Search
Now showing items 41-50 of 444
Chemical Evolution with Radial Mixing Redux: a detailed model for formation and evolution of the Milky Way
(2023-08-31)
We present a multi-zone galactic chemical evolution (GCE) model for the Milky Way that takes the most recently updated yields of major nucleosynthesis channels into account. It incorporates physical processes commonly found ...
SKA Science Data Challenge 2: analysis and results
(2023-08-31)
The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomers will be correspondingly large and complex, ...
Cosmic evolution of radio-AGN feedback: confronting models with data
(2023-08-30)
Radio-mode feedback is a key ingredient in galaxy formation and evolution models, required to reproduce the observed properties of massive galaxies in the local Universe. We study the cosmic evolution of radio-active ...
Population statistics of intermediate-mass black holes in dwarf galaxies using the NEWHORIZON simulation
(2023-08-30)
While it is well established that supermassive black holes (SMBHs) co-evolve with their host galaxy, it is currently less clear how lower mass black holes, so-called intermediate mass black holes (IMBHs), evolve within ...
A variable active galactic nucleus at $z=2.06$ triply-imaged by the galaxy cluster MACS J0035.4-2015
(2023-07-31)
We report the discovery of a triply imaged active galactic nucleus (AGN), lensed by the galaxy cluster MACS J0035.4−2015 (z d = 0.352). The object is detected in Hubble Space Telescope imaging taken for the RELICS program. ...
Carbonaceous dust grains seen in the first billion years of cosmic time
(2023-07-19)
Large dust reservoirs (up to approximately 10 8 M ⊙) have been detected 1–3 in galaxies out to redshift z ≃ 8, when the age of the Universe was only about 600 Myr. Generating substantial amounts of dust within such a short ...
The ionising photon production efficiency at z~6 for Lyman-alpha emitters using JEMS and MUSE
(2023-06-15)
We study the ionising photon production efficiency at the end of the Epoch of Reionisation ($z \sim 5.4 - 6.6$) for a sample of 30 Lyman-$\alpha$ emitters. This is a crucial quantity to infer the ionising photon budget of ...
VICTORIA project: The LOFAR HBA Virgo Cluster Survey
(2023-06-02)
Context. The Virgo cluster is the nearest (d = 16.5 Mpc) massive (M ≥ 1014 M⊙) galaxy cluster and is therefore a prime target for studying astrophysical processes in dense large-scale environments. In the radio band, we ...
Identifying and characterizing ultracool dwarfs ejected from post-encounter disintegrating systems
(2023-06-01)
Disintegrating multiple systems have been previously discovered from kinematic studies of the $\it Hipparcos$ catalogue. They are presumably the result of dynamical encounters taking place in the Galactic disk between ...
VISIONS: The VISTA Star Formation Atlas
(2023-05-31)
VISIONS is an ESO public survey of five nearby (d < 500 pc) star-forming molecular cloud complexes that are canonically associated with the constellations of Chamaeleon, Corona Australis, Lupus, Ophiuchus, and Orion. The ...