Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21533805q&link_type=abstract
American Astronomical Society, AAS Meeting #215, #338.05; Bulletin of the American Astronomical Society, Vol. 42, p.442
Astronomy and Astrophysics
Astronomy
Scientific paper
It has long been known that galaxies with little or no ongoing star formation (SF) occur primarily in dense environments at z 0. But when did these galaxies form their stars? This question has prompted significant research over the years, including direct measurements of the evolution of the SF-density relation. Density measurements at z 0 and beyond benefit significantly from spectroscopic redshifts, however various selection effects in spectroscopic samples can pose serious difficulties. Some studies rely on photometric redshifts, but in this case the redshift errors are large and must be well-understood in order to obtain robust results. Here I present a novel technique to deal with photometric redshift errors in redshift surveys, and as a first application I use it to derive new constraints on the evolution of the SF-density relation to z 2.
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