Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rspta.296..355e&link_type=abstract
(Royal Society, Discussion on the Origin and Early Evolution of the Galaxies, London, England, Feb. 14, 15, 1979.) Royal Society
Astronomy and Astrophysics
Astronomy
16
Astronomical Photography, Galactic Evolution, Galactic Radiation, Photographic Plates, Angular Correlation, Astronomical Models, Red Shift, Schmidt Telescopes, Visual Observation
Scientific paper
With improved photographic techniques and fast plate-measuring machines, it is now possible to use deep photographic plates for statistical studies of faint galaxies. The evolutionary effects detectable with these samples are expected to be significant. Two such effects are currently being monitored by using P.D.S. and Cosmos scans of Schmidt and 4 m plates. First, number-magnitude counts are being used to constrain luminosity evolution, and secondly, correlation analyses of galaxy positions can be used to test physical models of galaxy clustering over large look-back times. The data can be reliably studied to magnitudes as faint as J equals about 24.5. Interpretation of the results is hampered by the poor knowledge of the intrinsic properties of normal galaxies.
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