Browsing Physics, Engineering Physics and Astronomy, Department of by Author "Hanes, David"
Now showing items 1-11 of 11
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Characterization of the Galactic White Dwarf Population in the Next Generation Virgo Cluster Survey
Fantin, Nicholas (2016-08-08)Halo white dwarfs remain one of the least studied stellar populations in the Milky Way because of their faint luminosities. Recent work has uncovered a population of hot white dwarfs which are thought to be remnants of ... -
A detailed observational analysis of magnetism in three B and O stars observed within the context of the MiMeS project
Grunhut, Jason (2012-09-28)The detailed observational analysis of three massive B- and O-type stars was carried out in this study in order to characterize their fundamental, magnetic, and variability properties. The bulk of the data acquired were ... -
A Fully Self-Consistent Constraint on the Mass of M31 and the Local Group
Foreman-MacKey, Daniel (2010-08-27)We present the first fully self-consistent, 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 ... -
The Globular Cluster Kinematics and Dark Matter Content of NGC 4649
Campbell, Ainsley (2011-10-12)The globular cluster system (GCS) of the elliptical galaxy NGC 4649 has been examined using the Gemini Multi-Object Spectrograph (GMOS); spectra for 156 candidate globular clusters (GCs) were obtained, extending to a ... -
Globular Cluster Kinematics and Dark Matter Content of the Isolated Elliptical NGC 720
Schembri, M. Amanda (2011-02-03)We examine the globular cluster system (GCS) of the isolated elliptical NGC 720 using the Gemini Multi-Object Spectrograph (GMOS) and have obtained spectra for 241 candidate globular clusters (GCs) extending to a galactocentric ... -
Magnetic fields and the variable wind of the early-type supergiant β Ori
Shultz, Matthew Eric (2012-04-30)Supergiant stars of spectral types B and A are characterized by variable and structured winds, as revealed by variability of optical and ultraviolet spectral lines. Non- radial pulsations and magnetically supported loops ... -
The Magnetic Fields of Ap Stars From High Resolution Stokes IQUV Spectropolarimetry
Silvester, James (2014-05-28)In this thesis we describe the acquisition of high resolution time resolved spectropolarimetric observations of 7 (bright and well understood) Ap stars in Stokes IQUV using the ESPaDOnS and Narval spectropolarimeters at ... -
Magnetic, chemical and rotational properties of the Herbig Ae/Be binary system HD 72106
Folsom, Colin Peter (2007-09-17)Recently, magnetic fields have been detected in a handful of pre-main sequence Herbig Ae and Be (HAeBe) stars. This hints at an evolutionary connection between magnetic HAeBe stars and Ap and Bp stars. Ap/Bp stars are ... -
Physical properties of a complete volume-limited sample of Ap/Bp stars: Magnetic. rotational, multiplicity, and evolutionary properties of magnetic intermediate-mass stars within 100 pc of the sun
Power, Jennifer (2007-09-27)The population of all magnetic chemically peculiar stars (Ap stars) within 100 parsecs of the sun has been identified and investigated, determining fundamental parameters, rotational properties, and magnetic field ... -
The Rotational Evolution and Magnetospheric Emission of the Magnetic Early B-type Stars
Shultz, Matthew (2016-08-05)How do the magnetic fields of massive stars evolve over time? Are their gyrochronological ages consistent with ages inferred from evolutionary tracks? Why do most stars predicted to host Centrifugal Magnetospheres (CMs) ... -
Using High-Resolution Spectroscopy To Improve The Determination Of Effective Temperatures OF Pre-Main Sequence Stars
Grunhut, Jason (2009-02-17)Herbig Ae/Be (HAeBe) stars are the pre-main sequence progenitors of main sequence A and B stars, and are characterized observationally by strong emission in spectral lines and significant infra-red excess that results from ...