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A Fast Radio Burst in a Compact Galaxy Group at z ∼ 1
Kilpatrick, Charles D.; Simha, Sunil; Prochaska, J. Xavier +14 more
FRB 20220610A is a high-redshift fast radio burst (FRB) that has not been observed to repeat. Here, we present rest-frame UV and optical Hubble Space Telescope observations of the field of FRB 20220610A. The imaging reveals seven extended sources, one of which we identify as the most likely host galaxy with a spectroscopic redshift of z = 1.017. W…
MIRI MRS Observations of β Pictoris. I. The Inner Dust, the Planet, and the Gas
Law, David R.; Stark, Christopher C.; Chen, Christine H. +15 more
We present JWST MIRI Medium Resolution Spectrograph (MRS) observations of the β Pictoris system. We detect an infrared excess from the central unresolved point source from 5 to 7.5 µm which is indicative of dust within the inner ∼7 au of the system. We perform point-spread function (PSF) subtraction on the MRS data cubes and detect a spatial…
Glimmers in the Cosmic Dawn: A Census of the Youngest Supermassive Black Holes by Photometric Variability
Melinder, Jens; Ellis, Richard S.; Saxena, Aayush +10 more
We report the first results from a deep near-infrared campaign with the Hubble Space Telescope to obtain late-epoch images of the Hubble Ultra Deep Field, 10–15 yr after the first epoch data were obtained. The main objectives are to search for faint active galactic nuclei (AGN) at high redshifts by virtue of their photometric variability and measu…
ALMA-IMF. IX. Catalog and Physical Properties of 315 SiO Outflow Candidates in 15 Massive Protoclusters
Galván-Madrid, R.; Cunningham, N.; Csengeri, T. +24 more
We present a catalog of 315 protostellar outflow candidates detected in SiO J = 5 - 4 in the ALMA-IMF Large Program, observed with ~2000 au spatial resolution, 0.339 km s-1 velocity resolution, and 2-12 mJy beam-1 (0.18-0.8 K) sensitivity. We find median outflow masses, momenta, and kinetic energies of ~0.3 M ⊙, 4 …
The Cosmic Ultraviolet Baryon Survey (CUBS). VII. On the Warm-hot Circumgalactic Medium Probed by O VI and Ne VIII at 0.4 ≲ z ≲ 0.7
Faucher-Giguère, Claude-André; Johnson, Sean D.; Petitjean, Patrick +12 more
This paper presents a newly established sample of 103 unique galaxies or galaxy groups at 0.4 ≲ z ≲ 0.7 from the Cosmic Ultraviolet Baryon Survey (CUBS) for studying the warm-hot circumgalactic medium (CGM) probed by both O VI and Ne VIII absorption. The galaxies and associated neighbors are identified at <1 physical Mpc from the sightlines tow…
Remarkably Compact Quiescent Candidates at 3 < z < 5 in JWST-CEERS
Bezanson, Rachel; Nelson, Erica; Suess, Katherine A. +9 more
In this Letter, we measure the rest-frame optical and near-infrared sizes of 10 quiescent candidates at 3 < z < 5, first reported by Carnall et al. We use James Webb Space Telescope Near-Infrared Camera F277W and F444W imaging obtained through the public CEERS Early Release Science program and imcascade, an astronomical fitting code that uti…
Dust in Little Red Dots
Casey, Caitlin M.; Long, Arianna S.; McKinney, Jed +5 more
JWST has revealed a ubiquitous population of "little red dots" (LRDs) at z ≳ 4, selected via their red rest-frame optical emission and compact morphologies. They are thought to be reddened by dust, whether in tori of active galactic nuclei (AGNs) or the interstellar medium, though none have direct dust detections to date. Informed by the average c…
Deep Hubble Space Telescope Photometry of Large Magellanic Cloud and Milky Way Ultrafaint Dwarfs: A Careful Look into the Magnitude–Size Relation
Choi, Yumi; van der Marel, Roeland P.; Torrey, Paul +16 more
We present deep Hubble Space Telescope photometry of 10 targets from Treasury Program GO-14734, including six confirmed ultrafaint dwarf (UFD) galaxies, three UFD candidates, and one likely globular cluster. Six of these targets are satellites of, or have interacted with, the Large Magellanic Cloud (LMC). We determine their structural parameters u…
The Size–Mass Relation at Rest-frame 1.5 µm from JWST/NIRCam in the COSMOS-WEB and PRIMER-COSMOS Fields
Bell, Eric F.; Franx, Marijn; van der Wel, Arjen +4 more
We present the galaxy stellar mass–size relation in the rest-frame near-IR (1.5 µm) and its evolution with redshift up to z = 2.5. Sérsic profiles are measured for ∼26,000 galaxies with stellar masses M ⋆ > 109 M ⊙ from JWST/NIRCam F277W and F444W imaging provided by the COSMOS-WEB and PRIMER surveys using…
The JWST-SUSPENSE Ultradeep Spectroscopic Program: Survey Overview and Star Formation Histories of Quiescent Galaxies at 1 < z < 3
Barro, Guillermo; Franx, Marijn; Muzzin, Adam +19 more
We present an overview and first results from the Spectroscopic Ultradeep Survey Probing Extragalactic Near-infrared Stellar Emission (SUSPENSE), executed with NIRSpec on JWST. The primary goal of the SUSPENSE program is to characterize the stellar, chemical, and kinematic properties of massive quiescent galaxies at cosmic noon. In a single deep N…