Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phdt........41m&link_type=abstract
PhD Dissertation, Massachusetts Inst. of Tech. Cambridge, MA United States
Astronomy and Astrophysics
Astronomy
52
Andromeda Galaxy, Milky Way Galaxy, Galactic Structure, Local Group (Astronomy), Galactic Evolution, Cosmology, Supernova Remnants, Globular Clusters, O Stars, B Stars, X Ray Binaries, H Ii Regions
Scientific paper
The study of external galaxies is crucial to the understanding of our own Galaxy. Our position inside the Milky Way severely biases our observations at optical and X-ray wavelengths due to the extreme absorption due to the dust in the plane of our Galaxy. The difficulty of determining the distance to various classes of objects makes global comparisons of quantities such as size and luminosity difficult or biased. These problems are removed or reduced for studies of external galaxies. I have performed several large optical surveys of the Andromeda Galaxy (M31), and have combined these with X-ray observations performed by my collaborators at the Max-Planck-Institut fur Extraterrestriche Physik (MPE). These datasets allow for the global study of various classes of objects in M31: Globular Clusters; OB associations, Supernova Remnants; Massive X-ray Binaries, H II regions, and many more. In this thesis, I demonstrate that a global, multi-wavelength study of M31 provides a more detailed understanding of these various populations, and highlights many of the similarities and differences between M31 and the Milky Way.
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