Search Results - "Zhai, Zhongxu"
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The Aemulus Project. I. Numerical Simulations for Precision Cosmology
Published in The Astrophysical journal (10-04-2019)“…The rapidly growing statistical precision of galaxy surveys has led to a need for ever more precise predictions of the observables used to constrain…”
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The Aemulus Project. II. Emulating the Halo Mass Function
Published in The Astrophysical journal (10-02-2019)“…Existing models for the dependence of the halo mass function on cosmological parameters will become a limiting source of systematic uncertainty for cluster…”
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The Aemulus Project. III. Emulation of the Galaxy Correlation Function
Published in The Astrophysical journal (20-03-2019)“…Using the N-body simulations of the Aemulus Project, we construct an emulator for the nonlinear clustering of galaxies in real and redshift space. We construct…”
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The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
Published in Monthly notices of the Royal Astronomical Society (21-09-2017)“…Abstract We present cosmological results from the final galaxy clustering data set of the Baryon Oscillation Spectroscopic Survey, part of the Sloan Digital…”
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The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope
Published in The Astrophysical journal (01-03-2022)“…Abstract The Nancy Grace Roman Space Telescope will conduct a High Latitude Spectroscopic Survey (HLSS) over a large volume at high redshift, using the near-IR…”
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The Aemulus Project. V. Cosmological Constraint from Small-scale Clustering of BOSS Galaxies
Published in The Astrophysical journal (01-05-2023)“…Abstract We analyze clustering measurements of BOSS galaxies using a simulation-based emulator of two-point statistics. We focus on the monopole and quadrupole…”
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The Aemulus Project. VI. Emulation of Beyond-standard Galaxy Clustering Statistics to Improve Cosmological Constraints
Published in The Astrophysical journal (01-02-2024)“…Abstract There is untapped cosmological information in galaxy redshift surveys in the nonlinear regime. In this work, we use the Aemulus suite of cosmological…”
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The Clustering of Luminous Red Galaxies at z ∼ 0.7 from EBOSS and BOSS Data
Published in The Astrophysical journal (20-10-2017)“…We present the first scientific results from the luminous red galaxy (LRG) sample of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) combined with…”
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Emulating Power Spectra for Prereconstructed and Postreconstructed Galaxy Samples
Published in The Astrophysical journal (01-05-2024)“…Abstract The small-scale linear information in galaxy samples typically lost during nonlinear growth can be restored to a certain level by the density field…”
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Testing the framework of the halo occupation distribution with assembly bias modeling and empirical extensions
Published in Monthly notices of the Royal Astronomical Society (04-11-2024)“…Abstract We investigate theoretical systematics caused by the application of the halo occupation distribution (HOD) to the study of galaxy clustering at…”
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Constraints of f(R) gravity in Palatini approach with observational Hubble data
Published in Science China. Physics, mechanics & astronomy (01-08-2011)“…We use the newly released observational H ( z ) data (OHD), the Cosmic Microwave Background (CMB) shift parameter, and the Baryon Acoustic Oscillation (BAO)…”
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An Evaluation of Cosmological Models from the Expansion and Growth of Structure Measurements
Published in The Astrophysical journal (01-12-2017)“…We compare a large suite of theoretical cosmological models to observational data from the cosmic microwave background, baryon acoustic oscillation…”
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Phenomenological power spectrum models for H α emission line galaxies from the Nancy Grace Roman Space Telescope
Published in Monthly notices of the Royal Astronomical Society (30-05-2023)“…ABSTRACT The High Latitude Spectroscopic Survey (HLSS) is the reference baseline spectroscopic survey for NASA’s Nancy Grace Roman Space Telescope, measuring…”
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Small-scale clustering of BOSS galaxies: dependence on luminosity, colour, age, stellar mass, specific star formation rate, and other properties
Published in Monthly notices of the Royal Astronomical Society (22-06-2023)“…ABSTRACT We measure and analyse galaxy clustering and the dependence on luminosity, colour, age, stellar mass, and specific star formation rate using Baryon…”
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Prediction of H α and [O iii] emission line galaxy number counts for future galaxy redshift surveys
Published in Monthly notices of the Royal Astronomical Society (01-12-2019)“…ABSTRACT We perform a simulation with Galacticus, a semi-analytical galaxy formation model, to predict the number counts of H α and [O iii] emitting galaxies…”
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Linear bias and halo occupation distribution of emission-line galaxies from Nancy Grace Roman Space Telescope
Published in Monthly notices of the Royal Astronomical Society (01-08-2021)“…ABSTRACT We present measurements of the linear galaxy bias of Hα and [O iii] emission-line galaxies (ELGs) for the High Latitude Spectroscopic Survey (HLSS) of…”
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Isolating the linear signal when making redshift space distortion measurements
Published in Monthly notices of the Royal Astronomical Society (01-10-2023)“…ABSTRACT Constraints on the linear growth rate, fσ8, using small-scale redshift space distortion measurements have a significant statistical advantage over…”
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Clustering in the simulated H α galaxy redshift survey from Nancy Grace Roman Space Telescope
Published in Monthly notices of the Royal Astronomical Society (01-03-2021)“…ABSTRACT We present a realistic 2000 deg2 H α galaxy mock catalogue with 1 < z < 2 for the Nancy Grace Roman Space Telescope (Roman) galaxy redshift survey,…”
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The SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations at Redshift of 0.72 with the DR14 Luminous Red Galaxy Sample
Published in The Astrophysical journal (10-08-2018)“…The extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 sample includes 80,118 luminous red galaxies (LRGs). By combining these galaxies…”
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A Forecast for the Detection of the Power Asymmetry from Galaxy Surveys
Published in The Astrophysical journal (20-11-2017)“…We investigate the possibility of detecting a hemispherical power asymmetry in redshift surveys that is similar to that first reported in cosmic microwave…”
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