Using low frequency radio observations of the galaxy NGC 2276 with the uGMRT and LOFAR telescopes, the authors discover that the galaxy has a trail of gas about 100 kiloparsecs long! As the galaxy moves through the local ionised medium, the pressure exerted on it removes gas from it’s disk.
The distribution of post-starburst regions within galaxies is linked to diverse quenching pathways that are likely driven by mergers. Guest author, Emmy Wisz, explains how different star formation histories could be the key to understanding quenching mechanisms.
The authors of today’s featured paper investigated how a decades-long stakeout of a sample of blazars uncovered new insights into a serious case of cosmic “jet-lag”.
The Shapley Supercluster is widely recognised as the most massive gravitationally bound structure in the local universe.The supercluster is made up of 11 galaxy clusters and groups and extends across ~ 260 megaparsecs. At its core, which this paper focuses on, are five clusters. This core hosts several radio haloes,which are caused by shock-heated gas from the Intracluster medium (ICM) and is evidence of ongoing cluster merger activity. This supercluster core is highly dynamically active (full of cluster-cluster mergers), which could influence the evolution of galaxies within the core. This paper examines the evolution of galaxies by observing the cold gas within galaxies (i.e. the neutral hydrogen) and compares several galaxy properties to do so (see also: this previous Astrobite featuring ram-pressure stripped galaxies in the Shapley Supercluster).
Today’s bite reports the discovery of the most distant red galaxy ever confirmed!
What if JWST’s early massive galaxies are not overestimated, but underestimated? A bottom-heavy IMF could hide tons of mass in faint stars.