The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 – 15 from deep <i>JWST</i> and ground-based near-infrared imaging

Donnan, C T; McLeod, D. J.; Dunlop, James; McLure, R. J.; Carnall, A. C.; Begley, R.; Cullen, F.; Hamadouche, M. L.; Bowler, R. A. A.; Magee, D.; McCracken, H. J.; Milvang-Jensen, B.; Moneti, A.; Targett, T. A.

doi:10.1093/mnras/stac3472

Cited by 264 publications

(235 citation statements)

References 61 publications

Supporting

Mentioning

215

Contrasting

Order By: Relevance

“…The dropout nature of this source satisfies some of the color criteria to identify z > 10 galaxy candidates. Indeed, it satisfies the criterion of m 150W − m 200W > 0.8 used in Yan et al (2023), and some (but not all) of the criteria used in Donnan et al (2023), with a 2σ nondetection in F115W and F150W, and >3σ detections in redder filters (see Figure 2 and Table 1). However, the identification of this source as a DSFG calls into question such a very high-redshift scenario, given that the highest-redshift dust continuum detections ever reported are at z ∼ 7-8 (Laporte et al 2017;Strandet et al 2017;Marrone et al 2018;Tamura et al 2019;Inami et al 2022).…”

Section: A Jwst/nircam Dropout: a Dsfg At Redshift Fivementioning

confidence: 83%

“…The SCUBA-2 observations from Zavala et al (2017) partially overlap with the CEERS NIRCam survey and thus can be used to look for dust continuum emission around z > 10 candidates in the field. Here we focus on two recently reported high-redshift candidates: CEERS-93316 reported to be at z ≈ 16.7 (Donnan et al 2023) and Maisie's galaxy at z ≈ 11.8 (Finkelstein et al 2022a).…”

Section: Searching For Dsfg Contaminants In High-redshift Lbgmentioning

confidence: 99%

“…In the first few days after the release of the first JWST observations, an increasing number of samples of LBG candidates at z  10 were identified (Adams et al 2023;Atek et al 2023;Castellano et al 2022;Donnan et al 2023;Finkelstein et al 2022a;Harikane et al 2022;Naidu et al 2022;Yan et al 2023). The abundance and masses of these sources start to be in tension with the predictions from most galaxy formation models (Boylan-Kolchin 2022; Finkelstein et al 2022a;Lovell et al 2023).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Zavala

Buat

Casey

et al. 2023

ApJL

View full text Add to dashboard Cite

Lyman-break galaxy (LBG) candidates at z ≳ 10 are rapidly being identified in James Webb Space Telescope (JWST)/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources are expected to drop out in the bluer filters while being well detected in redder filters. However, here we show that dust-enshrouded star-forming galaxies at lower redshifts (z ≲ 7) may also mimic the near-infrared (near-IR) colors of z > 10 LBGs, representing potential contaminants in LBG candidate samples. First, we analyze CEERS-DSFG-1, a NIRCam dropout undetected in the F115W and F150W filters but detected at longer wavelengths. Combining the JWST data with (sub)millimeter constraints, including deep NOEMA interferometric observations, we show that this source is a dusty star-forming galaxy (DSFG) at z ≈ 5.1. We also present a tentative 2.6σ SCUBA-2 detection at 850 μm around a recently identified z ≈ 16 LBG candidate in the same field and show that, if the emission is real and associated with this candidate, the available photometry is consistent with a z ∼ 5 dusty galaxy with strong nebular emission lines despite its blue near-IR colors. Further observations on this candidate are imperative to mitigate the low confidence of this tentative submillimeter emission and its positional uncertainty. Our analysis shows that robust (sub)millimeter detections of NIRCam dropout galaxies likely imply z ∼ 4–6 redshift solutions, where the observed near-IR break would be the result of a strong rest-frame optical Balmer break combined with high dust attenuation and strong nebular line emission, rather than the rest-frame UV Lyman break. This provides evidence that DSFGs may contaminate searches for ultra-high redshift LBG candidates from JWST observations.

show abstract

Section: A Jwst/nircam Dropout: a Dsfg At Redshift Fivementioning

confidence: 83%

Section: Searching For Dsfg Contaminants In High-redshift Lbgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Zavala

Buat

Casey

et al. 2023

ApJL

View full text Add to dashboard Cite

show abstract

“…The 6.5 m space observatory is expected to be a game changer in the field of extragalactic observations. Numerous papers have claimed the first detection of ultra high-redshift galaxies at z  10, waiting for spectroscopic confirmation (e.g., Adams et al 2023;Castellano et al 2022;Donnan et al 2023;Finkelstein et al 2022aFinkelstein et al , 2022bHarikane et al 2022b;Naidu et al 2022). Likewise, the superb sensitivity of JWST may also enable us to witness rapidly accreting seed BHs far beyond the current samples of high-redshift AGNs.…”

Section: Introductionmentioning

confidence: 99%

A Candidate for the Least-massive Black Hole in the First 1.1 Billion Years of the Universe

Onoue¹,

Inayoshi²,

Ding³

et al. 2023

ApJL

View full text Add to dashboard Cite

We report a candidate of a low-luminosity active galactic nucleus (AGN) at z = 5 that was selected from the first near-infrared images of the JWST CEERS project. This source, named CEERS-AGN-z5-1 at absolute 1450 Å magnitude M 1450 = −19.5 ± 0.3, was found via a visual selection of compact sources from a catalog of Lyman break galaxies at z > 4, taking advantage of the superb spatial resolution of the JWST/NIRCam images. The 20 photometric data available from CFHT, Hubble Space Telescope, Spitzer, and JWST suggest that the continuum shape of this source is reminiscent of that for an unobscured AGN, and there is a clear color excess in the filters where the redshifted Hβ+[O iii] and Hα are covered. The estimated line luminosity is L Hβ+[O III] = 1043.0 erg s−1 and L Hα = 1042.9 erg s−1 with the corresponding rest-frame equivalent width EWHβ+[O III] = 1100 Å and EWHα = 1600 Å, respectively. Our spectral energy distribution fitting analysis favors the scenario that this object is either a strong broad-line emitter or even a super-Eddington accreting black hole (BH), although a possibility of an extremely young galaxy with moderate dust attenuation is not completely ruled out. The bolometric luminosity, L bol = 2.5 ± 0.3 × 1044 erg s−1, is consistent with those of z < 0.35 broad-line AGNs with M BH ∼ 106 M ⊙ accreting at the Eddington limit. This new AGN population in the first 1.1 billion years of the universe may close the gap between the observed BH mass range at high redshift and that of BH seeds. Spectroscopic confirmation is awaited to secure the redshift and its AGN nature.

show abstract

“…Among the candidates reported by Castellano et al (2022), there is also a very bright object at z ph = 12.3 in GLASS with F444W magnitude of 25.88. In CEERS, Donnan et al (2023) found a candidate at z ph = 16.74 that has an F200W magnitude of 26.46. All such objects, if at the high redshifts suggested, would correspond to M UV  −21.5 to −24, a regime where no previous studies had suggested finding any galaxies over such a small area as a few NIRCam pointings.…”

Section: Introductionmentioning

confidence: 99%

JWST's PEARLS: Bright 1.5–2.0 μm Dropouts in the Spitzer/IRAC Dark Field

Yan

Cohen

Windhorst

et al. 2022

ApJL

View full text Add to dashboard Cite

Using the first epoch of four-band NIRCam observations obtained by the James Webb Space Telescope (JWST) Prime Extragalactic Areas for Reionization and Lensing Science Program in the Spitzer IRAC Dark Field, we search for F150W and F200W dropouts. In 14.2 arcmin2, we have found eight F150W dropouts and eight F200W dropouts, all brighter than 27.5 mag (the brightest being ∼24 mag) in the band to the red side of the break. As they are detected in multiple bands, these must be real objects. Their nature, however, is unclear, and characterizing their properties is important for realizing the full potential of JWST. If the observed color decrements are due to the Lyman break, these objects should be at z ≳ 11.7 and z ≳ 15.4, respectively. The color diagnostics show that at least four F150W dropouts are far away from the usual contaminators encountered in dropout searches (red galaxies at much lower redshifts or brown dwarf stars). While the diagnostics of the F200W dropouts are less certain due to the limited number of passbands, at least one of them is likely not a known type of contaminant, and the rest are consistent with either high-redshift galaxies with evolved stellar populations or old galaxies at z ≈ 3–8. If a significant fraction of our dropouts are indeed at z ≳ 12, we have to face the severe problem of explaining their high luminosities and number densities. Spectroscopic identifications of such objects are urgently needed.

show abstract

The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 – 15 from deep JWST and ground-based near-infrared imaging

Cited by 264 publications

References 61 publications

Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations

A Candidate for the Least-massive Black Hole in the First 1.1 Billion Years of the Universe

JWST's PEARLS: Bright 1.5–2.0 μm Dropouts in the Spitzer/IRAC Dark Field

Contact Info

Product

Resources

About