Other
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........13k&link_type=abstract
Ph.D. Thesis California Univ., Berkeley.
Other
101
Astronomical Photometry, Galaxies, Luminous Intensity, Spectral Energy Distribution, Galactic Evolution, Galactic Radiation, Red Shift, Stellar Luminosity
Scientific paper
Techniques are described for the automatic measurement of the colors and magnitudes of a complete sample of very faint galaxies. The observations consist of photographic surface photometry in two wavebands for approximately 20000 galaxies in two widely separated, high-altitude fields, each having an area of approximately 1080 square arc minutes. The photometric zero points are derived directly from faint stars in the same fields measured photoelectrically by other observers. The photometry of the galaxy sample is complete to a limit about ten times fainter than has been systematically investigated before. Results are interpreted with a simple model incorporating envolving spectral energy distributions for different types of galaxies.
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