Search Publications
Overview and public data release of the augmented Auriga Project: cosmological simulations of dwarf and Milky Way-mass galaxies
Springel, Volker; Grand, Robert J. J.; Gómez, Facundo A. +4 more
We present an extended suite of the Auriga cosmological gravo-magnetohydrodynamical 'zoom-in' simulations of 40 Milky Way-mass haloes and 26 dwarf galaxy-mass haloes run with the moving-mesh code AREPO. Auriga adopts the Lambda cold dark matter cosmogony and includes a comprehensive galaxy formation physics model following the coupled cosmic evolu…
JWST reveals widespread AGN-driven neutral gas outflows in massive z 2 galaxies
Conroy, Charlie; Johnson, Benjamin D.; Belli, Sirio +15 more
We use deep JWST/NIRSpec R ~ 1000 slit spectra of 113 galaxies at $1.7 < z < 3.5$, selected from the mass-complete Blue Jay survey, to investigate the prevalence and typical properties of neutral gas outflows at cosmic noon. We detect excess Na ID absorption (beyond the stellar contribution) in 46 per cent of massive galaxies (log M*
ΛCDM not dead yet: massive high-z Balmer break galaxies are less common than previously reported
Willott, Chris J.; Martis, Nicholas S.; Rihtaršič, Gregor +15 more
Early JWST observations that targeted so-called double-break sources (attributed to Lyman and Balmer breaks at z > 7), reported a previously unknown population of very massive, evolved high-redshift galaxies. This surprising discovery led to a flurry of attempts to explain these objects' unexpected existence including invoking alternatives to t…
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…
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 (
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-…
JADES - the Rosetta stone of JWST-discovered AGN: deciphering the intriguing nature of early AGN
Pérez-González, Pablo G.; Charlot, Stéphane; Parlanti, Eleonora +23 more
JWST has discovered a large population of active galactic nuclei (AGN) at high redshift, which are weak in the X-rays. Here we present the NIRSpec spectrum of the most extreme of these objects, GN-28074, an AGN at
The progenitor star of SN 2023ixf: a massive red supergiant with enhanced, episodic pre-supernova mass loss
Sollerman, Jesper; Perley, Daniel A.; Fremling, Christoffer +10 more
We identify the progenitor star of SN 2023ixf in Messier 101 using Keck/NIRC2 adaptive optics imaging and pre-explosion Hubble Space Telescope (HST)/Advanced Camera for Surveys (ACS) images. The supernova, localized with diffraction spikes and high-precision astrometry, unambiguously coincides with a progenitor candidate of
The epoch of the Milky Way's bar formation: dynamical modelling of Mira variables in the nuclear stellar disc
Smith, Leigh C.; Matsunaga, Noriyuki; Minniti, Dante +4 more
A key event in the history of the Milky Way is the formation of the bar. This event affects the subsequent structural and dynamical evolution of the entire Galaxy. When the bar formed, gas was likely rapidly funnelled to the centre of the Galaxy settling in a star-forming nuclear disc. The Milky Way bar formation can then be dated by considering t…
JWST UNCOVER: the overabundance of ultraviolet-luminous galaxies at z > 9
Nanayakkara, Themiya; van Dokkum, Pieter; Fujimoto, Seiji +20 more
Over the past year, JWST has uncovered galaxies at record-breaking distances up to z ~ 13. The JWST UNCOVER (ultra-deep NIRSpec and NIRcam observations before the epoch of reionization) program has obtained ultra-deep multiwavelength NIRCam imaging of the massive galaxy cluster A2744 over ~45 arcmin2 down to ~29.5 AB mag. Here, we prese…