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arXiv · 1202.6057

The clustering of galaxies at z~0.5 in the SDSS-III Data Release 9 BOSS-CMASS sample: a test for the LCDM cosmology

Sebastian E. Nuza·Ariel G. Sanchez·Francisco Prada·Anatoly Klypin·David J. Schlegel·Stefan Gottloeber·Antonio D. Montero-Dorta·Marc Manera·Cameron K. McBride·Ashley J. Ross·Raul Angulo·Michael Blanton·Adam Bolton·Ginevra Favole·Lado Samushia·Francesco Montesano·Will J. Percival·Nikhil Padmanabhan·Matthias Steinmetz·Jeremy Tinker·Ramin Skibba·Donald P. Schneider·Hong Guo·Idit Zehavi·Zheng Zheng·Dmitry Bizyaev·Olena Malanushenko·Viktor Malanushenko·Audrey E. Oravetz·Daniel J. Oravetz·Alaina C. Shelden
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Abstract

We present results on the clustering of 282,068 galaxies in the Baryon Oscillation Spectroscopic Survey (BOSS) sample of massive galaxies with redshifts 0.4 ~10%) in the correlation functions for scales less than ~1 Mpc/h and ~10-40 Mpc/h. A more realistic abundance matching model and better statistics from upcoming observations are needed to clarify the situation. We also estimate that about 12% of the "galaxies" in the abundance-matched sample are satellites inhabiting central haloes with mass M>~1e14 M_sun/h. Using the MultiDark simulation we also study the real space halo bias b(r) of the matched catalogue finding that b=2.00+/-0.07 at large scales, consistent with the one obtained using the measured BOSS projected correlation function. Furthermore, the linear large-scale bias depends on the number density n of the abundance-matched sample as b=-0.048-(0.594+/-0.02)*log(n/(h/Mpc)^3). Extrapolating these results to BAO scales we measure a scale-dependent damping of the acoustic signal produced by non-linear evolution that leads to ~2-4% dips at ~3 sigma level for wavenumbers k>~0.1 h/Mpc in the linear large-scale bias.

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Sebastian E. Nuza, Ariel G. Sanchez, Francisco Prada, Anatoly Klypin, David J. Schlegel, Stefan Gottloeber, Antonio D. Montero-Dorta, Marc Manera, Cameron K. McBride, Ashley J. Ross, Raul Angulo, Michael Blanton, Adam Bolton, Ginevra Favole, Lado Samushia, Francesco Montesano, Will J. Percival, Nikhil Padmanabhan, Matthias Steinmetz, Jeremy Tinker, Ramin Skibba, Donald P. Schneider, Hong Guo, Idit Zehavi, Zheng Zheng, Dmitry Bizyaev, Olena Malanushenko, Viktor Malanushenko, Audrey E. Oravetz, Daniel J. Oravetz, Alaina C. Shelden. 2012-02-27. The clustering of galaxies at z~0.5 in the SDSS-III Data Release 9 BOSS-CMASS sample: a test for the LCDM cosmology. https://doi.org/10.1093/mnras/stt513

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