Physics
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..263c&link_type=abstract
NOAO Proposal ID #2000A-0263
Physics
Scientific paper
The evolution of the properties of galaxies as a function of redshift provides a sensitive probe of the theories of galaxy formation and evolution. At faint magnitudes, and thereby high redshift, the time required to undertake large spectroscopic surveys is prohibitive. Consequently existing spectroscopic surveys at z~ 1 sample only a small fraction of the Universe (i.e. they are subject to sample variance) and contain a few hundred redshifts (i.e. analyses are limited by shot noise). We can, however, alleviate these problems by using multicolor photometry to estimate the redshifts and spectral types of galaxies and thereby define narrow intervals in redshift over which to measure the statistical properties of galaxies. In so doing we can express the evolution of galaxies as a function of their physical properties (their redshifts, luminosities and spectral types). In a series of pilot studies we have demonstrated that we can measure the luminosity function, spectral type distribution and clustering of galaxies as a function of photometric-redshift. The limitation with our current data is that we cover only a small (and possibly biased) volume of the Universe. We, therefore, request time to apply these techniques to a statistically fair sample to provide the first definitive measure of galaxy evolution (the evolution of the luminosity function, clustering and distribution of galaxy spectral types as a function of photometric redshift). This proposal requests time to complete the spring fields of this survey that were started in May 1999.
Brunner Robert
Connolly Andrew
Davis Martin
Jain Bhuvnesh
Szalay Alex
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