The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of baryon acoustic oscillations between redshift 0.8 and 2.2

We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using the clustering of quasars. We consider a sample of 147 000 quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z < 2.2...

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Detalles Bibliográficos
Autores: Ata, M., Baumgarten, F., Bautista, J., Beutler, F., Bizyaev, Dmitry, Blanton, M. R., Blazek, J.A., Bolton, A.S., Brinkmann, J., Brownstein, J.R., Burtin, E., Chuang, C. H., Comparat, Johan, Dawson, K.S., de la Macorra, A., Du, W., des Bourboux, H. d. M., Eisenstein, D. J., Gil-Marín, Héctor, Grabowski, K., Guy, Julien, Hand, N., Ho, S., Hutchinson, T. A., Ivanov, M. M., Kitaura, Francisco-Shu, Kneib, Jean-Paul, Laurent, P., Le Goff, Jean-Marc, McEwen, J. E., Mueller, E.M., Myers, A.D., Newman, J.A., Palanque-Delabrouille, Nathalie, Pan, K., Pâris, I., Pellejero-Ibanez, M., Percival, W.J., Petitjean, P., Prada, Francisco, Prakash, A., Rodríguez-Torres, S. A., Ross, Ashley J., Rossi, G., Ruggeri, R., Sánchez, A. G., Satpathy, S., Schlegel, David J., Schneider, D. P., Streblyanska, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/206985
Acceso en línea:http://hdl.handle.net/10261/206985
Access Level:acceso abierto
Palabra clave:Cosmology: observations
Dark energy
Distance scale
Large-scale structure of the universe
Descripción
Sumario:We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using the clustering of quasars. We consider a sample of 147 000 quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z < 2.2 and measure their spherically averaged clustering in both configuration and Fourier space. Our observational data set and the 1400 simulated realizations of the data set allow us to detect a preference for BAO that is greater than 2.8σ. We determine the spherically averaged BAO distance to z = 1.52 to 3.8 per cent precision: D (z = 1.52) = 3843 ± 147 (r/r) Mpc. This is the first time the location of the BAO feature has been measured between redshifts 1 and 2. Our result is fully consistent with the prediction obtained by extrapolating the Planck flatΛCDMbest-fitting cosmology. All of our results are consistent with basic large-scale structure (LSS) theory, confirming quasars to be a reliable tracer of LSS, and provide a starting point for numerous cosmological tests to be performed with eBOSS quasar samples. We combine our result with previous, independent, BAO distance measurements to construct an updated BAO distance-ladder. Using these BAO data alone and marginalizing over the length of the standard ruler, we find Ω > 0 at 6.6s significance when testing a ΛCDM model with free curvature.C 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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