Details

Autor(en) / Beteiligte

• Mohammad, Faizan G
• Percival, Will J
• Seo, Hee-Jong
• Chapman, Michael J
• Bianchi, D
• Ross, Ashley J
• Zhao, Cheng
• Lang, Dustin
• Bautista, Julian
• Brinkmann, Jonathan
• Brownstein, Joel R
• Burtin, Etienne
• Chuang, Chia-Hsun
• Dawson, Kyle S
• de la Torre, Sylvain
• de Mattia, Arnaud
• Eftekharzadeh, Sarah
• Fromenteau, Sebastien
• Gil-Marín, Héctor
• Hou, Jiamin
• Mueller, Eva-Maria
• Neveux, Richard
• Paviot, Romain
• Raichoor, Anand
• Rossi, Graziano
• Schneider, Donald P
• Tamone, Amélie
• Tinker, Jeremy L
• Tojeiro, Rita
• Vargas Magaña, Mariana
• Zhao, Gong-Bo

Titel

The completed SDSS-IV extended baryon oscillation spectroscopic survey: pairwise-inverse probability and angular correction for fibre collisions in clustering measurements

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2020-10, Vol.498 (1), p.128-143

Ort / Verlag

United Kingdom: Oxford University Press (OUP): Policy P - Oxford Open Option A

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• ABSTRACT The completed extended Baryon Oscillation Spectroscopic Survey (eBOSS) catalogues contain redshifts of 344 080 quasars at 0.8 < z < 2.2, 174 816 luminous red galaxies between 0.6 < z < 1.0, and 173 736 emission-line galaxies over 0.6 < z < 1.1 in order to constrain the expansion history of the Universe and the growth rate of structure through clustering measurements. Mechanical limitations of the fibre-fed spectrograph on the Sloan telescope prevent two fibres being placed closer than 62 arcsec in a single pass of the instrument. These ‘fibre collisions’ strongly correlate with the intrinsic clustering of targets and can bias measurements of the two-point correlation function resulting in a systematic error on the inferred values of the cosmological parameters. We combine the new techniques of pairwise-inverse probability and the angular upweighting (PIP+ANG) to correct the clustering measurements for the effect of fibre collisions. Using mock catalogues, we show that our corrections provide unbiased measurements, within data precision, of both the projected $\rm {\mathit{ w}_p}\left(\mathit{ r}_p\right)$ and the redshift-space multipole ξ(ℓ = 0, 2, 4)(s) correlation functions down to $0.1\, h^{-1}{\rm Mpc}$, regardless of the tracer type. We apply the corrections to the eBOSS DR16 catalogues. We find that, on scales $s\gtrsim 20\, h^{-1}{\rm Mpc}$ for ξℓ, as used to make baryon acoustic oscillation and large-scale redshift-space distortion measurements, approximate methods such as nearest-neighbour upweighting are sufficiently accurate given the statistical errors of the data. Using the PIP method, for the first time for a spectroscopic program of the Sloan Digital Sky Survey, we are able to successfully access the one-halo term in the clustering measurements down to $\sim 0.1\, h^{-1}{\rm Mpc}$ scales. Our results will therefore allow studies that use the small-scale clustering to strengthen the constraints on both cosmological parameters and the halo occupation distribution models.