The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the emission line galaxy sample from the anisotropic power spectrum…

By A. de Mattia, V. Ruhlmann-Kleider, A. Raichoor, A. Ross, A. Tamone, Cheng Zhao, Shadab Alam, S. Ávila, É. Burtin, Julián Bautista and 26 more. Monthly notices of the Royal Astronomical Society, 2020

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We analyse the large-scale clustering in Fourier space of emission line galaxies (ELG) from the Data Release 16 of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey. The ELG sample contains 173,736 galaxies covering 1,170 square degrees in the redshift range 0.6 < z < 1.1. We perform a BAO measurement from the post-reconstruction power spectrum monopole, and study redshift space distortions (RSD) in the first three even multipoles. Photometric variations yield fluctuations of both the angular and radial survey selection functions. Those are directly inferred from data, imposing integral constraints which we model consistently. The full data set has only a weak preference for a BAO feature (1.4σ). At the effective redshift zeff = 0.845 we measure $D_{\rm V}(z_{\rm eff})/r_{\rm drag} = 18.33_{-0.62}^{+0.57}$, with DV the volume-averaged distance and rdrag the comoving sound horizon at the drag epoch. In combination with the RSD measurement, at zeff = 0.85 we find $f\sigma _8(z_{\rm eff}) = 0.289_{-0.096}^{+0.085}$, with f the growth rate of structure and σ8 the normalisation of the linear power spectrum, $D_{\rm H}(z_{\rm eff})/r_{\rm drag} = 20.0_{-2.2}^{+2.4}$ and DM(zeff)/rdrag = 19.17 ± 0.99 with DH and DM the Hubble and comoving angular distances, respectively. These results are in agreement with those obtained in configuration space, thus allowing a consensus measurement of fσ8(zeff) = 0.315 ± 0.095, $D_{\rm H}(z_{\rm eff})/r_{\rm drag} = 19.6_{-2.1}^{+2.2}$ and DM(zeff)/rdrag = 19.5 ± 1.0. This measurement is consistent with a flat ΛCDM model with Planck parameters.

Subfields: Astronomy and Astrophysics, Instrumentation, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/66e5fff86b9741dd7f886d3382006bb8ac90ea42

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Citations in the corpus

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, methodology): “…part of a coordinated release of the final eBOSS measurements of BAO and RSD in the clustering of luminous red galaxies (LRG; Bautista et al. 2020; Gil-Marin et al. 2020), emission line galaxies (ELG; Raichoor et al. 2020; Tamone et al. 2020; de Mattia et al. 2020), and quasars (Hou et al. 2020;…”
Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument (2023, background): “…(Ross et al. 2015; Howlett et al. 2015; Alam et al. 2017; Bautista et al. 2021; Gil-Mar´ın et al. 2020; Raichoor et al. 2021; Tamone et al. 2020; de Mattia et al. 2020; Hou et al. 2021; Neveux et al. 2020; du Mas des Bourboux et al. 2020), CMB data from Planck , SNe Ia data from the…”
The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests (2020, background): “6 1.0 (Bautista et al. 2020; Gil-Marín et al. 2020), of emission-line galaxies (ELGs) in the range 0.6<z<1.1 (Raichoor et al. 2020; Tamone et al. 2020; de Mattia et al. 2020), and of quasars in the range 0.8<z<2.2 (Hou et al. 2020; Neveux et al. 2020).”
The Hubble tension in light of the Full-Shape analysis of Large-Scale Structure data (2020, background): “8It would be interesting to add the latest eBOSS data [76, 77] to potentially strengthen our constraints.”