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Browsing by Subject "Galaxies"

Browsing by Subject "Galaxies"

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  • Ouellette, John Anders (2018-01-17)
    Blue stragglers are enigmatic stars which appear to have undergone some form of rejuvenation, bringing them near the zero-age main sequence of the cluster in which they reside. The most likely explanation for the existence ...
  • Patton, David Robert (2017-11-27)
    New techniques are developed for relating the statistics of close galaxy pairs to the galaxy merger and accretion rates. Unlike the traditional pair fraction approach, these methods are shown to be robust to a number of ...
  • Bottrell, Connor (2016-08-24)
    The current generation of cosmological hydrodynamical simulations offer new levels of fidelity in galaxy formation and evolution that can be benchmarked against observations. However, it is crucial that the comparison ...
  • 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 = ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • Balogh, Michael Lajos (2017-11-23)
    We have measured spectral indices for ~ 2000 galaxies in the CNOC1 redshift survey of 15 X-ray luminous clusters at 0.2 < ≈ < 0.55. A detailed comparison is made between the star formation histories of galaxies in these ...
  • Ghazvini Zadeh, Aida (2010-04-12)
    Clusters of galaxies are the largest and most massive gravitationally bound objects in the universe. They contain several hundreds to thousands of galaxies orbiting in the gravitational potential well of the cluster. The ...
  • Ludlow, Aaron D. (2009-01-04)
    We study the structure and substructure of Lambda-CDM halos using a suite of high-resolution cosmological N-body simulations. Our analysis of the substructure population of dark matter halos focuses on their mass and peak ...