The JWST UNCOVER Treasury survey: Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization

Bezanson, Rachel; Labbé, Ivo; Whitaker, Katherine E.; Leja, Joel; Price, Sedona H.; Franx, Marijn; Brammer, Gabriel; Marchesini, Danilo; Zitrin, Adi; Wang, Bingjie; Weaver, John R.; Furtak, Lukas J.; Atek, Hakim; Coe, Dan; Cutler, Sam E.; Dayal, Pratika; Dokkum, Pieter van; Feldmann, Robert; Schreiber, N. Förster; Fujimoto, Seiji; Geha, Marla; 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; Pan, Richard; Papovich, Casey; Setton, David J.; Shapley, Alice E.; Smit, Renske; Stefanon, Mauro; Taylor, Edward N.; Williams, Christina C.

doi:10.48550/arxiv.2212.04026

Cited by 62 publications

(83 citation statements)

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“…9,10,11,12,and 13) and to study the intrinsic physical proprieties of the lensed background sources. We finally note that, as is happening for other clusters recently observed by the JWST (e.g., Treu et al 2022;Bezanson et al 2022;Windhorst et al 2023), the presented lens model and its future refinements will have a fundamental role in the study of lensed high-redshift sources that will soon be observed or discovered by the JWST (e.g., Vanzella et al 2022;Roberts-Borsani et al 2022;Castellano et al 2022).…”

Section: Discussionmentioning

confidence: 58%

A state-of-the-art strong-lensing model of MACS J0416.1−2403 with the largest sample of spectroscopic multiple images

Bergamini¹,

Grillo²,

Rosati³

et al. 2023

A&A

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The combination of multi-band imaging from the Hubble Space Telescope with Multi-Unit Spectroscopic Explorer integral field spectroscopy, obtained at the Very Large Telescope, has recently driven remarkable progress in strong-lensing (SL) modeling of galaxy clusters. From a few tens of multiple images with photometric redshifts per cluster, a new generation of high-precision SL models have recently been developed by exploiting in some cases over a hundred spectroscopically confirmed multiple images and cluster member galaxies. A further step forward is expected with James Webb Space Telescope observations of SL clusters (from hundreds of multiple images to possibly a thousand). In this context, we present a new state-of-the-art SL model of the galaxy cluster MACS J0416.1−2403, utilizing 237 spectroscopically confirmed multiple images, which is the largest sample of secure multiplylensed sources utilized to date. In addition, this model incorporates stellar kinematics information of 64 cluster galaxies and the hot-gas mass distribution of the cluster, determined from Chandra X-ray observations. The observed positions of the many multiple images are reproduced with a remarkable average accuracy of 0.43 ′′ . To further assess the reliability of this lens model and to highlight the improvement over previously published models, we show the extended surface brightness reconstruction of several lensed galaxies through a newly developed forward modeling software. The comparison with other SL models of the same cluster demonstrates that this new model is better able to accurately reproduce the positions, shapes, and fluxes of the observed multiple images. In addition to a robust characterization of the total mass distribution of the cluster, our model can provide accurate and precise magnification maps that are key to studying the intrinsic physical properties of faint high-redshift lensed sources. The model is made publicly available through our newly developed Strong Lensing Online Tool (SLOT); thanks to a simple graphical interface SLOT allows astronomers (including lensing non-experts) to take full advantage of the predictive power of the model, including statistical uncertainties on the relevant quantities associated with the multiply-lensed sources.

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Section: Discussionmentioning

confidence: 58%

A state-of-the-art strong-lensing model of MACS J0416.1−2403 with the largest sample of spectroscopic multiple images

Bergamini¹,

Grillo²,

Rosati³

et al. 2023

A&A

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show abstract

“…This work is thus a timely addition to address the many challenges being put forth by JWST surveys. In the near future, we plan to apply Prospector-β to UNCOVER-an ultradeep Cycle 1 JWST survey targeting first-light galaxies (Bezanson et al 2022). The data will be an even more stringent test on our model, and will provide a path for future improvements.…”

Section: Discussionmentioning

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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“…We homogeneously processed all the publicly available JWST imaging obtained with the Near Infrared Camera (NIRCam) and Near Infrared Imager and Slitless Spectrograph (NIRISS), in the A2744 field. These include the data from (1) Through the Looking GLASS: A JWST Exploration of Galaxy Formation and Evolution from Cosmic Dawn to Present Day (GLASS; ERS-1324; PI: T. Treu), (2) The JWST UNCOVER Treasury survey: Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (GO-2561; UNCOVER; PIs: I. Labbe, R. Bezanson et al 2022), and (3) DD 2756 (PI: W. Chen). The images have all been reduced with the GRIZLI pipeline (Brammer & Matharu 2021).…”

Section: Jwst Imaging Data Reductionmentioning

confidence: 99%

“…The HST-dark galaxy A is unambiguously detected and resolved with JWST though, an important question that remains is whether JWST can detect (see a similar discussion for HST in Dey et al 1999) similarly dusty objects that are unlensed at higher redshift, especially the JWST prospects on dusty galaxies in the Epoch of Reionization (z > 6). To answer this, we compare the best-fit SED model of galaxy A at different redshifts with the depths of major JWST surveys, including UNCOVER (PIs: I. Labbe, R. Bezanson et al 2022), CEERS (PI: S. Finkelstein; Bagley et al 2022) and COSMOS-Web (PIs: J. Kartaltepe, C. Casey et al 2022). At higher redshift, galaxies are less massive and more compact given the mass-size relation (e.g., see van der Wel et al 2014).…”

Section: Detectability At Higher Zmentioning

confidence: 99%

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

Kokorev

Jin

Magdis

et al. 2023

ApJL

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Using the novel James Webb Space Telescope (JWST)/NIRCam observations in the A2744 field, we present a first spatially resolved overview of a Hubble Space Telescope (HST)-dark galaxy, spectroscopically confirmed at z = 2.58 with magnification μ ≈ 1.9. While being largely invisible at ∼1 μm with NIRCam, except for sparse clumpy substructures, the object is well detected and resolved in the long-wavelength bands with a spiral shape clearly visible in F277W. By combining ancillary Atacama Large Millimeter/submillimeter Array (ALMA) and Herschel data, we infer that this object is an edge-on dusty spiral with an intrinsic stellar mass log (M */M ⊙) ∼ 11.3 and a dust-obscured star formation rate ∼300 M ⊙ yr−1. A massive quiescent galaxy (log (M */M ⊙) ∼ 10.8) with tidal features lies 2.″0 away (r ∼ 9 kpc), at a consistent redshift as inferred by JWST photometry, indicating a potential major merger. The dusty spiral lies on the main sequence of star formation, and shows high dust attenuation in the optical (3 < A V < 4.5). In the far-infrared, its integrated dust spectral energy distribution is optically thick up to λ 0 ∼ 500 μm, further supporting the extremely dusty nature. Spatially resolved analysis of the HST-dark galaxy reveals a largely uniform A V ∼ 4 area spanning ∼57 kpc2, which spatially matches to the ALMA 1 mm continuum emission. Accounting for the surface brightness dimming and the depths of current JWST surveys, unlensed analogs of the HST-dark galaxy at z > 4 would be only detectable in F356W and F444W in an UNCOVER-like survey, and become totally JWST-dark at z ∼ 6. This suggests that detecting highly attenuated galaxies in the Epoch of Reionization might be a challenging task for JWST.

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The JWST UNCOVER Treasury survey: Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization

Cited by 62 publications

References 0 publications

A state-of-the-art strong-lensing model of MACS J0416.1−2403 with the largest sample of spectroscopic multiple images

A state-of-the-art strong-lensing model of MACS J0416.1−2403 with the largest sample of spectroscopic multiple images

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

JWST Insight into a Lensed HST-dark Galaxy and Its Quiescent Companion at z = 2.58

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