JWST & the Early Universe
High-redshift galaxy discoveries, little red dots, early supermassive black holes and reionization as seen by JWST.
Most influential
- A Comprehensive Study of Galaxies at z ∼ 9–16 Found in the Early JWST Data: Ultraviolet Luminosity Functions and Cosmic Star Formation History at the Pre-reionization Epoch
We conduct a comprehensive study on dropout galaxy candidates at $z\sim9-16$ using the first 90 arcmin$^2$ JWST/NIRCam images taken by the early release observations (ERO) and early release science (ERS) programs. With the JWST simulation images, we find that a number of foreground interlopers are selected with a weak photo-$z$ determination ($Δχ^2>4$). We t…
Article543 citationsarXiv:2208.01612doi:10.3847/1538-4365/acaaa9 - CEERS Key Paper. I. An Early Look into the First 500 Myr of Galaxy Formation with JWST
We present an investigation into the first 500 Myr of galaxy evolution from the Cosmic Evolution Early Release Science (CEERS) survey. CEERS, one of 13 JWST ERS programs, targets galaxy formation from z~0.5 to z>10 using several imaging and spectroscopic modes. We make use of the first epoch of CEERS NIRCam imaging, spanning 35.5 sq. arcmin, to search for ca…
Article538 citationsarXiv:2211.05792doi:10.3847/2041-8213/acade4 - Two Remarkably Luminous Galaxy Candidates at z ≈ 10–12 Revealed by JWST
The first few hundred Myrs at $z>10$ mark the last major uncharted epoch in the history of the Universe, where only a single galaxy (GNz11 at $z\approx11$) is currently spectroscopically confirmed. Here we present a search for luminous $z>10$ galaxies with $JWST$/NIRCam photometry spanning $\approx1-5μ$m and covering 49 arcmin$^{2}$ from the public Early Rel…
Article438 citationsarXiv:2207.09434doi:10.3847/2041-8213/ac9b22 - The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 – 15 from deep JWST and ground-based near-infrared imaging
We reduce and analyse the available James Webb Space Telescope (JWST) ERO and ERS NIRCam imaging (SMACS0723, GLASS, CEERS) in combination with the latest deep ground-based near-infrared imaging in the COSMOS field (provided by UltraVISTA DR5) to produce a new measurement of the evolving galaxy UV luminosity function (LF) over the redshift range $z = 8 - 15$.…
Article435 citationsarXiv:2207.12356doi:10.1093/mnras/stac3472 - A CEERS Discovery of an Accreting Supermassive Black Hole 570 Myr after the Big Bang: Identifying a Progenitor of Massive z > 6 Quasars
Abstract We report the discovery of an accreting supermassive black hole at z = 8.679. This galaxy, denoted here as CEERS_1019, was previously discovered as a Ly α -break galaxy by Hubble with a Ly α redshift from Keck. As part of the Cosmic Evolution Early Release Science (CEERS) survey, we have observed this source with JWST/NIRSpec, MIRI, NIRCam, and NIRC…
Abstract excerpt by Rebecca L. Larson et al., CC-BY, https://doi.org/10.3847/2041-8213/ace619; truncated.
Article365 citationsdoi:10.3847/2041-8213/ace619 - Stress testing ΛCDM with high-redshift galaxy candidates
Early data from JWST have revealed a bevy of high-redshift galaxy candidates with unexpectedly high stellar masses. An immediate concern is the consistency of these candidates with galaxy formation in the standard cosmological model. In the $Λ$CDM paradigm, the stellar mass ($M_\star$) of a galaxy is limited by the available baryonic reservoir of its host da…
Article329 citationsarXiv:2208.01611doi:10.1038/s41550-023-01937-7 - Early Results from GLASS-JWST. III. Galaxy Candidates at z ∼9–15*
We present the results of a first search for galaxy candidates at z$\sim$9--15 on deep seven-bands NIRCam imaging acquired as part of the GLASS-JWST Early Release Science Program on a flanking field of the Frontier Fields cluster A2744. Candidates are selected via two different renditions of the Lyman-break technique, isolating objects at z$\sim$9-11, and z$…
Article340 citationsarXiv:2207.09436doi:10.3847/2041-8213/ac94d0 - GA-NIFS: A massive black hole in a low-metallicity AGN at z ∼ 5.55 revealed by JWST/NIRSpec IFS
We present JWST/NIRSpec Integral Field Spectrograph rest-frame optical data of the compact $z=5.55$ galaxy GS_3073. Its prominent broad components in several hydrogen and helium lines (while absent in the forbidden lines), and the detection of a large equivalent width of He II$\lambda4686$, EW(He II) ~ 20A, unambiguously identify it as an active galactic nuc…
Article303 citationsarXiv:2302.06647doi:10.1051/0004-6361/202346137 - Efficient formation of massive galaxies at cosmic dawn by feedback-free starbursts
JWST observations indicate a surprising excess of luminous galaxies at $z\sim 10$ and above, consistent with efficient conversion of the accreted gas into stars, unlike the suppression of star formation by feedback at later times. We show that the high densities and low metallicities at this epoch {\it guarantee} a high star-formation efficiency (SFE) in the…
Article290 citationsarXiv:2303.04827doi:10.1093/mnras/stad1557 - The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z ∼ 8
We analyse the chemical properties of three z~8 galaxies behind the galaxy cluster SMACS J0723.3-7327, observed as part of the Early Release Observations programme of the James Webb Space Telescope (JWST). Exploiting [O III]4363 auroral line detections in NIRSpec spectra, we robustly apply the direct Te method for the very first time at such high redshift, m…
Article284 citationsarXiv:2207.12375doi:10.1093/mnras/stac2737 - The Rise of Faint, Red Active Galactic Nuclei at z > 4: A Sample of Little Red Dots in the JWST Extragalactic Legacy Fields
Abstract We present a sample of 341 “little red dots” (LRDs) spanning the redshift range z ∼ 2–11 using data from the CEERS, PRIMER, JADES, UNCOVER, and NGDEEP surveys. Unlike past use of color indices to identify LRDs, we employ continuum slope fitting using shifting bandpasses to sample the same rest-frame emission blueward and redward of the Balmer break.…
Abstract excerpt by Dale D. Kocevski et al., CC-BY, https://doi.org/10.3847/1538-4357/adbc7d; truncated.
Article200 citationsdoi:10.3847/1538-4357/adbc7d - Discovery and properties of ultra-high redshift galaxies (9 < z < 12) in the JWST ERO SMACS 0723 Field
We present a reduction and analysis of the \textit{James Webb Space Telescope} (JWST) SMACS~0723 field using new post-launch calibrations to conduct a search for ultra-high-redshift galaxies ($z > 9$) present within the Epoch of Reionisation. We conduct this search by modelling photometric redshifts in several ways for all sources and by applying conservativ…
Article273 citationsarXiv:2207.11217doi:10.1093/mnras/stac3347 - JADES: Insights into the low-mass end of the mass–metallicity–SFR relation at 3 < z < 10 from deep JWST/NIRSpec spectroscopy
We analysed the gas-phase metallicity properties of a sample of low-stellar-mass (log M ⋆ / M ⊙ ≲ 9) galaxies at 3 < z < 10 observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with more massive galaxies at similar redshifts from other programmes, we study the scaling relations between stellar mass ( M …
Abstract excerpt by Mirko Curti et al., CC-BY, https://doi.org/10.1051/0004-6361/202346698; truncated.
Article224 citationsdoi:10.1051/0004-6361/202346698 - THE SPECTRAL EVOLUTION OF THE FIRST GALAXIES. I.JAMES WEBB SPACE TELESCOPEDETECTION LIMITS AND COLOR CRITERIA FOR POPULATION III GALAXIES
The James Webb Space Telescope (JWST) is expected to revolutionize our understanding of the high-redshift Universe, and may be able to test the prediction that the first, chemically pristine (population III) stars formed with very high characteristic masses. Since isolated population III stars are likely to be beyond the reach of JWST, small population III g…
Article324 citationsarXiv:1105.0921doi:10.1088/0004-637x/740/1/13 - The Complete CEERS Early Universe Galaxy Sample: A Surprisingly Slow Evolution of the Space Density of Bright Galaxies at z ∼ 8.5–14.5
We present a sample of 88 candidate z~8.5-14.5 galaxies selected from the completed NIRCam imaging from the Cosmic Evolution Early Release Science (CEERS) survey. These data cover ~90 arcmin^2 (10 NIRCam pointings) in six broad-band and one medium-band imaging filter. With this sample we confirm at higher confidence early JWST conclusions that bright galaxie…
Article215 citationsarXiv:2311.04279doi:10.3847/2041-8213/ad4495
Newest work
- Cosmic birefringence tomography with radio galaxies I: Testing birefringence solutions to the CMB-BAO tensionPreprintarXiv:2610.39449
- Dust growth in the early Universe: insight from the NewCluster spin-off simulationPreprintarXiv:2610.39683
- Feeding or Fleeing: The Impact of Enhanced Early Black Hole Growth on Circumgalactic Clumps at $z > 6$PreprintarXiv:2610.39692
- At the EDGES of MADness: phenomenology of relic millicharged atomic dark matterPreprintarXiv:2610.40064
- Toward a Complete Interpretation of Global 21 cm Absorption Signals Using the Radio CMBPreprintarXiv:2610.40300
- PRISMS GHZ8: Evidence for a Young Burst and Potential Merger Activity at z=10.23PreprintarXiv:2610.40633
- A Collimated Protostellar Outflow Likely Driven by Jet and Reshaped by Environment in the Sagittarius C Cloud of the Central Molecular ZonePreprintarXiv:2610.36573
- Excitation and Destruction of Small Polycyclic Aromatic Hydrocarbons by the Luminous Seyfert Nucleus of NGC 4151PreprintarXiv:2610.36651
- A Point-source Catalogue from Direction-dependent Calibrated 21CMA ImagesPreprintarXiv:2610.37368
- JWST/MIRI Observations of Amorphous Silicates in Interstellar Comet 3I/ATLASPreprintarXiv:2610.37540