%0 Generic %1 busca2012baryon %A Busca, Nicolás G. %A Delubac, Timothée %A Rich, James %A Bailey, Stephen %A Font-Ribera, Andreu %A Kirkby, David %A Goff, J. M. Le %A Pieri, Matthew M. %A Slosar, Anze %A Aubourg, Éric %A Bautista, Julian E. %A Bizyaev, Dmitry %A Blomqvist, Michael %A Bolton, Adam S. %A Bovy, Jo %A Brewington, Howard %A Borde, Arnaud %A Brinkmann, J. %A Carithers, Bill %A Croft, Rupert A. C. %A Dawson, Kyle S. %A Ebelke, Garrett %A Eisenstein, Daniel J. %A Hamilton, Jean-Christophe %A Ho, Shirley %A Hogg, David W. %A Honscheid, Klaus %A Lee, Khee-Gan %A Lundgren, Britt %A Malanushenko, Elena %A Malanushenko, Viktor %A Margala, Daniel %A Maraston, Claudia %A Mehta, Kushal %A Miralda-Escudé, Jordi %A Myers, Adam D. %A Nichol, Robert C. %A Noterdaeme, Pasquier %A Olmstead, Matthew D. %A Oravetz, Daniel %A Palanque-Delabrouille, Nathalie %A Pan, Kaike %A Pâris, Isabelle %A Percival, Will J. %A Petitjean, Patrick %A Roe, N. A. %A Rollinde, Emmanuel %A Ross, Nicholas P. %A Rossi, Graziano %A Schlegel, David J. %A Schneider, Donald P. %A Shelden, Alaina %A Sheldon, Erin S. %A Simmons, Audrey %A Snedden, Stephanie %A Tinker, Jeremy L. %A Viel, Matteo %A Weaver, Benjamin A. %A Weinberg, David H. %A White, Martin %A Yèche, Christophe %A York, Donald G. %A Zhao, Gong-Bo %D 2012 %K acoustic baryonic forest lyalpha oscillation %T Baryon Acoustic Oscillations in the Ly-\alpha\ forest of BOSS quasars %U http://arxiv.org/abs/1211.2616 %X We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the Łya forest of high-redshift quasars. The study uses 48,640 quasars in the redshift range $2.1z 3.5$ from the Baryon Oscillation Spectroscopic Survey (BOSS) of the third generation of the Sloan Digital Sky Survey (SDSS-III). At a mean redshift $z=2.3$, we measure the monopole and quadrupole components of the correlation function for separations in the range $20\hMpc<r<200\hMpc$. A peak in the correlation function is seen at a separation equal to $(1.01\pm0.03)$ times the distance expected for the BAO peak within a concordance $Łambda$CDM cosmology. This first detection of the BAO peak at high redshift, when the universe was strongly matter dominated, results in constraints on the angular diameter distance $\da$ and the expansion rate $H$ at $z=2.3$ that, by themselves, require the existence of dark energy. Combined with constraints derived from Cosmic Microwave Background (CMB) observations, this result implies $H(z=2.3)=(224\pm8)km s^-1Mpc^-1$, indicating that the time derivative of the cosmological scale parameter $a=H(z=2.3)/(1+z)$ is significantly greater than that measured with BAO at $z\sim0.5$. This demonstrates that the expansion was decelerating in the range $0.7<z<2.3$, as expected from the matter domination during this epoch. Combined with measurements of $H_0$, one sees the pattern of deceleration followed by acceleration characteristic of a dark-energy dominated universe.

@misc{busca2012baryon, abstract = {We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the \Lya forest of high-redshift quasars. The study uses 48,640 quasars in the redshift range $2.1\le z \le 3.5$ from the Baryon Oscillation Spectroscopic Survey (BOSS) of the third generation of the Sloan Digital Sky Survey (SDSS-III). At a mean redshift $z=2.3$, we measure the monopole and quadrupole components of the correlation function for separations in the range $20\hMpc<r<200\hMpc$. A peak in the correlation function is seen at a separation equal to $(1.01\pm0.03)$ times the distance expected for the BAO peak within a concordance $\Lambda$CDM cosmology. This first detection of the BAO peak at high redshift, when the universe was strongly matter dominated, results in constraints on the angular diameter distance $\da$ and the expansion rate $H$ at $z=2.3$ that, by themselves, require the existence of dark energy. Combined with constraints derived from Cosmic Microwave Background (CMB) observations, this result implies $H(z=2.3)=(224\pm8){\rm km s^{-1}Mpc^{-1}}$, indicating that the time derivative of the cosmological scale parameter $\dot{a}=H(z=2.3)/(1+z)$ is significantly greater than that measured with BAO at $z\sim0.5$. This demonstrates that the expansion was decelerating in the range $0.7<z<2.3$, as expected from the matter domination during this epoch. Combined with measurements of $H_0$, one sees the pattern of deceleration followed by acceleration characteristic of a dark-energy dominated universe.}, added-at = {2012-11-13T15:35:47.000+0100}, author = {Busca, Nicolás G. and Delubac, Timothée and Rich, James and Bailey, Stephen and Font-Ribera, Andreu and Kirkby, David and Goff, J. M. Le and Pieri, Matthew M. and Slosar, Anze and Aubourg, Éric and Bautista, Julian E. and Bizyaev, Dmitry and Blomqvist, Michael and Bolton, Adam S. and Bovy, Jo and Brewington, Howard and Borde, Arnaud and Brinkmann, J. and Carithers, Bill and Croft, Rupert A. C. and Dawson, Kyle S. and Ebelke, Garrett and Eisenstein, Daniel J. and Hamilton, Jean-Christophe and Ho, Shirley and Hogg, David W. and Honscheid, Klaus and Lee, Khee-Gan and Lundgren, Britt and Malanushenko, Elena and Malanushenko, Viktor and Margala, Daniel and Maraston, Claudia and Mehta, Kushal and Miralda-Escudé, Jordi and Myers, Adam D. and Nichol, Robert C. and Noterdaeme, Pasquier and Olmstead, Matthew D. and Oravetz, Daniel and Palanque-Delabrouille, Nathalie and Pan, Kaike and Pâris, Isabelle and Percival, Will J. and Petitjean, Patrick and Roe, N. A. and Rollinde, Emmanuel and Ross, Nicholas P. and Rossi, Graziano and Schlegel, David J. and Schneider, Donald P. and Shelden, Alaina and Sheldon, Erin S. and Simmons, Audrey and Snedden, Stephanie and Tinker, Jeremy L. and Viel, Matteo and Weaver, Benjamin A. and Weinberg, David H. and White, Martin and Yèche, Christophe and York, Donald G. and Zhao, Gong-Bo}, biburl = {https://www.bibsonomy.org/bibtex/20740abfe0140620aa8b8bf85e1e31099/miki}, description = {[1211.2616] Baryon Acoustic Oscillations in the Ly-\alpha\ forest of BOSS quasars}, interhash = {69e0fc3c0173551cd54ac540bbdd6060}, intrahash = {0740abfe0140620aa8b8bf85e1e31099}, keywords = {acoustic baryonic forest lyalpha oscillation}, note = {cite arxiv:1211.2616Comment: submitted to Astronomy and Astrophysics}, timestamp = {2012-11-13T15:36:00.000+0100}, title = {Baryon Acoustic Oscillations in the Ly-\alpha\ forest of BOSS quasars}, url = {http://arxiv.org/abs/1211.2616}, year = 2012 }