Search Publications
JADES. Possible Population III signatures at z = 10.6 in the halo of GN-z11
Charlot, Stéphane; Carniani, Stefano; Übler, Hannah +33 more
Finding the first generation of stars formed out of pristine gas in the early Universe, known as Population III (PopIII) stars, is one of the most important goals of modern astrophysics. Recent models have suggested that PopIII stars may form in pockets of pristine gas in the halo of more evolved galaxies. We present NIRSpec integral field spectro…
Extreme N-emitters at high redshift: Possible signatures of supermassive stars and globular cluster or black hole formation in action
Schaerer, D.; Marques-Chaves, R.; Brammer, G. +9 more
Context. Recent James Webb Space Telescope (JWST) spectroscopic observations of the z = 10.6 galaxy GN-z11 have revealed a very peculiar UV spectrum exhibiting intense emission lines of nitrogen, which are not typically detected in galaxy spectra. This observation indicates a super-solar N/O abundance ratio at low metallicity, which only resembles…
Deciphering the JWST spectrum of a 'little red dot' at z ∼ 4.53: An obscured AGN and its star-forming host
Heintz, Kasper E.; Brammer, Gabriel; Coe, Dan +10 more
JWST has revealed a class of numerous, extremely compact sources with rest-frame red optical/near-infrared (NIR) and blue ultraviolet (UV) colours nicknamed 'little red dots'. We present one of the highest signal-to-noise ratio JWST NIRSpec prism spectra of a little red dot, J0647_1045 at z = 4.5319 ± 0.0001, and examine its NIRCam morphology to d…
JADES: The incidence rate and properties of galactic outflows in low-mass galaxies across 3 < z < 9
Chevallard, Jacopo; Maseda, Michael V.; Parlanti, Eleonora +30 more
We investigate the incidence and properties of ionised gas outflows in a sample of 52 galaxies with stellar masses between 107 M⊙ and 109 M⊙ observed with ultra-deep JWST/NIRSpec MSA spectroscopy as part of the JWST Advanced Deep Extragalactic Survey (JADES). The high-spectral resolution (R2700) NIRSpec …
Inside the bubble: exploring the environments of reionisation-era Lyman-α emitting galaxies with JADES and FRESCO
Chevallard, Jacopo; Carniani, Stefano; Übler, Hannah +35 more
We present a study of the environments of 17 Lyman-α emitting galaxies (LAEs) in the reionisation-era (5.8 < z < 8) identified by JWST/NIRSpec as part of the JWST Advanced Deep Extragalactic Survey (JADES). Unless situated in sufficiently (re)ionised regions, Lyman-α emission from these galaxies would be strongly absorbed by neutral gas in t…
Super-early JWST galaxies, outflows, and Lyα visibility in the Epoch of Reionization
Ferrara, A.
The overabundance of super-early (redshift z > 10) luminous (MUV < −20) blue galaxies detected by JWST has been explained as being due to negligible dust attenuation in these systems. We show that this model correctly reproduces the UV luminosity function at z > 10 and the star formation rate (SFR) density evolution. The model …
PDRs4All. IV. An embarrassment of riches: Aromatic infrared bands in the Orion Bar
Hartigan, Patrick; Zhang, Yong; Gordon, Karl D. +136 more
Context. Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs are found at 3.3, 6.2, 7.7, 8.6, and 11.2 µm. The most sensitive, highest-resolution infrared spectral imaging data ever taken of the prototypical PDR, the Orion Bar, have b…
Improving the open cluster census. III. Using cluster masses, radii, and dynamics to create a cleaned open cluster catalogue
Reffert, Sabine; Hunt, Emily L.
Context. The census of open clusters has exploded in size thanks to data from the Gaia satellite. However, it is likely that many of these reported clusters are not gravitationally bound, making the open cluster census impractical for many scientific applications.
Aims: We aim to test different physically motivated methods for distinguishing …
Galaxy morphology from z ∼ 6 through the lens of JWST
Wuyts, S.; Elbaz, D.; Dickinson, M. +27 more
Context. The James Webb Space Telescope's (JWST's) unprecedented combination of sensitivity, spatial resolution, and infrared coverage has enabled a new era of galaxy morphology exploration across most of cosmic history.
Aims: We analyze the near-infrared (NIR ∼ 0.8 − 1 µm) rest-frame morphologies of galaxies with log M*/M
JWST Observations of Young protoStars (JOYS+): Detecting icy complex organic molecules and ions. I. CH4, SO2, HCOO−, OCN−, H2CO, HCOOH, CH3CH2OH, CH3CHO, CH3OCHO, and CH3COOH
Ray, T. P.; Chen, Y.; Henning, Th. +23 more
Context. Complex organic molecules (COMs) are ubiquitously detected in the gas phase and thought to be mostly formed on icy grains. Nevertheless, there have not been any unambiguous detections of COMs larger than CH3OH in ices reported thus far. Exploring this matter in greater detail has now become possible with the unprecedented possi…