Risa Wechsler - Astronomy and Astrophysics
Risa Wechsler - Astronomy and Astrophysics
Risa Wechsler - Astronomy and Astrophysics
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the recipe<br />
1. populate the simulation with a given luminosity function. was<br />
using SDSS r-b<strong>and</strong> LF with 1.6mag evolution per unit redshift.<br />
(switch to 1.3mag per unit z?)<br />
2. luminosity dependent bias: assign galaxies to dark matter particles<br />
based on the local dark matter galaxy distribution by tuning P<br />
(δ dm |Mr) to match the observed luminosity dependent 2-pt.<br />
correlation function<br />
3. each mock galaxy gets assigned a real SDSS galaxies, based on<br />
its luminosity <strong>and</strong> local galaxy<br />
measure the 5th/10th nearest neighbor galaxy for a volume<br />
limited sample. for 0.4L* (Mr = -19.78), this is ~z=0.05-0.1.<br />
measure this same density estimator for each of the mock<br />
galaxies<br />
bin galaxies in L <strong>and</strong> dg, choose a real galaxy from the<br />
appropriate bin<br />
4. apply simple target selection algorithm, main + LRGs
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