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The Galaxies Missed by Hubble and ALMA: The Contribution of Extremely Red Galaxies to the Cosmic Census at 3 < z < 8
Pérez-González, Pablo G.; Maseda, Michael V.; Carniani, Stefano +35 more
Using deep JWST imaging from JADES, JEMS, and SMILES, we characterize optically faint and extremely red galaxies at z > 3 that were previously missing from galaxy census estimates. The data indicate the existence of abundant, dusty, and poststarburst-like galaxies down to 108 M ⊙, below the sensitivity limit of Spitzer an…
Ionised gas kinematics and dynamical masses of z ≳ 6 galaxies from JADES/NIRSpec high-resolution spectroscopy
Charlot, Stéphane; Chevallard, Jacopo; Maseda, Michael V. +28 more
We explore the kinematic gas properties of six 5.5 < z < 7.4 galaxies in the JWST Advanced Deep Extragalactic Survey (JADES), using high-resolution JWST/NIRSpec multi-object spectroscopy of the rest-frame optical emission lines [OIII] and Hα. The objects are small and of low stellar mass (∼1 kpc; M* ∼ 107 − 9 M⊙
An Updated Mass-Radius Analysis of the 2017-2018 NICER Data Set of PSR J0030+0451
Chakrabarty, Deepto; Bogdanov, Slavko; Salmi, Tuomo +12 more
In 2019 the NICER collaboration published the first mass and radius inferred for PSR J0030+0451, thanks to NICER observations, and consequent constraints on the equation of state characterizing dense matter. Two independent analyses found a mass of ~1.3-1.4 M ⊙ and a radius of ~13 km. They also both found that the hot spots were all loc…
The UNCOVER Survey: A First-look HST + JWST Catalog of 60,000 Galaxies near A2744 and beyond
Papovich, Casey; Maseda, Michael V.; Franx, Marijn +43 more
In 2022 November, the James Webb Space Telescope (JWST) returned deep near-infrared images of A2744-a powerful lensing cluster capable of magnifying distant, incipient galaxies beyond it. Together with existing Hubble Space Telescope (HST) imaging, this publicly available data set opens a fundamentally new discovery space to understand the remaini…
JWST NIRSpec Spectroscopy of the Triply Lensed z = 10.17 Galaxy MACS0647–JD
Hutchison, Taylor A.; Larson, Rebecca L.; Wilkins, Stephen M. +38 more
We present JWST/NIRSpec prism spectroscopy of MACS0647‑JD, a triply lensed z ∼ 11 candidate discovered in Hubble Space Telescope imaging and spatially resolved by JWST imaging into two components, A and B. Spectroscopy of component A yields a spectroscopic redshift z = 10.17 based on seven detected emission lines: C III] λ λ1907, 1909, [O II] λ372…
JWST PRIMER: a new multifield determination of the evolving galaxy UV luminosity function at redshifts z ≃ 9 - 15
Bowler, R. A. A.; Cullen, F.; McLure, R. J. +18 more
We present a new determination of the evolving galaxy ultraviolet (UV) luminosity function (LF) over the redshift range
A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437–4715
Remillard, Ronald A.; Bogdanov, Slavko; Salmi, Tuomo +17 more
We report Bayesian inference of the mass, radius, and hot X-ray emitting region properties—using data from the Neutron Star Interior Composition ExploreR (NICER)—for the brightest rotation-powered millisecond X-ray pulsar, PSR J0437‑4715. Our modeling is conditional on informative tight priors on mass, distance, and binary inclination obtained fro…
Metal-poor star formation at z > 6 with JWST: new insight into hard radiation fields and nitrogen enrichment on 20 pc scales
Charlot, Stéphane; Chevallard, Jacopo; Maseda, Michael V. +11 more
Nearly a decade ago, we began to see indications that reionization-era galaxies power hard radiation fields rarely seen at lower redshift. Most striking were detections of nebular C IV emission in what appeared to be typical low-mass galaxies, requiring an ample supply of 48 eV photons to triply ionize carbon. We have obtained deep JWST/NIRSpec R …
Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang
Mahler, Guillaume; Fujimoto, Seiji; Inoue, Akio K. +25 more
The Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift z ≈ 10.2 (ref. 1). However, it is an intrinsically ultraviolet faint galaxy, in the range of those now thought to drive the reionization of the Universe2–4. Hitherto the smallest features resolved in a galaxy at a comparable redshift…
COSMOS-Web: Intrinsically Luminous z ≳ 10 Galaxy Candidates Test Early Stellar Mass Assembly
Finkelstein, Steven L.; Casey, Caitlin M.; Kartaltepe, Jeyhan S. +39 more
We report the discovery of 15 exceptionally luminous 10 ≲ z ≲ 14 candidate galaxies discovered in the first 0.28 deg2 of JWST/NIRCam imaging from the COSMOS-Web survey. These sources span rest-frame UV magnitudes of ‑20.5 > M UV > ‑22, and thus constitute the most intrinsically luminous z ≳ 10 candidates identified by J…