• Nuclear star clusters in the Virgo Cluster of galaxies 

  Spengler, Chelsea (2018-11-23)

  It is readily accepted that many galaxies are inhabited by dense, compact objects deep in their centres, manifesting as supermassive black holes (SMBHs) and/or nuclear star clusters (NSCs). Their widespread presence and ...
• Near-infrared [Fe II] emission in starburst galaxies 

  Labrie, Kathleen (2018-11-16)

  We used the near-infrared [Fe II] emission line signature to detect supernova remnants (SNRs) in the nearby starburst galaxies NGC 1569, NGC 3738 and NGC 5253. The near-infrared narrow-band imaging program has led to the ...
• A measurement of the Tau to Muon branching ratio 

  Kormos, Laura Lee (2018-11-16)

  The Ƭ- → μ-vμvƬ branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B (Ƭ- → μ-vμvƬ) = 0.1734 ± 0.0009(stat) ± 0.0006(syst) has been ...
• The evolution of galaxies in the Hubble Deep Fields 

  Gwyn, Stephen Donald Jermy (2018-11-16)

  This thesis is a study of several aspects of the evolution of galaxies using photometric redshifts in the Hubble Deep Fields (HDF's). The photometric redshift method is used in the HDF's down to a magnitude limit of I = ...
• Search for excited charged leptons in electron-positron collisions 

  Vachon, Brigitte Marie Christine (2018-11-13)

  A search for evidence that fundamental particles are made of smaller subconstituents is performed. The existence of excited states of fundamental particles would be an unambiguous indication of their composite nature. ...
• Constraining variable accretion in deeply embedded protostars with interferometric observations 

  Francis, Logan (2018-11-02)

  Variability of pre-main-sequence stars observed at optical wavelengths has been attributed to fluctuations in the mass accretion rate from the circumstellar disk onto the forming star. Detailed models of accretion disks ...
• Dosimetry at extreme non-charged particle equilibrium conditions using Monte Carlo and specialized dosimeters 

  Alhakeem, Eyad Ali (2018-10-01)

  Radiotherapy is used in clinics to treat cancer with highly energetic ionizing particles. The radiation dose can be measured indirectly by means of radiation detectors or dosimeters. The dose deposited in a detector can ...
• The formation and survival of disk galaxies 

  Taylor, James E. (2018-09-21)

  The dynamical evolution of substructure within dark matter halos is of central importance in determining many aspects of galaxy formation and galaxy evolution in cold dark matter cosmologies. The overall sequence in which ...
• Self-interacting dark matter of an SU(2) gauged dark sector 

  Liu, Ruochuan (2018-09-04)

  This thesis investigates the possibility that the gauge boson in a certain hypothetical SU(2) gauged sector can constitute all the non-baryonic dark matter. The gauge bosons acquire mass from the Higgs mechanism as in the ...
• Applications of Raman spectroscopy in radiation oncology: clinical instrumentation and radiation response signatures in tissue 

  Van Nest, Samantha J (2018-08-31)

  Radiation therapy (RT) plays a crucial role in the management of cancer, however, current standards of care have yet to account for patient specific radiation sensitivity. Raman spectroscopy (RS) is a promising technique ...
• Understanding the liveliness and volatility of debris disks: from the microscopic properties to causal mechanisms. 

  Draper, Zachary Harrison (2018-08-30)

  Debris disks are a fundamental component of exoplanetary systems. Understanding their relationship with host stars and neighboring planets can help contextualize the evolution of exoplanetary systems. In order to further ...
• Precision determination of the electroweak mixing angle and test of neutral current universality from the tau polarization measurements at OPAL 

  Graham, Kevin (2018-08-16)

  Measurements of the Ƭ lepton polarization and forward-backward polarization asymmetry near the Z° resonance using the OPAL detector are described. The measurements are based on analyses of [special characters omitted] ...
• Techniques in high resolution observations from the ground and space, and imaging of the merging environments of radio galaxies at redshift 1 to 4 

  Steinbring, Eric (2018-08-03)

  High resolution imaging and spectroscopy are invaluable tools for extragalactic astronomy. Galaxies with redshifts of 1 or more subtend a very small angle on the sky—typically, only about an arcsecond. Unfortunately, this ...
• A study of turbulence and fine scale temperature variability of the ocean thermal boundary layer under breaking surface waves 

  Gemmrich, Johannes Richard (2018-08-02)

  Although turbulence near the ocean surface is of great significance to the air-sea exchange of heat, gas and momentum it is a poorly understood phenomenon especially at high wind speeds when vertical transfer processes ...
• Star formation in Camelopardalis: Cam OB1 

  Lyder, David Anthony (2018-07-25)

  Star formation in the Cam OB1 region is investigated. Star formation, in general, is considered in terms of three elements: a) the structural relationship between the parent molecular clouds and newly formed stars, b) ...
• The internal kinematics of intermediate redshift galaxies 

  Simard, Luc (2018-07-19)

  A dilemma is posed by studies of galaxy evolution at intermediate redshifts. If evolutionary effects are neglected, simple models predict number densities of faint galaxies which are 2—5x lower than observed at z ≅ 0.4. ...
• Optical and near-infrared photometry of old galactic clusters 

  Rosvick, Joanne Marie (2018-07-18)

  The open clusters NGC 2141, NGC 6791, NGC 6819 and NGC 7142, all suspected of having ages greater than 2 billion years (Gyr), were observed at optical and near-infrared wavelengths. The images were reduced using standard ...
• A study of high quality, near-infrared spectra of eight spectral type of K stars: precise radial velocities, chromospheric emission, and fundamental stellar parameters 

  Larson, Ana Marie (2018-07-17)

  We examine the precise radial velocities and chromospheric emission and derive the fundamental parameters of eight K stars - 36 Ophiuchi A, B (K0 V, K1 V), 61 Cygni A, B (K5 V, K7 V), β Geminorum (K0 IIIb ), δ ...
• The faint end of the luminosity function in clusters of galaxies 

  De Propris, Roberto (2018-07-13)

  We have determined luminosity functions, surface density distributions and color distributions for galaxies in eight clusters of galaxies at moderate redshift (z ~ 0.02) observed at the CFHT. 1) In the inner 2' of four ...
• Three-dimensional numerical modelling of geo-electromagnetic induction phenomena 

  Pu, Xing-Hua (2018-07-11)

  A finite difference algorithm for solving the forward modelling problem of geo-electromagnetic induction in three-dimensional structures has been developed in this thesis. Novel features of the method include the incorporation ...

View more