Baryon Acoustic Oscillations and Dark Energy Bruce Bassett (AIMS/SAAO/UCT) Bruce Bassett (SAAO/UCT) BAO KITPC - March 2009 ArXiv:0910.5224 How far have we come since my first cosmology school? Bruce Bassett (SAAO/UCT) BAO SCP 96 High-z / SCP 98 Ω =0.94±0.31 Ω =0.28±0.10 Μ M (flat) (flat) Evolution of the Hubble Diagram 1996-2009 ESSENCE+SNLS Constitution 09 07 Ω =0.281±0.026 (+BAO) Ω =0.267±0.023 M M (flat) Filled by the SDSS SN survey THE CMB COBE 96 l C ) 1 + l ( L 2 10 100 1000 l COBE QMASK l C ) 1 + l ( L 2 10 100 1000 l COBE QMASK l BOOMERanG 00 C ) 1 + l ( L 2 10 100 1000 l COBE QMASK l BOOMERanG C MAXIMA ) 1 + l ( L 2 10 100 1000 l COBE QMASK l BOOMERanG C MAXIMA ) 1 CBI 03 + l ( L 2 10 100 1000 l Did not show COBE SPT QMASK ACT BICEP l BOOMERanG C TOCO MAXIMA ) ACBAR 1 CBI 03 VSA + SASKATOON l WMAP-5 ( ARCHEOPS L DASI PYTHON FIRS Tenerife OVRO SUZIE AMI 2 10 100 1000 ATCA l etc… Blake et al, 2011 All assumes w = -1 Riess et al, 1998