Search Publications
A JWST Survey of the Supernova Remnant Cassiopeia A
Temim, Tea; Burrows, Adam; Rest, Armin +44 more
We present initial results from a James Webb Space Telescope (JWST) survey of the youngest Galactic core-collapse supernova remnant, Cassiopeia A (Cas A), made up of NIRCam and MIRI imaging mosaics that map emission from the main shell, interior, and surrounding circumstellar/interstellar material (CSM/ISM). We also present four exploratory positi…
Discovery of a new N-emitter in the epoch of reionization
Schaerer, D.; Marques-Chaves, R.; Xiao, M. +1 more
We report the discovery of a compact star-forming galaxy at z = 9.380 in the GOODS-North field (named GN-z9p4), which shows numerous strong UV-optical emission lines and a single UV line, N IV] λ1486. This makes GN-z9p4 the third-highest redshift N-emitter known to date. We determined the nebular abundances of H, C, N, O and Ne, along with the siz…
SkyMapper Southern Survey: Data release 4
Wolf, Christian; Tonry, John L.; Onken, Christopher A. +5 more
We present the fourth data release (DR4) of the SkyMapper Southern Survey (SMSS), the last major step in our hemispheric survey with six optical filters: u, v, g, r, i, z. SMSS DR4 covers 26 000 deg
JADES: Resolving the Stellar Component and Filamentary Overdense Environment of Hubble Space Telescope (HST)-dark Submillimeter Galaxy HDF850.1 at z = 5.18
Chevallard, Jacopo; Übler, Hannah; Bunker, Andrew J. +28 more
HDF850.1 is the brightest submillimeter galaxy (SMG) in the Hubble Deep Field. It is known as a heavily dust-obscured star-forming galaxy embedded in an overdense environment at z = 5.18. With nine-band NIRCam images at 0.8-5.0 µm obtained through the JWST Advanced Deep Extragalactic Survey, we detect and resolve the rest-frame UV-optical co…
JWST detection of a supernova associated with GRB 221009A without an r-process signature
Rest, Armin; Villar, V. Ashley; Yadavalli, S. Karthik +18 more
Identifying the sites of r-process nucleosynthesis, a primary mechanism of heavy element production, is a key goal of astrophysics. The discovery of the brightest gamma-ray burst (GRB) to date, GRB 221009A, presented an opportunity to spectroscopically test the idea that r-process elements are produced following the collapse of rapidly rotating ma…
REBELS-25: discovery of a dynamically cold disc galaxy at z = 7.31
Inami, Hanae; Ferrara, Andrea; Pallottini, Andrea +21 more
We present high-resolution (
1100 days in the life of the supernova 2018ibb. The best pair-instability supernova candidate, to date
Filippenko, Alexei V.; Fransson, Claes; Gromadzki, Mariusz +63 more
Stars with zero-age main sequence masses between 140 and 260 M⊙ are thought to explode as pair-instability supernovae (PISNe). During their thermonuclear runaway, PISNe can produce up to several tens of solar masses of radioactive nickel, resulting in luminous transients similar to some superluminous supernovae (SLSNe). Yet, no unambigu…
Gas-phase metallicity gradients in galaxies at z ∼ 6–8
Maiolino, R.; Castellano, M.; Pentericci, L. +18 more
The study of gas-phase metallicity and its spatial distribution at high redshift is crucial to understand the processes that shaped the growth and evolution of galaxies in the early Universe. Here we study the spatially resolved metallicity in three systems at z ∼ 6 ‑ 8, namely A2744-YD4, BDF-3299, and COSMOS24108, with JWST NIRSpec IFU low-resolu…
JADES: The emergence and evolution of Lyα emission and constraints on the intergalactic medium neutral fraction
Chevallard, Jacopo; Maseda, Michael V.; Parlanti, Eleonora +32 more
The rest-frame UV recombination emission line Lyα can be powered by ionising photons from young massive stars in star-forming galaxies, but the fact that it can be resonantly scattered by neutral gas complicates its interpretation. For reionisation-era galaxies, a neutral intergalactic medium will scatter Lyα from the line of sight, making Lyα a u…
The SARAO MeerKAT 1.3 GHz Galactic Plane Survey
Umana, G.; Heywood, I.; Camilo, F. +127 more
We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz continuum survey of almost half of the Galactic Plane (251° ≤l ≤ 358° and 2° ≤l ≤ 61° at |b| ≤ $1{_{.}^{\circ}}5$). SMGPS is the largest, most sensitive, and highest angular resolution 1 GHz survey of the plane yet carried out, with an angular resolution of 8 arcsec and a broad-…