Subject: LSST can measure the neutrino mass

From: Michael Strauss

Submitted: Thu, 3 Jul 2003 08:54:43 -0400 (EDT)

Message number: 135 (previous: 134, next: 136 up: Index)

John,
  I believe you are assuming that we have redshifts for all the
galaxies in the LSST sample.  We will definitely have photometric
(but not spectroscopic) redshifts; it will be very interesting to ask
what sort of precision is needed in the photo-z's to do this
calculation.  A rather optimistic number is 3% accuracy in (1+z).  And
you will need to worry about:
  -Non-linearity in the redshift-distance relation;
  -Non-linear clustering
  -Evolution in the galaxy population, and in the bias relative to the DM
  -Evolution in the clustering of the dark matter
  -Effects of peculiar velocities, both linear and non-linear, and
     evolution thereof. 
  -The luminosity and type dependence of galaxy bias.

				      -Michael Strauss

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