2007/01/03 by R. C. Nichol, Nichol, Robert
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #Radio Astronomy Observations and Technology
paper · pdf · doi:10.48550/arxiv.astro-ph/0701073
openalex publication_date 2007/01/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The true nature of dark energy remains unclear: It is either a strange fluid in the Universe, with a negative effective pressure, or a breakdown in General Relativity on large scales. This question can only be answered through a suite of different observations as a function of redshift. In this paper, I will briefly review our attempts to achieve this goal using data from the Sloan Digital Sky Survey (SDSS). In particular, I will present new measurements of the Baryon Acoustic Oscillations (BAO) from the SDSS DR5 galaxy redshift survey as well as outline the on-going SDSSII Supernova Survey, which has already detected (in 2005-06) over 300 SN Ia's over the redshift range 0.05