| DATE: |
2014-05-20 11:00 - 12:00 |
| PLACE: |
Kenkyu Honkan 1st floor meeting room 1 |
| TITLE: |
Neutrino mass constraint from robust cosmological signals in the BOSS DR11 galaxy clustering |
| CONTACT: |
Kohsaku Tobioka, tobioka-AT-post.kek.jp |
| SPEAKER: |
Dr. Shun Saito (Kavli IPMU ) |
| LANGUAGE: |
English |
| ABSTRACT: |
In this talk I will first give a brief highlight of ~1% measurement of the cosmological distance via Baryon Acoustic Oscillation (BAO) and ~10% measurement of the growth of large-scale structure via Redshift-Space Distortion (RSD) as fairly robust cosmological signals at z~0.5 from the updated data-relrease 11 (DR11) of Baryon Oscillation Spectroscopic Survey (BOSS). BOSS is part of Sloan Digital Sky Survey III (SDSS-III), and a gigantic cosmological survey aiming at mapping 1.5 million luminous galaxies and 200,000 quasars. BOSS DR11 contains almost million galaxies over 8,500 deg^2 which is currently the best 3-dimensional map of galaxies in the universe. I will describe how to efficiently measure BAO and RSD from such a huge dataset, and discuss how useful BAO and RSD are. In particular, I will focus on the neutrino mass constraint using BOSS BAO and RSD, and discuss how the neutrino mass can resolve discrepancies among cosmological datasets at early and at late time.
Refs. http://arxiv.org/abs/1312.4611 , http://arxiv.org/abs/1403.4599 |
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