REVIEW 19 cited by
A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
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 ($\Delta\chi^2>4$). We thus carefully apply a secure photo-$z$ selection criterion ($\Delta\chi^2>9$) and conventional color criteria with confirmations of the ERO NIRSpec spectroscopic redshifts, and obtain a total of 23 dropout galaxies at $z\sim9-16$, including two candidates at $z_\mathrm{phot}=16.25_{-0.46}^{+0.24}$ and $16.41_{-0.55}^{+0.66}$. We perform thorough comparisons of dropout galaxies found in our work with recent JWST studies, and conclude that our galaxy sample is reliable enough for statistical analyses. We derive the UV luminosity functions at $z\sim9-16$, and confirm that our UV luminosity functions at $z\sim 9$ and $12$ agree with those determined by other HST and JWST studies. The cosmic star-formation rate density decreases from $z\sim9$ to $12$, and perhaps to $16$, but the densities at $z\sim12-16$ are higher than the constant star formation efficiency model. Interestingly, there are six bright galaxy candidates at $z\sim10-16$ with $M_\mathrm{UV}<-19.5$ mag and $M_*\sim10^{8-9} M_\odot$. Because a majority ($\sim80$\%) of these galaxies show no signatures of AGNs in their morphologies, the high cosmic star-formation rate densities and the existence of these UV-luminous galaxies are explained by no suppression of star-formation by the UV background radiation at the pre-reionization epoch and/or an efficient UV radiation production by a top-heavy IMF with Population III-like star formation.
Forward citations
Cited by 19 Pith papers
-
An emerging baryon cycle in a galaxy 500 million years after the Big Bang
Fine-structure absorption lines in a z=9.3 galaxy yield the first direct electron-density measurement of a high-redshift outflow, giving a mass-loading factor among the highest ever measured.
-
Two Peas in a Pod: The First Confirmed Dual Active Galactic Nucleus within a Green Pea Galaxy System
A compact Green Pea galaxy system hosts two resolved, simultaneously accreting supermassive black holes — the first confirmed dual AGN in such a galaxy.
-
Harvesting primordial black holes from stochastic trees with $\texttt{FOREST}$
A stochastic-branching-tree implementation of inflation, FOREST, computes curvature maps and primordial black hole mass functions with cloud-in-cloud effects included.
-
First Light and Assembly of GalaxieS (FLAGS) I: The JWST/NIRCam Number Counts and IGL as Constraints on Galaxy Formation Models
FLAGS-I delivers the deepest JWST/NIRCam number counts to date, new 2.77 and 4.10 micron IGL constraints, and a model comparison that ranks SC-SAM first.
-
A clear detection of proper motion confirms that the claimed $\mathbf{z\simeq32}$ galaxy candidate, "Capotauro'', is a Y-type brown dwarf
Capotauro, previously a candidate galaxy at z about 32, is confirmed as a Y-type brown dwarf near 730 pc by a 6.2 sigma proper motion measured over 3.5 years.
-
A "Neutrino Fog" For Gravitational Waves: The Stochastic Gravitational Wave Background from Supernova Neutrino Memory
Using 3D supernova simulations, the authors predict that neutrino memory creates a gravitational wave background with Omega_GW around 1e-16 at 0.1 Hz, within reach of future space-based detectors.
-
When galaxies burst II. Implications of enhanced burstiness for the 21-cm Cosmic Dawn signal
Bursty star formation adds a shot-noise-like term to the Cosmic Dawn 21-cm power spectrum, boosting it by factors of a few at the Wouthuysen-Field trough and strongly on small scales at high redshift.
-
Bright Galaxies at Cosmic Dawn: A Cloud-Scale Star Formation Model Unifying Variable SFE, IMFs, and Stochasticity
A cloud-based semi-analytic model shows that a top-heavy stellar initial mass function and a cloud-property-dependent star-formation efficiency, rather than cloud mass or density, most strongly shape the UV luminosity...
-
Assessing the large-scale angular clustering of UNIONS Lyman Break Galaxies via cross-correlations
UNIONS Lyman-break galaxy auto-clustering is unusable at large scales due to imaging systematics, but LBG x CMB-lensing and LBG x quasar cross-spectra are measured robustly, with amplitudes consistent with predictions.
-
Early Galaxies from Rare Inflationary Processes and JWST Observations
Rare Poisson processes during inflation can seed dense regions that collapse into massive galaxies at redshifts where standard cosmology predicts almost none, and JWST could detect them.
-
BEACON: JWST NIRCam Pure-parallel Imaging Survey. I. Survey Design and Initial Results
BEACON's first 19 pure-parallel fields yield 129 galaxy candidates at z>7, 11 at z>10, and zero at z>13, with number densities consistent with earlier JWST and HST surveys.
-
Signatures of Rapidly Rotating Stars with Chemically Homogeneous Evolution in the First Galaxies
Rapidly rotating, chemically homogeneous stars can increase a galaxy's rest-frame UV luminosity by a factor of 3-6 and allow JWST's z~12-16 UV luminosity functions to be matched with less extreme star formation parameters.
-
Deep Spectroscopic Follow-Up of Maisie's Galaxy -- A Typical Galaxy in the Early Universe
Deep JWST spectroscopy of Maisie's Galaxy at z=11.4 reveals moderate star formation, metallicity, and ionization consistent with a typical galaxy on the early star-formation main sequence rather than an extreme source.
-
Probing inflationary features with galaxy ultraviolet luminosity function observables
Galaxy UV luminosity function data at z=6–9 give upper limits on bump-like inflationary features at k≈0.3–20 Mpc^-1, similar to but not stronger than optical-depth constraints.
-
Large-Scale Structure Probes of the Post-Inflationary Axiverse
HST ultraviolet luminosity function data at z=4-10, combined with Lyman-α and CMB data, place leading constraints on subdominant post-inflationary axion dark matter via its white-noise isocurvature perturbations.
-
Dark Secrets of Baryons: Illuminating Dark Matter-Baryon Interactions with JWST
JWST ultraviolet luminosity function data currently provide the strongest upper limits on velocity-dependent (∝v^{-2}) dark matter–proton scattering for sub-GeV dark matter.
-
Influence of supermassive primordial black holes on ultraviolet luminosity of high-redshift galaxies
Fitting a model of supermassive primordial black holes to JWST data at z=11 reproduces the excess of bright galaxies, but the agreement reflects parameter tuning rather than an independent test.
-
Not-quite-primordial black holes seeded by cosmic string loops
Cosmic string loops moving through the early universe can seed halos that collapse into 10^5 solar mass black holes, potentially explaining JWST's little red dots.
-
Gamma-ray bursts reveal the history and faint contributors of cosmic reionization
Long gamma-ray bursts imply a higher cosmic star formation rate density at z>6 than galaxy surveys detect, sufficient to drive reionization with moderate ionizing efficiency and escape fraction, implying a large popul...
Discussion (0). Continue with ORCID to comment.