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Title: Baryon acoustic oscillations in the Ly α forest of BOSS quasars

In this paper, we report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the Lyα 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 h -1 Mpc < r < 200 h -1. 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 D A and the expansion rate $H$ at $z=2.3$ that, combined with priors on $$H_0$$ and the baryon density, 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. Finally, combined with measurements of H 0, one sees the pattern of deceleration followed by acceleration characteristic of a dark-energy dominated universe.
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Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 552; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
BOSS Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmology: observations; dark energy; large-scale structure of Universe; cosmological parameters
OSTI Identifier:
1407184

Busca, N. G., Delubac, T., Rich, J., Bailey, S., Font-Ribera, A., Kirkby, D., Le Goff, J. -M., Pieri, M. M., Slosar, A., Aubourg, É., Bautista, J. E., Bizyaev, D., Blomqvist, M., Bolton, A. S., Bovy, J., Brewington, H., Borde, A., Brinkmann, J., Carithers, B., Croft, R. A. C., Dawson, K. S., Ebelke, G., Eisenstein, D. J., Hamilton, J. -C., Ho, S., Hogg, D. W., Honscheid, K., Lee, K. -G., Lundgren, B., Malanushenko, E., Malanushenko, V., Margala, D., Maraston, C., Mehta, K., Miralda-Escudé, J., Myers, A. D., Nichol, R. C., Noterdaeme, P., Olmstead, M. D., Oravetz, D., Palanque-Delabrouille, N., Pan, K., Pâris, I., Percival, W. J., Petitjean, P., Roe, N. A., Rollinde, E., Ross, N. P., Rossi, G., Schlegel, D. J., Schneider, D. P., Shelden, A., Sheldon, E. S., Simmons, A., Snedden, S., Tinker, J. L., Viel, M., Weaver, B. A., Weinberg, D. H., White, M., Yèche, C., and York, D. G.. Baryon acoustic oscillations in the Lyα forest of BOSS quasars. United States: N. p., Web. doi:10.1051/0004-6361/201220724.
Busca, N. G., Delubac, T., Rich, J., Bailey, S., Font-Ribera, A., Kirkby, D., Le Goff, J. -M., Pieri, M. M., Slosar, A., Aubourg, É., Bautista, J. E., Bizyaev, D., Blomqvist, M., Bolton, A. S., Bovy, J., Brewington, H., Borde, A., Brinkmann, J., Carithers, B., Croft, R. A. C., Dawson, K. S., Ebelke, G., Eisenstein, D. J., Hamilton, J. -C., Ho, S., Hogg, D. W., Honscheid, K., Lee, K. -G., Lundgren, B., Malanushenko, E., Malanushenko, V., Margala, D., Maraston, C., Mehta, K., Miralda-Escudé, J., Myers, A. D., Nichol, R. C., Noterdaeme, P., Olmstead, M. D., Oravetz, D., Palanque-Delabrouille, N., Pan, K., Pâris, I., Percival, W. J., Petitjean, P., Roe, N. A., Rollinde, E., Ross, N. P., Rossi, G., Schlegel, D. J., Schneider, D. P., Shelden, A., Sheldon, E. S., Simmons, A., Snedden, S., Tinker, J. L., Viel, M., Weaver, B. A., Weinberg, D. H., White, M., Yèche, C., & York, D. G.. Baryon acoustic oscillations in the Lyα forest of BOSS quasars. United States. doi:10.1051/0004-6361/201220724.
Busca, N. G., Delubac, T., Rich, J., Bailey, S., Font-Ribera, A., Kirkby, D., Le Goff, J. -M., Pieri, M. M., Slosar, A., Aubourg, É., Bautista, J. E., Bizyaev, D., Blomqvist, M., Bolton, A. S., Bovy, J., Brewington, H., Borde, A., Brinkmann, J., Carithers, B., Croft, R. A. C., Dawson, K. S., Ebelke, G., Eisenstein, D. J., Hamilton, J. -C., Ho, S., Hogg, D. W., Honscheid, K., Lee, K. -G., Lundgren, B., Malanushenko, E., Malanushenko, V., Margala, D., Maraston, C., Mehta, K., Miralda-Escudé, J., Myers, A. D., Nichol, R. C., Noterdaeme, P., Olmstead, M. D., Oravetz, D., Palanque-Delabrouille, N., Pan, K., Pâris, I., Percival, W. J., Petitjean, P., Roe, N. A., Rollinde, E., Ross, N. P., Rossi, G., Schlegel, D. J., Schneider, D. P., Shelden, A., Sheldon, E. S., Simmons, A., Snedden, S., Tinker, J. L., Viel, M., Weaver, B. A., Weinberg, D. H., White, M., Yèche, C., and York, D. G.. 2013. "Baryon acoustic oscillations in the Lyα forest of BOSS quasars". United States. doi:10.1051/0004-6361/201220724. https://www.osti.gov/servlets/purl/1407184.
@article{osti_1407184,
title = {Baryon acoustic oscillations in the Lyα forest of BOSS quasars},
author = {Busca, N. G. and Delubac, T. and Rich, J. and Bailey, S. and Font-Ribera, A. and Kirkby, D. and Le Goff, J. -M. and Pieri, M. M. and Slosar, A. and Aubourg, É. and Bautista, J. E. and Bizyaev, D. and Blomqvist, M. and Bolton, A. S. and Bovy, J. and Brewington, H. and Borde, A. and Brinkmann, J. and Carithers, B. and Croft, R. A. C. and Dawson, K. S. and Ebelke, G. and Eisenstein, D. J. and Hamilton, J. -C. and Ho, S. and Hogg, D. W. and Honscheid, K. and Lee, K. -G. and Lundgren, B. and Malanushenko, E. and Malanushenko, V. and Margala, D. and Maraston, C. and Mehta, K. and Miralda-Escudé, J. and Myers, A. D. and Nichol, R. C. and Noterdaeme, P. and Olmstead, M. D. and Oravetz, D. and Palanque-Delabrouille, N. and Pan, K. and Pâris, I. and Percival, W. J. and Petitjean, P. and Roe, N. A. and Rollinde, E. and Ross, N. P. and Rossi, G. and Schlegel, D. J. and Schneider, D. P. and Shelden, A. and Sheldon, E. S. and Simmons, A. and Snedden, S. and Tinker, J. L. and Viel, M. and Weaver, B. A. and Weinberg, D. H. and White, M. and Yèche, C. and York, D. G.},
abstractNote = {In this paper, we report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the Lyα 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 h-1 Mpc < r < 200 h-1. 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, combined with priors on $H_0$ and the baryon density, 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. Finally, combined with measurements of H0, one sees the pattern of deceleration followed by acceleration characteristic of a dark-energy dominated universe.},
doi = {10.1051/0004-6361/201220724},
journal = {Astronomy and Astrophysics},
number = ,
volume = 552,
place = {United States},
year = {2013},
month = {4}
}