Search Publications
Low-mass bursty galaxies in JADES efficiently produce ionizing photons and could represent the main drivers of reionization
Maiolino, R.; Sun, F.; Egami, E. +21 more
We use deep imaging from the JWST Advanced Deep Extragalactic Survey (JADES) to study the evolution of the ionizing photon production efficiency, ξion. We estimate ξion for a sample of 677 galaxies at z ~ 4-9 using NIRCam (Near-Infrared Camera) photometry. Specifically, combinations of the medium and wide bands F335M-F356W an…
Enhanced Subkiloparsec-scale Star Formation: Results from a JWST Size Analysis of 341 Galaxies at 5 < z < 14
Stiavelli, Massimo; Treu, Tommaso; Trenti, Michele +7 more
We present a comprehensive search and analysis of high-redshift galaxies in a suite of nine public JWST extragalactic fields taken in Cycle 1, covering a total effective search area of $\sim 358\,{\mathrm{arcmin}}^{2}$ . Through conservative (8σ) photometric selection, we identify 341 galaxies at 5 < z < 14, with 109 having spectroscopic red…
A massive galaxy that formed its stars at z ≈ 11
Papovich, Casey; Kacprzak, Glenn G.; Glazebrook, Karl +15 more
The formation of galaxies by gradual hierarchical co-assembly of baryons and cold dark matter halos is a fundamental paradigm underpinning modern astrophysics1,2 and predicts a strong decline in the number of massive galaxies at early cosmic times3-5. Extremely massive quiescent galaxies (stellar masses of more than 1011…
EIGER. V. Characterizing the Host Galaxies of Luminous Quasars at z ≳ 6
Simcoe, Robert A.; Naidu, Rohan P.; Kashino, Daichi +6 more
We report JWST/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at 5.9 < z < 7.1 in the Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization (EIGER) project. We obtain deep NIRCam imaging in the F115W, F200W, and F356W bands, as well as F356W grism spectroscopy…
Galaxy build-up in the first 1.5 Gyr of cosmic history: insights from the stellar mass function at z 4-9 from JWST NIRCam observations
Pérez-González, Pablo G.; Santini, Paola; Dickinson, Mark +28 more
Combining the public JWST/NIRCam imaging programs CEERS, PRIMER, and JADES, spanning a total area of $\sim 500\, {\rm arcmin}^2$, we obtain a sample of $\gt $30 000 galaxies at $z_{\rm phot}\sim 4\!-\!9$ that allows us to perform a complete, rest-optical-selected census of the galaxy population at $z\gt 3$. Comparing the stellar mass $M_*$ and the…
Between the Extremes: A JWST Spectroscopic Benchmark for High-redshift Galaxies Using ∼500 Confirmed Sources at z ≥ 5
Castellano, Marco; Fontana, Adriano; Pentericci, Laura +6 more
The exceptional spectra of the most luminous z > 10 sources observed so far have challenged our understanding of early galaxy evolution, requiring a new observational benchmark for meaningful interpretation. As such, we construct spectroscopic templates representative of high-redshift, star-forming populations, using 482 confirmed sources at z …
The JWST EXCELS survey: too much, too young, too fast? Ultra-massive quiescent galaxies at 3 < z < 5
Cimatti, A.; Cullen, F.; McLure, R. J. +21 more
We report ultra-deep, medium-resolution spectroscopic observations for four quiescent galaxies with log
EPOCHS VI: the size and shape evolution of galaxies since z 8 with JWST Observations
Conselice, C. J.; Adams, N. J.; Li, Q. +8 more
We present the results of a size and structural analysis of 1395 galaxies at 0.5 ≤ z ≲ 8 with stellar masses log (M*/M⊙)> 9.5 within the James Webb Space Telescope Public CEERS field that overlaps with the Hubble Space Telescope Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey EGS observations. We use GALFIT …
The UV continuum slopes of early star-forming galaxies in JADES
Chevallard, Jacopo; Carniani, Stefano; Bunker, Andrew J. +22 more
The power-law slope of the rest-ultraviolet (UV) continuum (fλ ∝ λβ) is a key metric of early star-forming galaxies, providing one of our only windows into the stellar populations and physical conditions of z ≳ 10 galaxies. Expanding upon previous studies with limited sample sizes, we leverage deep imaging from the JWST Advan…
The Radius of the High-mass Pulsar PSR J0740+6620 with 3.6 yr of NICER Data
Chakrabarty, Deepto; Bogdanov, Slavko; Salmi, Tuomo +14 more
We report an updated analysis of the radius, mass, and heated surface regions of the massive pulsar PSR J0740+6620 using Neutron Star Interior Composition Explorer (NICER) data from 2018 September 21 to 2022 April 21, a substantial increase in data set size compared to previous analyses. Using a tight mass prior from radio-timing measurements and …