Galaxies

The Hyperion proto-supercluster (Image ESO/L. Calçada & Olga Cucciati et al.)

An article published in the journal “Astronomy & Astrophysics” describes the discovery of a huge galaxy proto-supercluster with a mass close to that of the largest existing structures in the recent universe. A team led by Olga Cucciati of the Italian Institute for Astrophysics, Bologna discovered it thanks to the data collected by the VUDS (VIMOSUltra-Deep Survey) project and named it Hyperion after the titan because it’s really titanic. the researchers estimated that this structure dates back about 2.3 billion years after the Big Bang, the largest and most massive discovered dating back to such a remote era with a mass estimated at over a million billion times the Sun’s.

A tail for a group of galaxies attracted by the Abell 2142 cluster

An article published in the journal “Astronomy & Astrophysics” describes the observation of a small group of galaxies attracted by the galaxy cluster Abell 2142 and approaching it a trail of very hot gas was created. A team of researchers led by Dominique Eckert, now at the German Max Planck Institute for Extraterrestrial Physics, used NASA’s Chandra X-ray space observatory to detect the emissions from a sort of tail that extends over a million light years.

The images captured by TESS (NASA/MIT/TESS)

NASA has published a series of images captured by its TESS space telescope’s cameras. These are the first scientific images, that in jargon are called the first light, obtained on August 7, 2018 after the instrument testing period and show the southern sky. The images portray an amount of stars and other objects among which systems where exoplanets were already found. However, the main goal is to discover new exoplanets.

The galaxy cluster Abell 370 (Image NASA, ESA, A. Koekemoer, M. Jauzac, C. Steinhardt, and the BUFFALO team)

The first Hubble Space Telescope’s observations in the new BUFFALO project have been published. Its goal is to shed light on the evolution of the first galaxies of the universe, also to establish the most interesting observation targets for the James Webb space telescope. The Abell 370 galaxy cluster is the first to be studied for this new survey together with a series of galaxies seen through gravitational lenses.

A ring galaxy with a lot of ultraluminous X-ray sources

An article published in the “Astrophysical Journal” describes the detection of a series of X-ray sources in the ring of the galaxy AM 0644-741. A team of researchers led by Anna Wolter from INAF-Osservatorio Astronomico di Brera, Italy, used observations from NASA’s Chandra X-ray Observatory to discover those ultraluminous sources concluding that the ring containing them consists of binary systems that include black holes or neutron stars and that the ring formed following a collision between galaxies.