Статья

The effect of quasar redshift errors on Lyman-α forest correlation functions

Samantha YoulesInstitute of Cosmology & Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UKJulian BautistaCPPM, CNRS/IN2P3 - Aix-Marseille University , F-13009 Marseille, FranceAndreu Font-RiberaDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKDavid BaconInstitute of Cosmology & Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UKJames RichIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceDavid BrooksDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKT. M. DavisSchool of Mathematics and Physics, University of Queensland , 4072, AustraliaKyle DawsonDepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USAAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, MéxicoG. DhunganaDepartment of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USAP. DoelDepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKKevin FanningDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USAE. GaztañagaInstitute of Space Sciences, ICE-CSIC , Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainSatya Gontcho A GontchoLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAAlma X. González‐MoralesConsejo Nacional de Ciencia y Tecnología , Av. Insurgentes Sur 1582. Colonia Crédito Constructor, Del. Benito Juárez C.P. 03940, México D.F. MéxicoJulien GuyLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAK. HonscheidCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USAVid IršičCavendish Laboratory, University of Cambridge , 19 J. J. Thomson Ave., Cambridge CB3 0HE, UKR. KehoeDepartment of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USAD. KirkbyDepartment of Physics and Astronomy, University of California , Irvine, 92697, USATheodore KisnerLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAMartin LandriauLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAL. Le GuillouLaboratoire de Physique Nucléaire et de Hautes Energies (LPNHE) - CNRS/IN2P3, Sorbonne Université , F-75005 Paris, FranceM. E. LeviLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAPaul MartiniCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USAA. Muñoz-GutiérrezInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, MéxicoN. Palanque‐DelabrouilleIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceIgnasi Pérez-RàfolsInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona, SpainClaire PoppettLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USAC. Ramírez-PérezInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona, SpainM. SchubnellDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USAG. TarléDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USAMichael WaltherExcellence Cluster ORIGINS , Boltzmannstrasse 2, D-85748 Garching, Germany

2022en

ABI

Аннотация

ABSTRACT Using synthetic Lyman-α forests from the Dark Energy Spectroscopic Instrument (DESI) survey, we present a study of the impact of errors in the estimation of quasar redshift on the Lyman-α correlation functions. Estimates of quasar redshift have large uncertainties of a few hundred km s−1 due to the broadness of the emission lines and the intrinsic shifts from other emission lines. We inject Gaussian random redshift errors into the mock quasar catalogues, and measure the auto-correlation and the Lyman-α-quasar cross-correlation functions. We find a smearing of the BAO feature in the radial direction, but changes in the peak position are negligible. However, we see a significant unphysical correlation for small separations transverse to the line of sight which increases with the amplitude of the redshift errors. We interpret this contamination as a result of the broadening of emission lines in the measured mean continuum, caused by quasar redshift errors, combined with the unrealistically strong clustering of the simulated quasars on small scales.

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Идентификаторы

DOI: 10.1093/mnras/stac2102

Цитирования и источники

Цитирований: 2Использованных источников: 0

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