On December 11, 2021, the Neil Gehrels Swift Observatory satellite observed a gamma-ray burst, named GRB 211211A that is one of the brightest ever observed. Then, ground-based and space-based telescopes started to follow up GRB 211211A to obtain images at Read More …
On Dec. 11, 2021, NASA’s Neil Gehrels Swift Observatory detected a blast of high-energy light from a galaxy roughly 1 billion light-years away. The event, which was simultaneously detected by Fermi Gamma-ray Space Telescope, brings into question what was thought Read More …
Dark matter and energy are not sufficient to explain the formation and evolution of modern galaxies. Violent phenomena, associated with the end of stars (supernovae), mergers of black holes and neutron stars, supermassive black holes accreting mass from the galactic Read More …
The Event Horizon Telescope network has captured the second-ever direct image of a black hole — called Sagittarius A* — at the centre of the Milky Way. Radio astronomers have imaged the super massive black hole at the centre of Read More …
The research developed within AHAED2020 has lead to innovative tools supporting multi-messenger astrophysics! Most of what is known about the Universe comes from observations of electromagnetic radiation. However, there are other “cosmic messengers.” Gravitational waves are invisible (yet incredibly fast) Read More …
Four enormous cavities, or bubbles, have been found at the center of a galaxy cluster using NASA’s Chandra X-ray Observatory. The left panel of the following graphic shows an optical image of the galaxy cluster called RBS 797, from NASA’s Read More …
A joint effort with the Italian Space Agency, the IXPE observatory is NASA’s first mission dedicated to measuring the polarization of X-rays from the most extreme and mysterious objects in the universe – supernova remnants, supermassive black holes, and dozens Read More …
With a multiwavelength campaign, a group of astronomers led by the Italian National Institute of Astrophysics (INAF) studied a repeating fast radio burst (FRB). The object FRB20201124A, discovered in November 2020, reactivated in March 2021, emitting a series of radio Read More …
Massive galaxies and a fraction of lower mass galaxies in the Local Universe host a super massive black hole in their centre. Their mass ranges between millions and tens billions solar masses. When matter from the galaxies falls into the Read More …
Matter in the Universe is not evenly distributed but forms a cosmic web of filaments shaped by gravity, with galaxy clusters found at their intersections. Galaxy clusters are the largest bound entities in the Universe – they trace the highest Read More …
