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Galaxies and clusters are the ensembles of stars and other astronomical objects bound together by gravitational forces. Galaxies are ordered into galaxy groups, which are in turn organised into clusters. The Earth is in a galaxy called the Milky Way, which is in the Local Group in the Virgo Supercluster.
Gravitational wave background offers insights into supermassive black hole binaries. Here, authors refine noise models in pulsar timing data to better understand the nanohertz gravitational wave background and find support to a population of slowly inspiraling binaries in circular orbits as its source.
Perturbations to strongly lensed galaxy light in very long baseline interferometric imaging reveal a dark and unusually low-mass object at redshift z ≈ 0.9.
JWST has found an unexpectedly high density of AGNs at early times, raising the possibility that AGNs may have provided sufficient numbers of ionizing photons for cosmic reionization. New results definitively rule out AGNs as the dominant source of reionization.
Observed 730 Myr after the Big Bang, a little red dot is found to anchor an overdensity of eight galaxies and seems to be embedded in a massive host dark matter halo.
The results from a state-of-the-art suite of hydrodynamical cosmological zoom-in simulations show how globular clusters naturally emerge in the Standard Cosmology and also reveal the existence of a new class of object called globular-cluster-like dwarfs.
The application of state-of-the-art machine learning algorithms to Euclid’s first quick data release has enabled the discovery of around 500 new strong gravitational lenses, validating predictions that next-generation surveys will substantially extend the reach of strong lensing science.
Eugene Vasiliev started developing Agama to support both personal research and the growing needs of the stellar and galactic dynamics community. Looking ahead, Agama is set to become an all-rounder for dynamical modelling.
Two new studies provide potential evidence for the formation of the unexpectedly bright and massive galaxy populations that have been detected with JWST in the early Universe.
An analysis of two post-starburst galaxies at high redshift indicates the presence of ongoing feedback between the stellar material and the supermassive black hole.
A conference at the International Academic Forum of Heidelberg University, Germany, brought together 80 experts across various disciplines to recount recent breakthroughs in extragalactic astrophysics and ask, where are you going, galaxy evolution?
