The UNCOVER Survey: A first-look HST+JWST catalog of 50,000 galaxies near Abell 2744 and beyond

Weaver, John R.; Cutler, Sam E.; Pan, Richard; Whitaker, Katherine E.; Labbé, Ivo; Price, Sedona H.; Bezanson, Rachel; Brammer, Gabriel; Marchesini, Danilo; Leja, Joel; Wang, Bingjie; Furtak, Lukas J.; Zitrin, Adi; Atek, Hakim; Coe, Dan; Dayal, Pratika; Dokkum, Pieter van; Feldmann, Robert; Schreiber, N. Förster; Franx, Marijn; Fujimoto, Seiji; Fudamoto, Yoshinobu; Glazebrook, Karl; Graaff, Anna de; Greene, Jenny E.; Juneau, Stéphanie; Kassin, Susan; Kriek, Mariska; Khullar, Gourav; Maseda, Michael V.; Mowla, Lamiya; Muzzin, Adam; Nanayakkara, Themiya; Nelson, Erica J.; Oesch, Pascal; Pacifici, Camilla; Papovich, Casey; Setton, David J.; Shapley, Alice E.; Smit, Renske; Stefanon, Mauro; Taylor, Edward N.; Weibel, Andrea; Williams, Christina C.

doi:10.48550/arxiv.2301.02671

Cited by 19 publications

(39 citation statements)

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“…We crossmatch the sources to collect spectroscopic redshifts from the NASA/IPAC Extragalactic Database, Treu et al (2015), and Richard et al (2021). Data reduction follows Weaver et al (2023). The observed fluxes in the F444W band span roughly from 16.5 to 30.5 AB mag, with a 5σ depth of 25.5 AB mag.…”

Section: Datamentioning

confidence: 99%

Inferring More from Less: Prospector as a Photometric Redshift Engine in the Era of JWST

Wang

Leja

Bezanson

et al. 2023

ApJL

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The advent of the James Webb Space Telescope (JWST) signals a new era in exploring galaxies in the high-z universe. Current and upcoming JWST imaging will potentially detect galaxies at z ∼ 20, creating a new urgency in the quest to infer accurate photometric redshifts (photo-z) for individual galaxies from their spectral energy distributions, as well as masses, ages, and star formation rates. Here we illustrate the utility of informed priors encoding previous observations of galaxies across cosmic time in achieving these goals. We construct three joint priors encoding empirical constraints of redshifts, masses, and star formation histories in the galaxy population within the Prospector Bayesian inference framework. In contrast with uniform priors, our model breaks an age–mass–redshift degeneracy, and thus reduces the mean bias error in masses from 0.3 to 0.1 dex, and in ages from 0.6 to 0.2 dex in tests done on mock JWST observations. Notably, our model recovers redshifts at least as accurately as the state-of-the-art photo-z code EAzY in deep JWST fields, but with two advantages: tailoring a model based on a particular survey is rendered mostly unnecessary given well-motivated priors; obtaining joint posteriors describing stellar, active galactic nuclei, gas, and dust contributions becomes possible. We can now confidently use the joint distribution to propagate full non-Gaussian redshift uncertainties into inferred properties of the galaxy population. This model, “Prospector-β,” is intended for fitting galaxy photometry where the redshift is unknown, and will be instrumental in ensuring the maximum science return from forthcoming photometric surveys with JWST. The code is made publicly available online as a part of Prospector 9 9 The version used in this work corresponds to the state of the Git repository at commit https://github.com/bd-j/prospector/commit/820ad72363a1f9c22cf03610bfe6e361213385cd. .

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Section: Datamentioning

confidence: 99%

Inferring More from Less: Prospector as a Photometric Redshift Engine in the Era of JWST

Wang

Leja

Bezanson

et al. 2023

ApJL

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“…We design our observation to detect the rest-frame (Merlin et al 2022;Paris et al 2023;Weaver et al 2023), resulting in = -+ z 10.60 0.48 0.18 covering 50% of the full photo-z probability distribution (Merlin et al 2022). We set the central sky frequency (292.5 GHz) corresponding to z = 10.60 and construct four science goals (SGs) with spectral setups such that the total 26.125 GHz frequency range is covered without any gaps (see Figure 1).…”

Section: Design and Executionmentioning

confidence: 99%

ALMA Observation of a z ≳ 10 Galaxy Candidate Discovered with JWST

Yoon

Carilli

Fujimoto

et al. 2023

ApJ

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We report the observation by the Atacama Large Millimeter/submillimeter Array (ALMA) of a z ≳ 10 galaxy candidate (GHZ1) discovered from the GLASS–JWST Early Release Science Program. Our ALMA program aims to detect the [O iii] emission line at the rest-frame frequency 3393.0062 GHz (88.36 μm) and far-IR continuum emission with the spectral window setup seamlessly covering a 26.125 GHz frequency range (10.10 < z < 11.14). A total of 7 hr of on-source integration was employed, using four frequency settings to cover the full range (1.7 hr per setting), with 0.″7 angular resolution. No line or continuum is clearly detected, with 5σ upper limits on the line emission of 0.93 mJy beam−1 at 25 km s−1 channel−1 and on the continuum emission of 30 μJy beam−1. We report marginal spectral (at 225 km s−1 resolution) and continuum features (4.1σ and 2.6σ peak signal-to-noise ratio, respectively), within 0.″17 from the JWST position of GHZ1. This spectral feature implies z = 10.38 and needs to be verified with further observations. Assuming that the best estimate of photometric redshift ( z = 10.60 − 0.60 + 0.52 ) is correct, the model of the galaxy’s broadband spectral energy distribution for the 3σ upper limit of the continuum flux from GHZ1 suggests that GHZ1 has a small amount of dust (M d ≲ 104 M ⊙) at a high temperature (T d ≳ 90 K). The 5σ upper limit on the [O iii]88μm line luminosity and the inferred star formation rate of GHZ1 are consistent with the properties of low-metallicity dwarf galaxies. We also report serendipitous clear detections of six continuum sources at the locations of the JWST galaxy counterparts in the field.

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“…A total of 21/ 32 galaxies are identified also with the alternative photometry, reassuring us about the reliability of the population. Of the remaining galaxies, 4 have F115W magnitude fainter than our adopted limit of 22.2, according to the Weaver et al (2023) photometry, 3 have a point-like source that might be affecting the photometry, and 3 are on the cluster main sequence according to the UNCOVER photometry. In contrast, five additional galaxies are "red excess" galaxies according to the UNCOVER photometry; one of these is on our red sequence, and the others are not in our catalog.…”

Section: The Morphological MIX In the Different Environmentsmentioning

confidence: 82%

“…First of all, to test the reliability of the adopted photometry (Paris et al 2023), we perform the same analysis discussed in Section 5.1, using instead the photometry obtained by Weaver et al (2023) in the context of UNCOVER, based on completely independent reduction and extraction algorithms. A total of 21/ 32 galaxies are identified also with the alternative photometry, reassuring us about the reliability of the population.…”

Section: The Morphological MIX In the Different Environmentsmentioning

confidence: 99%

Early Results from GLASS-JWST. XX. Unveiling a Population of “Red Excess” Galaxies in Abell2744 and in the Coeval Field

Vulcani

Treu

Calabró

et al. 2023

ApJL

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We combine JWST/NIRCam imaging and MUSE data to characterize the properties of galaxies in different environmental conditions in the cluster Abell2744 (z = 0.3064) and in its immediate surroundings. We investigate how galaxy colors, morphology, and star-forming fractions depend on wavelength and on different parameterizations of environment. Our most striking result is the discovery of a “red excess” population in F200W−F444W colors in both the cluster regions and the field. These galaxies have normal F115W−F150W colors but are up to 0.8 mag redder than red sequence galaxies in F200W−F444W. They also have rather blue rest-frame B−V colors. Galaxies in the field and at the cluster virial radius are overall characterized by redder colors, but galaxies with the largest color deviations are found in the field and in the cluster core. Several results suggest that mechanisms taking place in these regions might be more effective in producing these colors. Looking at their morphology, many cluster galaxies show signatures consistent with ram pressure stripping, while field galaxies have features resembling interactions and mergers. Our hypothesis is that these galaxies are characterized by dust-enshrouded star formation: a JWST/NIRSpec spectrum for one of the galaxies is dominated by a strong PAH at 3.3 μm, suggestive of dust-obscured star formation. Larger spectroscopic samples are needed to understand whether the color excess is due exclusively to dust-obscured star formation, as well as the role of environment in triggering it.

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The UNCOVER Survey: A first-look HST+JWST catalog of 50,000 galaxies near Abell 2744 and beyond

Cited by 19 publications

References 0 publications

Inferring More from Less: Prospector as a Photometric Redshift Engine in the Era of JWST

Inferring More from Less: Prospector as a Photometric Redshift Engine in the Era of JWST

ALMA Observation of a z ≳ 10 Galaxy Candidate Discovered with JWST

Early Results from GLASS-JWST. XX. Unveiling a Population of “Red Excess” Galaxies in Abell2744 and in the Coeval Field

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