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Probing Primordial Non-Gaussianity with Large-Scale Structure
Roman Scoccimarro, Emiliano Sefusatti, Matias Zaldarriaga
We consider primordial non-Gaussianity due to quadratic corrections in the gravitational potential parametrized by a non-linear coupling parameter fnl. We study constraints on fnl…
The 3D power spectrum of galaxies from the SDSS
M Tegmark, M Blanton, M Strauss +32
We measure the large-scale real-space power spectrum P(k) using a sample of 205,443 galaxies from the Sloan Digital Sky Survey, covering 2417 square degrees with mean redshift z~0.…
Differentiating between Modified Gravity and Dark Energy
Arthur Lue, Roman Scoccimarro, Glenn Starkman
The nature of the fuel that drives today's cosmic acceleration is an open and tantalizing mystery. We entertain the suggestion that the acceleration is not the manifestation of yet…
On Departures From a Power Law in the Galaxy Correlation Function
Idit Zehavi, David H. Weinberg, Zheng Zheng +7
We measure the projected correlation function w_p(r_p) from the Sloan Digital Sky Survey for a flux-limited sample of 118,000 galaxies and for a volume limited subset of 22,000 gal…