosmological simulations show that dark matter halos contain a wealth of substructure. These subhalos are assumed have a mass distribution that extends down to the smallest mass in the Cold Dark Matter (CDM) hierarchy, ...