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Cited by 222

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The one-dimensional Ly α forest power spectrum from BOSS

Open access
Palanque-Delabrouille, Nathalie, Yèche, Christophe, Borde, Arnaud, Le Goff, Jean-Marc, Rossi, Graziano, Viel, Matteo, Aubourg, Éric, Bailey, Stephen, Bautista, Julian, Blomqvist, Michael, Bolton, Adam, Bolton, James S., Busca, Nicolás G., Carithers, Bill, A. C. Croft, Rupert, Dawson, Kyle S., Delubac, Timothée, Font-Ribera, Andreu, Ho, Shirley, Kirkby, David, Lee, Khee-Gan, Margala, Daniel, Miralda-Escudé, Jordi, Muna, Demitri, Myers, Adam D., Noterdaeme, Pasquier, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M., Rich, James, Rollinde, Emmanuel, Ross, Nicholas P., Schlegel, David J., Schneider, Donald P., Slosar, Anže, Weinberg, David H.·2013·Astronomy & Astrophysics

Abstract

We have developed two independent methods for measuring the one-dimensional power spectrum of the transmitted flux in the Lyman-α forest. The first method is based on a Fourier transform and the second on a maximum-likelihood estimator. The two methods are independent and have different systematic uncertainties. Determination of the noise level in the data spectra was subject to a new treatment, because of its significant impact on the derived power spectrum. We applied the two methods to 13 821 quasar spectra from SDSS-III/BOSS DR9 selected from a larger sample of over 60 000 spectra on the basis of their high quality, high signal-to-noise ratio (S/N), and good spectral resolution. The power spectra measured using either approach are in good agreement over all twelve redshift bins from ⟨z⟩ = 2.2 to ⟨z⟩ = 4.4, and scales from 0.001 km s-1 to 0.02 km s-1. We determined the methodological andinstrumental systematic uncertainties of our measurements. We provide a preliminary cosmological interpretation of our measurements using available hydrodynamical simulations. The improvement in precision over previously published results from SDSS is a factor 2–3 for constraints on relevant cosmological parameters. For a ΛCDM model and using a constraint on H0 that encompasses measurements based on the local distance ladder and on CMB anisotropies, we infer σ8 = 0.83 ± 0.03 and ns = 0.97 ± 0.02 based on H i absorption in the range 2.1 < z < 3.7.

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Authors
Palanque-Delabrouille, N., Yèche, C., Borde, A., Le Goff, J.-M., Rossi, G., Viel, M., Aubourg, É., Bailey, S., Bautista, J., Blomqvist, M., Bolton, A., Bolton, J. S., Busca, N. G., Carithers, B., A. C. Croft, R., Dawson, K. S., Delubac, T., Font-Ribera, A., Ho, S., Kirkby, D., Lee, K.-G., Margala, D., Miralda-Escudé, J., Muna, D., Myers, A. D., Noterdaeme, P., Pâris, I., Petitjean, P., Pieri, M. M., Rich, J., Rollinde, E., Ross, N. P., Schlegel, D. J., Schneider, D. P., Slosar, A., & Weinberg, D. H.
Venue
Astronomy & Astrophysics
Publisher
EDP Sciences
Published
2013-11
Volume
559
Pages
A85
ISSN
  • 0004-6361 (ISSN-L)
  • 1432-0746
OpenAlex
W2593774047
Cited by
222
References
5
FWCI
10.03
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: The one-dimensional Ly α forest power spectrum from BOSS. https://app.cochat.ai/papers/10.1051/0004-6361/201322130
The paper
Palanque-Delabrouille, N., Yèche, C., Borde, A., Le Goff, J.-M., Rossi, G., Viel, M., Aubourg, É., Bailey, S., Bautista, J., Blomqvist, M., Bolton, A., Bolton, J. S., Busca, N. G., Carithers, B., A. C. Croft, R., Dawson, K. S., Delubac, T., Font-Ribera, A., Ho, S., . . . Weinberg, D. H. (2013). The one-dimensional Ly α forest power spectrum from BOSS. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/201322130

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