Are $JWST$/NIRCam color gradients in the lensed $z=2.3$ dusty star-forming galaxy $El~Anzuelo$ due to central dust attenuation or inside-out galaxy growth?

Kamieneski, Patrick; Frye, Brenda; Pascale, Massimo; Cohen, Seth H.; Windhorst, Rogier A.; Jansen, Rolf A.; Yun, Min S.; Cheng, Cheng; Summers, Jake S.; Carleton, Timothy; Harrington, Kevin; Diego, J. M.; Yan, Haojing; Koekemoer, Anton M.; Willmer, Christopher N. A.; Petric, Andreea; Furtak, Lukas J.; Foo, Nicholas; Conselice, Christopher J.; Coe, Dan; Driver, Simon P.; Grogin, Norman A.; Marshall, Madeline A.; Pirzkal, Nor; Robotham, Aaron S. G.; Ryan, Russell E.; Tompkins, Scott

doi:10.48550/arxiv.2303.05054

Cited by 3 publications

(2 citation statements)

References 163 publications

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“…The lensed galaxy constraints were introduced in a multistep process, starting with the 23 image systems with spectroscopic redshifts (Caminha et al 2022). We also added El Anzuelo, which is a partial Einstein ring and ALMA source for which CO(3-2) line emission is detected at z = 2.291 (Diego et al 2023;Kamieneski et al 2023). The initial lens model was based on these 24 spectroscopically confirmed systems with their redshifts fixed.…”

Section: Ltm Approachmentioning

confidence: 99%

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

Frye

Pascale

Foo

et al. 2023

ApJ

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The massive galaxy cluster El Gordo (z = 0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were obtained in the “Prime Extragalactic Areas for Reionization and Lensing Science” (“PEARLS”) program. Point-spread function–matched photometry across Hubble Space Telescope and NIRCam filters supplies new photometric redshifts. A new light-traces-mass lens model based on 56 image multiplicities identifies the two mass peaks and yields a mass estimate within 500 kpc of (7.0 ± 0.30) × 1014 M ⊙. A search for substructure in the 140 cluster members with spectroscopic redshifts confirms the two main mass components. The southeastern mass peak that contains the brightest cluster galaxy is more tightly bound than the northwestern one. The virial mass within 1.7 Mpc is (5.1 ± 0.60)×1014 M ⊙, lower than the lensing mass. A significant transverse velocity component could mean the virial mass is underestimated. We contribute one new member to the previously known z = 4.32 galaxy group. Intrinsic (delensed) positions of the five secure group members span a physical extent of ∼60 kpc. 13 additional candidates selected by spectroscopic/photometric constraints are small and faint, with a mean intrinsic luminosity ∼2.2 mag fainter than L *. NIRCam imaging admits a fairly wide range of brightnesses and morphologies for the group members, suggesting a more diverse galaxy population in this galaxy overdensity.

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Section: Ltm Approachmentioning

confidence: 99%

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

Frye

Pascale

Foo

et al. 2023

ApJ

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“…A fixed n = 1 was therefore adopted to simplify comparison of the derived sizes between the bands. This showed a constant effective radius with wavelength of R e F444W ∼3.8 ± 0.4 kpc after correcting for lensing (see also Chen et al 2022;Kamieneski et al 2023). The similar analysis of 850.2 yielded n ∼ 1.9 ± 0.1 in F444W, with higher values in the bluer bands, although a combination of a de Vauncoleurs (Sérsic n = 4) and an n = 1 Sérsic did a better job of reproducing the asymmetric, extended emission in the source.…”

Section: Morphologies and Structuresmentioning

confidence: 92%

Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST

Smail,

Dudzevičiūtė,

Gurwell

et al. 2023

ApJ

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We present a multiwavelength analysis using the Submillimeter Array (SMA), James Clerk Maxwell Telescope, NOEMA, JWST, the Hubble Space Telescope (HST), and the Spitzer Space Telescope of two dusty strongly star-forming galaxies, 850.1 and 850.2, seen through the massive cluster lens A 1489. These SMA-located sources both lie at z = 4.26 and have bright dust continuum emission, but 850.2 is a UV-detected Lyman-break galaxy, while 850.1 is undetected at ≲ 2 μm, even with deep JWST/NIRCam observations. We investigate their stellar, interstellar medium, and dynamical properties, including a pixel-level spectral energy distribution analysis to derive subkiloparsec-resolution stellar-mass and A V maps. We find that 850.1 is one of the most massive and highly obscured, A V ∼ 5, galaxies known at z > 4 with M * ∼1011.8 M ⊙ (likely forming at z > 6), and 850.2 is one of the least massive and least obscured, A V ∼ 1, members of the z > 4 dusty star-forming population. The diversity of these two dust-mass-selected galaxies illustrates the incompleteness of galaxy surveys at z ≳ 3–4 based on imaging at ≲ 2 μm, the longest wavelengths feasible from HST or the ground. The resolved mass map of 850.1 shows a compact stellar-mass distribution, R e mass ∼1 kpc, but its expected evolution means that it matches both the properties of massive, quiescent galaxies at z ∼ 1.5 and ultramassive early-type galaxies at z ∼ 0. We suggest that 850.1 is the central galaxy of a group in which 850.2 is a satellite that will likely merge in the near future. The stellar morphology of 850.1 shows arms and a linear bar feature that we link to the active dynamical environment it resides within.

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Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observations

Borsato,

Marchetti,

Negrello

et al. 2023

Monthly Notices of the Royal Astronomical Society

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We have carried out HST snapshot observations at 1.1 μm of 281 candidate strongly lensed galaxies identified in the wide-area extragalactic surveys conducted with the Herschel space observatory. Our candidates comprise systems with flux densities at 500 μm S500 ≥ 80 mJy. We model and subtract the surface brightness distribution for 130 systems, where we identify a candidate for the foreground lens candidate. After combining visual inspection, archival high-resolution observations, and lens subtraction, we divide the systems into different classes according to their lensing likelihood. We confirm 65 systems to be lensed. Of these, 30 are new discoveries. We successfully perform lens modelling and source reconstruction on 23 systems, where the foreground lenses are isolated galaxies and the background sources are detected in the HST images. All the systems are successfully modelled as a singular isothermal ellipsoid. The Einstein radii of the lenses and the magnifications of the background sources are consistent with previous studies. However, the background source circularised radii (between 0.34 kpc and 1.30 kpc) are ∼3 times smaller than the ones measured in the sub-mm/mm for a similarly selected and partially overlapping sample. We compare our lenses with those in the SLACS survey, confirming that our lens-independent selection is more effective at picking up fainter and diffuse galaxies and group lenses. This sample represents the first step towards characterising the near-IR properties and stellar masses of the gravitationally lensed dusty star-forming galaxies.

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Are $JWST$/NIRCam color gradients in the lensed $z=2.3$ dusty star-forming galaxy $El~Anzuelo$ due to central dust attenuation or inside-out galaxy growth?

Cited by 3 publications

References 163 publications

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies

Hidden Giants in JWST's PEARLS: An Ultramassive z = 4.26 Submillimeter Galaxy that Is Invisible to HST

Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observations

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