Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4

Hélion Du Mas Des Bourboux, Jean Marc Le Goff, Michael Blomqvist, Nicolás G. Busca, Julien Guy, James Rich, Christophe Yèche, Julian E. Bautista, Étienne Burtin, Kyle S. Dawson, Daniel J. Eisenstein, Andreu Font-Ribera, David Kirkby, Jordi Miralda-Escudé, Pasquier Noterdaeme, Nathalie Palanque-Delabrouille, Isabelle Pâris, Patrick Petitjean, Ignasi Pérez-Ràfols, Matthew M. Pieri & 6 others Nicholas P. Ross, David J. Schlegel, Donald P. Schneider, Anz E. Slosar, David H. Weinberg, Pauline Zarrouk

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Abstract

We present a measurement of baryon acoustic oscillations (BAO) in the cross-correlation of quasars with the Lyα-forest flux transmission at a mean redshift of z = 2.40. The measurement uses the complete Sloan Digital Sky Survey (SDSS-III) data sample: 168 889 forests and 234 367 quasars from the SDSS data release DR12. In addition to the statistical improvement on our previous study using DR11, we have implemented numerous improvements at the analysis level enabling a more accurate measurement of this cross-correlation. We have also developed the first simulations of the cross-correlation that allow us to test different aspects of our data analysis and to search for potential systematic errors in the determination of the BAO peak position. We measure the two ratios DH(z = 2.40) /rd = 9.01 ± 0.36 and DM(z = 2.40) /rd = 35.7 ± 1.7, where the errors include marginalization over the non-linear velocity of quasars and the cross-correlation of metals and quasars, among other effects. These results are within 1.8σ of the prediction of the flat-ΛCDM model describing the observed cosmic microwave background anisotropies. We combine this study with the Lyα-forest auto-correlation function, yielding DH(z = 2.40) /rd = 8.94 ± 0.22 and DM(z = 2.40) /rd = 36.6 ± 1.2, within 2.3σ of the same flat-ΛCDM model.

Original languageEnglish (US)
Article numberA130
JournalAstronomy and Astrophysics
Volume608
DOIs
StatePublished - Dec 1 2017

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cross correlation
quasars
baryons
acoustics
oscillation
oscillations
marginalization
systematic errors
autocorrelation
anisotropy
microwaves
metal
prediction
predictions
metals
simulation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Du Mas Des Bourboux, H., Le Goff, J. M., Blomqvist, M., Busca, N. G., Guy, J., Rich, J., ... Zarrouk, P. (2017). Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4. Astronomy and Astrophysics, 608, [A130]. https://doi.org/10.1051/0004-6361/201731731
Du Mas Des Bourboux, Hélion ; Le Goff, Jean Marc ; Blomqvist, Michael ; Busca, Nicolás G. ; Guy, Julien ; Rich, James ; Yèche, Christophe ; Bautista, Julian E. ; Burtin, Étienne ; Dawson, Kyle S. ; Eisenstein, Daniel J. ; Font-Ribera, Andreu ; Kirkby, David ; Miralda-Escudé, Jordi ; Noterdaeme, Pasquier ; Palanque-Delabrouille, Nathalie ; Pâris, Isabelle ; Petitjean, Patrick ; Pérez-Ràfols, Ignasi ; Pieri, Matthew M. ; Ross, Nicholas P. ; Schlegel, David J. ; Schneider, Donald P. ; Slosar, Anz E. ; Weinberg, David H. ; Zarrouk, Pauline. / Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4. In: Astronomy and Astrophysics. 2017 ; Vol. 608.
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abstract = "We present a measurement of baryon acoustic oscillations (BAO) in the cross-correlation of quasars with the Lyα-forest flux transmission at a mean redshift of z = 2.40. The measurement uses the complete Sloan Digital Sky Survey (SDSS-III) data sample: 168 889 forests and 234 367 quasars from the SDSS data release DR12. In addition to the statistical improvement on our previous study using DR11, we have implemented numerous improvements at the analysis level enabling a more accurate measurement of this cross-correlation. We have also developed the first simulations of the cross-correlation that allow us to test different aspects of our data analysis and to search for potential systematic errors in the determination of the BAO peak position. We measure the two ratios DH(z = 2.40) /rd = 9.01 ± 0.36 and DM(z = 2.40) /rd = 35.7 ± 1.7, where the errors include marginalization over the non-linear velocity of quasars and the cross-correlation of metals and quasars, among other effects. These results are within 1.8σ of the prediction of the flat-ΛCDM model describing the observed cosmic microwave background anisotropies. We combine this study with the Lyα-forest auto-correlation function, yielding DH(z = 2.40) /rd = 8.94 ± 0.22 and DM(z = 2.40) /rd = 36.6 ± 1.2, within 2.3σ of the same flat-ΛCDM model.",
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Du Mas Des Bourboux, H, Le Goff, JM, Blomqvist, M, Busca, NG, Guy, J, Rich, J, Yèche, C, Bautista, JE, Burtin, É, Dawson, KS, Eisenstein, DJ, Font-Ribera, A, Kirkby, D, Miralda-Escudé, J, Noterdaeme, P, Palanque-Delabrouille, N, Pâris, I, Petitjean, P, Pérez-Ràfols, I, Pieri, MM, Ross, NP, Schlegel, DJ, Schneider, DP, Slosar, AE, Weinberg, DH & Zarrouk, P 2017, 'Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4', Astronomy and Astrophysics, vol. 608, A130. https://doi.org/10.1051/0004-6361/201731731

Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4. / Du Mas Des Bourboux, Hélion; Le Goff, Jean Marc; Blomqvist, Michael; Busca, Nicolás G.; Guy, Julien; Rich, James; Yèche, Christophe; Bautista, Julian E.; Burtin, Étienne; Dawson, Kyle S.; Eisenstein, Daniel J.; Font-Ribera, Andreu; Kirkby, David; Miralda-Escudé, Jordi; Noterdaeme, Pasquier; Palanque-Delabrouille, Nathalie; Pâris, Isabelle; Petitjean, Patrick; Pérez-Ràfols, Ignasi; Pieri, Matthew M.; Ross, Nicholas P.; Schlegel, David J.; Schneider, Donald P.; Slosar, Anz E.; Weinberg, David H.; Zarrouk, Pauline.

In: Astronomy and Astrophysics, Vol. 608, A130, 01.12.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Baryon acoustic oscillations from the complete SDSS-III Ly α -quasar cross-correlation function at z = 2.4

AU - Du Mas Des Bourboux, Hélion

AU - Le Goff, Jean Marc

AU - Blomqvist, Michael

AU - Busca, Nicolás G.

AU - Guy, Julien

AU - Rich, James

AU - Yèche, Christophe

AU - Bautista, Julian E.

AU - Burtin, Étienne

AU - Dawson, Kyle S.

AU - Eisenstein, Daniel J.

AU - Font-Ribera, Andreu

AU - Kirkby, David

AU - Miralda-Escudé, Jordi

AU - Noterdaeme, Pasquier

AU - Palanque-Delabrouille, Nathalie

AU - Pâris, Isabelle

AU - Petitjean, Patrick

AU - Pérez-Ràfols, Ignasi

AU - Pieri, Matthew M.

AU - Ross, Nicholas P.

AU - Schlegel, David J.

AU - Schneider, Donald P.

AU - Slosar, Anz E.

AU - Weinberg, David H.

AU - Zarrouk, Pauline

PY - 2017/12/1

Y1 - 2017/12/1

N2 - We present a measurement of baryon acoustic oscillations (BAO) in the cross-correlation of quasars with the Lyα-forest flux transmission at a mean redshift of z = 2.40. The measurement uses the complete Sloan Digital Sky Survey (SDSS-III) data sample: 168 889 forests and 234 367 quasars from the SDSS data release DR12. In addition to the statistical improvement on our previous study using DR11, we have implemented numerous improvements at the analysis level enabling a more accurate measurement of this cross-correlation. We have also developed the first simulations of the cross-correlation that allow us to test different aspects of our data analysis and to search for potential systematic errors in the determination of the BAO peak position. We measure the two ratios DH(z = 2.40) /rd = 9.01 ± 0.36 and DM(z = 2.40) /rd = 35.7 ± 1.7, where the errors include marginalization over the non-linear velocity of quasars and the cross-correlation of metals and quasars, among other effects. These results are within 1.8σ of the prediction of the flat-ΛCDM model describing the observed cosmic microwave background anisotropies. We combine this study with the Lyα-forest auto-correlation function, yielding DH(z = 2.40) /rd = 8.94 ± 0.22 and DM(z = 2.40) /rd = 36.6 ± 1.2, within 2.3σ of the same flat-ΛCDM model.

AB - We present a measurement of baryon acoustic oscillations (BAO) in the cross-correlation of quasars with the Lyα-forest flux transmission at a mean redshift of z = 2.40. The measurement uses the complete Sloan Digital Sky Survey (SDSS-III) data sample: 168 889 forests and 234 367 quasars from the SDSS data release DR12. In addition to the statistical improvement on our previous study using DR11, we have implemented numerous improvements at the analysis level enabling a more accurate measurement of this cross-correlation. We have also developed the first simulations of the cross-correlation that allow us to test different aspects of our data analysis and to search for potential systematic errors in the determination of the BAO peak position. We measure the two ratios DH(z = 2.40) /rd = 9.01 ± 0.36 and DM(z = 2.40) /rd = 35.7 ± 1.7, where the errors include marginalization over the non-linear velocity of quasars and the cross-correlation of metals and quasars, among other effects. These results are within 1.8σ of the prediction of the flat-ΛCDM model describing the observed cosmic microwave background anisotropies. We combine this study with the Lyα-forest auto-correlation function, yielding DH(z = 2.40) /rd = 8.94 ± 0.22 and DM(z = 2.40) /rd = 36.6 ± 1.2, within 2.3σ of the same flat-ΛCDM model.

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