Performance of Photometric Template Fitting for Ultra-High Redshift Galaxies

Abstract

The James Webb Space Telescope (JWST) has enabled the discovery of a significant population of galaxies at z > 10. Our understanding of the astrophysical properties of these galaxies relies on fitting templates developed using models predicting the differences between these first galaxies and lower-redshift counterparts. In this work, tests are performed on several of these high-redshift template sets in order to determine how successful they are at predicting both photometric redshifts and full spectral energy distributions (SEDs). Our work shows that the best templates for photometric redshift estimation differ from the best templates for predicting the full SED. Overall, some templates perform adequately at photometric redshift estimation, while all are generally poor predictors of the full SED. A few objects in particular are poorly fit by all the template sets tested. We conclude that although photometric redshifts can be reliable when given a high enough observational depth and adequate filters, models are not yet able to produce robust astrophysical properties for these ultra-high-redshift galaxies.

16 pages, 9 figures

References in corpus (32)

• EAZY: A Fast, Public Photometric Redshift Code
• The Frontier Fields: Survey Design
• CANDELS Multi-wavelength Catalogs: Source Detection and Photometry in the GOODS-South Field
• The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Discovery and properties of ultra-high redshift galaxies ($9<z<12$) in the JWST ERO SMACS 0723 Field
• Angular momentum and galaxy formation revisited
• CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results
• PHAT: PHoto-z Accuracy Testing
• A massive quiescent galaxy at redshift 4.658
• Very Strong Emission-Line Galaxies in the WISP Survey and Implications for High-Redshift Galaxies
• Confirmation and refutation of very luminous galaxies in the early universe
• Spectroscopic Confirmation of CEERS NIRCam-selected Galaxies at $\mathbf{z}\simeq 8-10$
• JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy
• CEERS Spectroscopic Confirmation of NIRCam-Selected z > 8 Galaxy Candidates with JWST/NIRSpec: Initial Characterization of their Properties
• A Substantial Population of Red Galaxies at z > 2: Modeling of the Spectral Energy Distributions of an Extended Sample
• Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations
• The Physical Conditions of Emission-Line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations
• Should we believe the results of UV-mm galaxy SED modelling?
• First Batch of Candidate Galaxies at Redshifts 11 to 20 Revealed by the James Webb Space Telescope Early Release Observations
• UNCOVERing the extended strong lensing structures of Abell 2744 with the deepest JWST imaging
• Spectral Templates Optimal for Selecting Galaxies at z > 8 with JWST
• Templates for Fitting Photometry of Ultra-High-Redshift Galaxies
• The UNCOVER Survey: A First-look HST+JWST Catalog of Galaxy Redshifts and Stellar Population Properties Spanning $0.2\lesssim z\lesssim 15$
• Deriving star formation histories from photometry using energy balance spectral energy distribution modelling
• Implications of a Temperature Dependent IMF I: Photometric Template Fitting
• JWST/MIRI Simulated Imaging: Insights into Obscured Star-Formation and AGN for Distant Galaxies in Deep Surveys
• Exploring Photometric Redshifts as an Optimization Problem: An Ensemble MCMC and Simulated Annealing-Driven Template-Fitting Approach
• The Cosmic Microwave Background and the Stellar Initial Mass Function
• Real or Interloper? The Redshift Likelihoods of z>8 Galaxies in the HUDF12
• Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
• Narrow band selected high redshift galaxy candidates contaminated by lower redshift O[III] ultrastrong emitter line galaxies

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