8-13 September 2013
Asilomar, California
US/Pacific timezone

Angular and redshift issues for large galaxy surveys

10 Sep 2013, 14:40
20m
Asilomar, California

Asilomar, California

Asilomar Conference Grounds, 800 Asilomar Avenue, Pacific Grove, CA 93950-3704
Oral Cosmology Cosmology II

Speaker

Dr Carlos Cunha (Stanford University)

Description

Upcoming large area photometric surveys face many challenges. I will discuss two of the major issues: photometric redshifts and angular selection uncertainties. Because of the intrinsic inaccuracy of photo-z's, they cannot be used directly in cosmological analysis unless their uncertainties are precisely quantified. I will discuss recent results on spectroscopic follow-up requirements and strategies needed to characterize the photo-z error distributions as well as potential ways to alleviate the requirements. In the second part of my talk, I'll present a formalism for quantifying the requirements on our understanding of the angular selection of surveys for cosmological constraints I'll show examples of the bias in cosmological parameters due to errors in photometric calibration and dust extinction.

Primary author

Dr Carlos Cunha (Stanford University)

Presentation Materials

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