Search Publications
Rapid Quenching of Galaxies at Cosmic Noon
Conroy, Charlie; Johnson, Benjamin D.; Belli, Sirio +6 more
The existence of massive quiescent galaxies at high redshift seems to require rapid quenching, but it is unclear whether all quiescent galaxies have gone through this phase and what physical mechanisms are involved. To study rapid quenching, we use rest-frame colors to select 12 young quiescent galaxies at z ~ 1.5. From spectral energy distributio…
The ALMA Survey of 70 µm Dark High-mass Clumps in Early Stages (ASHES). IX. Physical Properties and Spatial Distribution of Cores in IRDCs
Jackson, James M.; Sanhueza, Patricio; Lu, Xing +13 more
The initial conditions found in infrared dark clouds (IRDCs) provide insights on how high-mass stars and stellar clusters form. We have conducted high-angular resolution and high-sensitivity observations toward thirty-nine massive IRDC clumps, which have been mosaicked using the 12 and 7 m arrays from the Atacama Large Millimeter/submillimeter Arr…
Color Gradients and Half-mass Radii of Galaxies Out to z = 2 in the CANDELS/3D-HST Fields: Further Evidence for Important Differences in the Evolution of Mass-weighted and Light-weighted Sizes
Mowla, Lamiya; van Dokkum, Pieter; Miller, Tim B.
Recent studies have indicated that the ratio between half-mass and half-light radii, r mass/r light, varies significantly as a function of stellar mass and redshift, complicating the interpretation of the ubiquitous r light - M * relation. To investigate, in this study we construct the light and color pr…
The First JWST Spectral Energy Distribution of a Y Dwarf
Cushing, Michael C.; Kirkpatrick, J. Davy; Marley, Mark S. +3 more
We present the first JWST spectral energy distribution of a Y dwarf. This spectral energy distribution of the Y0 dwarf WISE J035934.06-540154.6 consists of low-resolution (λ/Δλ ~100) spectroscopy from 1-12 µm and three photometric points at 15, 18, and 21 µm. The spectrum exhibits numerous fundamental, overtone, and combination rotatio…
Nitrogen-enriched, Highly Pressurized Nebular Clouds Surrounding a Super Star Cluster at Cosmic Noon
Pascale, Massimo; Dai, Liang; McKee, Christopher F. +1 more
Strong lensing offers a precious opportunity for studying the formation and early evolution of super star clusters that are rare in our cosmic backyard. The Sunburst Arc, a lensed Cosmic Noon galaxy, hosts a young super star cluster with escaping Lyman continuum radiation. Analyzing archival Hubble Space Telescope images and emission line data fro…
The Mass-Metallicity Relation of Dwarf Galaxies at Cosmic Noon from JWST Observations
Chevallard, Jacopo; Fan, Xiaohui; Cai, Zheng +13 more
We present a study of the mass-metallicity relation (MZR) of 51 dwarf galaxies (M ⋆ ≈ 106.5-109.5 M ⊙) at z = 2-3 from the A2744 and SMACS J0723-3732 galaxy cluster fields. These dwarf galaxies are identified and confirmed by deep JWST/NIRISS imaging and slitless grism spectroscopic observations. By taki…
Paschen-line Constraints on Dust Attenuation and Star Formation at z 1-3 with JWST/NIRSpec
Shapley, Alice E.; Reddy, Naveen A.; Sanders, Ryan L. +2 more
We use medium-resolution JWST/NIRSpec observations from the Cosmic Evolution Early Release Science Survey to place the first constraints on dust attenuation and star formation based on Paschen lines for a sizable sample of 63 galaxies at redshifts z = 1.0-3.1. Our analysis indicates strong correlations between the Balmer decrement, Hα/Hβ, and line…
JWST/MIRI Spectroscopy of the Disk of the Young Eruptive Star EX Lup in Quiescence
Banzatti, Andrea; Henning, Thomas; Bouwman, Jeroen +7 more
EX Lup is a low-mass pre-main-sequence star that occasionally shows accretion-related outbursts. Here, we present JWST/MIRI medium-resolution spectroscopy obtained for EX Lup 14 yr after its powerful outburst. EX Lup is now in quiescence and displays a Class II spectrum. We detect a forest of emission lines from molecules previously identified in …
PHANGS-JWST First Results: Variations in PAH Fraction as a Function of ISM Phase and Metallicity
Kruijssen, J. M. Diederik; Leroy, Adam K.; Rosolowsky, Erik +26 more
We present maps tracing the fraction of dust in the form of polycyclic aromatic hydrocarbons (PAHs) in IC 5332, NGC 628, NGC 1365, and NGC 7496 from JWST/MIRI observations. We trace the PAH fraction by combining the F770W (7.7 µm) and F1130W (11.3 µm) filters to track ionized and neutral PAH emission, respectively, and comparing the PA…
Early Planet Formation in Embedded Disks (eDisk). II. Limited Dust Settling and Prominent Snow Surfaces in the Edge-on Class I Disk IRAS 04302+2247
Kwon, Woojin; Lai, Shih-Ping; Han, Ilseung +26 more
While dust disks around optically visible, Class II protostars are found to be vertically thin, when and how dust settles to the midplane are unclear. As part of the Atacama Large Millimeter/submillimeter Array large program, Early Planet Formation in Embedded Disks, we analyze the edge-on, embedded, Class I protostar IRAS 04302+2247, also nicknam…