Thursday, June 16, 2011, 3:00 pm — Small Seminar Room, Bldg. 510
In 1997, Schramm and Turner titled their paper as "Big-Bang
Nucleosynthesis enters the Precision Era" and rang the bell of the arrival of precision cosmology. After a decade of discovery of dark energy, type Ia supernova data alone requires the cosmic acceleration at > 99.999% confidence level, and Supernova Cosmology Project reports
Omega_Lambda = 0.729 +/- 0.014 (68% CL including systematic error for LCDM) and the equation of state parameter w=-1.013 +0.068-0.073 (for wCDM) from our Hubble Space Telescope Cluster Supernova Survey (arXiv1105.3470).
Now, we are facing challenges to reduce the systematic error which becomes comparable or larger than statistical errors. One of the origins is the diversity of type Ia supernova and I will discuss how we attack the problem with Principal Component Analysis (PCA) and it's other applications including Quasar analysis. And I will present the forecast of dark energy precision in the next 5 years.
Hosted by: Anze Slosar
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