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Constraints on the Faint End of the Galaxy Stellar Mass Function at z ≃ 4–8 from Deep JWST Data
Rinaldi, Pierluigi; Caputi, Karina I.; Iani, Edoardo +3 more
We analyze a sample of 3300 galaxies between redshifts z ≃ 3.5 and z ≃ 8.5 selected from James Webb Space Telescope (JWST) images in the Hubble Ultra Deep Field and UKIDSS Ultra Deep Survey field, including objects with stellar masses as low as ≃108 M ⊙ up to z ≃ 8. The depth and wavelength coverage of the JWST data allows us…
Sulfur dioxide in the mid-infrared transmission spectrum of WASP-39b
Carter, Aarynn L.; Sing, David K.; Batalha, Natalie M. +70 more
The recent inference of sulfur dioxide (SO2) in the atmosphere of the hot (approximately 1,100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST observations1-3 suggests that photochemistry is a key process in high-temperature exoplanet atmospheres4. This is because of the low (<1 ppb) abundance of SO
FRB 20210405I: a nearby Fast Radio Burst localized to sub-arcsecond precision with MeerKAT
Gromadzki, M.; Kramer, M.; Woudt, P. A. +19 more
We present the first sub-arcsecond localized Fast Radio Burst (FRB) detected using MeerKAT. FRB 20210405I was detected in the incoherent beam using the MeerTRAP pipeline on 2021 April 05 with a signal to noise ratio of 140.8 and a dispersion measure of 565.17 pc cm-3. It was detected while MeerTRAP was observing commensally with the Thu…
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…