Search Publications
First Results from the JWST Early Release Science Program Q3D: Ionization Cone, Clumpy Star Formation, and Shocks in a z = 3 Extremely Red Quasar Host
Johnson, Sean D.; Lützgendorf, Nora; Hamann, Fred +25 more
Massive galaxies formed most actively at redshifts z = 1-3 during the period known as "cosmic noon." Here we present an emission-line study of the extremely red quasar SDSSJ165202.64+172852.3's host galaxy at z = 2.94, based on observations with the Near Infrared Spectrograph integral field unit on board JWST. We use standard emission-line diagnos…
CEERS MIRI Imaging: Data Reduction and Quality Assessment
Yung, L. Y. Aaron; Kartaltepe, J. S.; Dickinson, M. +35 more
The Cosmic Evolution Early Release Science Survey (CEERS), targeting the Extended Groth Strip extragalactic field, is one of the James Webb Space Telescope Director's Discretionary Early Release Science programs. To date, all observations have been executed and include NIRCam/MIRI imaging and NIRSpec/NIRCam spectroscopic exposures. Here we discuss…
A Reanalysis of the Isolated Black Hole Candidate OGLE-2011-BLG-0462/MOA-2011-BLG-191
Lu, Jessica R.; Lam, Casey Y.
There are expected to be ~108 isolated black holes (BHs) in the Milky Way. OGLE-2011-BLG-0462/MOA-2011-BLG-191 (OB110462) is the only such BH with a mass measurement to date. However, its mass is disputed: Lam et al. measured a lower mass of 1.6-4.4 M ⊙, while Sahu et al. and Mróz et al. measured a higher mass of 5.8-8.7 M
GOALS-JWST: Small Neutral Grains and Enhanced 3.3 µm PAH Emission in the Seyfert Galaxy NGC 7469
Inami, Hanae; Böker, Torsten; Law, David R. +37 more
We present James Webb Space Telescope (JWST) Near Infrared Spectrograph (NIRSpec) integral field spectroscopy of the nearby luminous infrared galaxy NGC 7469. We take advantage of the high spatial/spectral resolution and wavelength coverage of JWST/NIRSpec to study the 3.3 µm neutral polycyclic aromatic hydrocarbon (PAH) grain emission on ~2…
Chemodynamically Tagged Groups of CEMP Stars in the Halo of the Milky Way. I. Untangling the Origins of CEMP-s and CEMP-no Stars
Beers, Timothy C.; Placco, Vinicius M.; Mardini, Mohammad +7 more
We construct a sample of 644 carbon-enhanced metal-poor (CEMP) stars with abundance analyses based on moderate- to high-resolution spectroscopic studies. Dynamical parameters for these stars are estimated based on radial velocities, Bayesian parallax-based distance estimates, and proper motions from Gaia EDR3 and DR3, supplemented by additional av…
Early Results from GLASS-JWST. XIII. A Faint, Distant, and Cold Brown Dwarf
Santini, Paola; Castellano, Marco; Fontana, Adriano +18 more
We present the serendipitous discovery of a late T-type brown dwarf candidate in JWST NIRCam observations of the Early Release Science Abell 2744 parallel field. The discovery was enabled by the sensitivity of JWST at 4 µm wavelengths and the panchromatic 0.9-4.5 µm coverage of the spectral energy distribution. The unresolved point sou…
Stellar Escape from Globular Clusters. I. Escape Mechanisms and Properties at Ejection
Chatterjee, Sourav; Kremer, Kyle; Weatherford, Newlin C. +3 more
The theory of stellar escape from globular clusters (GCs) dates back nearly a century, especially the gradual evaporation of GCs via two-body relaxation coupled with external tides. More violent ejection can also occur via strong gravitational scattering, supernovae, gravitational wave-driven mergers, tidal disruption events, and physical collisio…
The Magnificent Five Images of Supernova Refsdal: Time Delay and Magnification Measurements
Treu, Tommaso; Broadhurst, Tom; Filippenko, Alexei V. +28 more
In late 2014, four images of supernova (SN) "Refsdal," the first known example of a strongly lensed SN with multiple resolved images, were detected in the MACS J1149 galaxy-cluster field. Following the images' discovery, the SN was predicted to reappear within hundreds of days at a new position ~8″ away in the field. The observed reappearance in l…
HETDEX Public Source Catalog 1: 220 K Sources Including Over 50 K Lyα Emitters from an Untargeted Wide-area Spectroscopic Survey
Ouchi, Masami; Finkelstein, Steven L.; Schneider, Donald P. +43 more
We present the first publicly released catalog of sources obtained from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral field spectroscopic survey designed to measure the Hubble expansion parameter and angular diameter distance at 1.88 < z < 3.52 by using the spatial distribution of more than a million Lyα-e…
An Hα Impression of Lyα Galaxies at z ≃ 6 with Deep JWST/NIRCam Imaging
Jiang, Linhua; Ning, Yuanhang; Cai, Zheng +3 more
We present a study of seven spectroscopically confirmed (Lyα-emitting) galaxies at redshift z ≃ 6 using the JWST/NIRCam imaging data. These galaxies, with a wide range of Lyα luminosities, were recently observed in a series of NIRCam broad and medium bands. We constrain the rest-frame UV/optical continua and measure the Hα line emission of the gal…