Статья

Clustering of quasars in SDSS-IV eBOSS: study of potential systematics and bias determination

Pierre LaurentIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceSarah EftekharzadehDepartment of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, U.S.AJean-Marc Le GoffCEA Paris-SaclayAdam D. MyersDepartment of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, U.S.AE. BurtinIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceMartin WhiteDepartment of Astronomy, University of California, Berkeley, CA 94720, U.S.AA.J. RossCenter for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, U.S.AJeremy L. TinkerCenter for Cosmology and Particle Physics, Department of Physics, New York University, New York, 10003, U.S.ARita TojeiroSchool of Physics and Astronomy, North Haugh, St. Andrews KY16 9SS, U.KJulian BautistaDepartment of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, U.S.AJ. BrinkmannApache Point Observatory, P.O. Box 59, Sunspot, NM 88349, U.S.AJohan ComparatMax-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, 85748 Garching, GermanyKyle DawsonDepartment of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, U.S.AHélion du Mas des BourbouxIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceJean‐Paul KneibLaboratoire d'Astrophysique, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, SwitzerlandI. D. McGreerSteward Observatory, University of Arizona, Tucson, AZ 85721–0065, U.S.AN. Palanque‐DelabrouilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceWill J. PercivalInstitute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama building, PO1 3FX, Portsmouth, U.KFrancisco PradaInstituto de Fìsica Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, SpainGraziano RossiDepartment of Astronomy and Space Science, Sejong University, Seoul, 143-747, KoreaDonald P. SchneiderInstitute for Gravitation and the Cosmos, Pennsylvania State University, University Park, PA 16802, U.S.ADavid WeinbergDepartment of Physics and Center for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, U.S.AChristophe YècheIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FrancePauline ZarroukIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceGong‐Bo ZhaoNational Astronomical Observatories of China, Beijing 100012, China

2017en

ABI

Аннотация

We study the first year of the eBOSS quasar sample in the redshift range 0.9&lt;z&lt;2.2 which includes 68,772 homogeneously selected quasars. We show that the main source of systematics in the evaluation of the correlation function arises from inhomogeneities in the quasar target selection, particularly related to the extinction and depth of the imaging data used for targeting. We propose a weighting scheme that mitigates these systematics. We measure the quasar correlation function and provide the most accurate measurement to date of the quasar bias in this redshift range, bQ = 2.45 ± 0.05 at <img src="https://ej.iop.org/icons/Entities/barz.gif" alt="bar z" align="baseline" />=1.55, together with its evolution with redshift. We use this information to determine the minimum mass of the halo hosting the quasars and the characteristic halo mass, which we find to be both independent of redshift within statistical error. Using a recently-measured quasar-luminosity-function we also determine the quasar duty cycle. The size of this first year sample is insufficient to detect any luminosity dependence to quasar clustering and this issue should be further studied with the final ~500,000 eBOSS quasar sample.

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Идентификаторы

DOI: 10.1088/1475-7516/2017/07/017

Цитирования и источники

Цитирований: 2Использованных источников: 0

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