Finding High-Redshift Galaxies with JWST

Abstract

One of the primary goals for the upcoming James Webb Space Telescope (JWST) is to observe the first galaxies. Predictions for planned and proposed surveys have typically focused on average galaxy counts, assuming a random distribution of galaxies across the observed field. The first and most massive galaxies, however, are expected to be tightly clustered, an effect known as cosmic variance. We show that cosmic variance is likely to be the dominant contribution to uncertainty for high-redshift mass and luminosity functions, and that median high-redshift and high-mass galaxy counts for planned observations lie significantly below average counts. Several different strategies are considered for improving our understanding of the first galaxies, including adding depth, area, and independent pointings. Adding independent pointings is shown to be the most efficient both for discovering the single highest-redshift galaxy and also for constraining mass and luminosity functions.

arXiv comment16 pages, ApJ, in press

References in corpus (49)

• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• The James Webb Space Telescope
• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• New Insight on Galaxy Formation and Evolution from Keck Spectroscopy of the Hawaii Deep Fields
• A Highly Consistent Framework for the Evolution of the Star-Forming "Main Sequence" from z~0-6
• Physical Models of Galaxy Formation in a Cosmological Framework
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• Modeling Luminosity-Dependent Galaxy Clustering Through Cosmic Time
• The Frontier Fields: Survey Design
• The tumultuous lives of galactic dwarfs and the missing satellites problem
• A Remarkably Luminous Galaxy at z=11.1 Measured with Hubble Space Telescope Grism Spectroscopy
• The Gemini Deep Deep Survey: III. The abundance of massive galaxies 3-6 billion years after the Big Bang
• The Evolution of the Galaxy Stellar Mass Function at z= 4-8: A Steepening Low-mass-end Slope with Increasing Redshift
• Cosmic Variance in the Great Observatories Origins Deep Survey
• A massive proto-cluster of galaxies at a redshift of z {\approx} 5.3
• A galaxy at a redshift z = 6.96
• A Cosmic Variance Cookbook
• The Galaxy UV Luminosity Function Before the Epoch of Reionization
• The Non-Parametric Model for Linking Galaxy Luminosity with Halo/Subhalo Mass
• A redshift-independent efficiency model: star formation and stellar masses in dark matter halos at z>4
• The Grism Lens-Amplified Survey from Space (GLASS). I. Survey overview and first data release
• What are Protoclusters? -- Defining High Redshift Galaxy Clusters and Protoclusters
• Constraints on the Star Formation Efficiency of Galaxies During the Epoch of Reionization
• CARS: The CFHTLS-Archive-Research Survey II. Weighing dark matter halos of Lyman-break galaxies at z=3-5
• The JWST Extragalactic Mock Catalog: Modeling galaxy populations from the UV through the near-IR over thirteen billion years of cosmic history
• Essential physics of early galaxy formation
• A Galaxy at z=5.34
• The Global 21-cm Signal in the Context of the High-z Galaxy Luminosity Function
• The Universe at z>10: Predictions for JWST from the UniverseMachine DR1
• A physical model for the 0 < z < 8 redshift evolution of the galaxy UV luminosity and stellar mass functions
• Astraeus I: The interplay between galaxy formation and reionization
• On using angular cross-correlations to determine source redshift distributions
• The Impossibly Early Galaxy Problem
• The Most Massive Galaxies and Black Holes Allowed by $\Lambda$CDM
• The-wiZZ: Clustering redshift estimation for everyone
• A Lyman-α protocluster at redshift 6.9
• Clustering-based Redshift Estimation: Comparison to Spectroscopic Redshifts
• A Giant Protocluster of Galaxies at Redshift 5.7
• How well do cosmological simulations reproduce individual-halo properties?
• Cosmic variance of $z>7$ galaxies: Prediction from BlueTides
• RELICS: Strong Lensing Analysis of MACS J0417.5-1154 and Predictions for Observing the Magnified High-Redshift Universe with JWST
• The Overlooked Potential of Generalized Linear Models in Astronomy-III: Bayesian Negative Binomial Regression and Globular Cluster Populations
• A Flexible Analytic Model of Cosmic Variance in the First Billion Years
• The Cosmic Microwave Background and the Stellar Initial Mass Function
• A Uniform History for Galaxy Evolution