An article published in the journal “Science” describes the discovery of the supernova ASASSN-15lh, the brightest discovered so far. A team of astronomers led by Subo Dong, of the Kavli Institute for Astronomy and Astrophysics at Peking University, China, studied this explosion that is extraordinary even by the standards of these events: it’s more than twice as bright as the one that held the record, about 200 times brighter than the average supernova, 570 billion times brighter than the Sun, and 20 times brighter than all the stars in the Milky Way put together.
An article published in the journal “Astronomy & Astrophysics” describes the discovery of the the most energetic pulses ever detected in a pulsar. An international team of scientists used the two MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes at the Roque de los Muchachos Observatory on La Palma, Canary Islands, to observe the Crab pulsar.
At the 227th meeting of the American Astronomical Society in Kissimmee, Florida there was a presentation of significant improvements that NASA obtained to the performance of its Fermi Gamma-ray Space Telescope. The data collected by its Large Area Telescope (LAT) instrument were analyzed again in what was called Pass 8 with a new software. That allowed to discover new gamma ray sources that previously weren’t identified. At the same time it was possible to improve the ability of the LAT to determine the direction of the incoming gamma rays.
An article published in “The Astrophysical Journal Letters” describes a research that led to the discovery of stars really out of the ordinary. Those are binary systems consisting of two very massive stars where immense eruptions can take place. These systems are twins of Eta Carinae, which became famous for the eruption sighted in the 19th century. Examining observations made using the Hubble and Spitzer space telescopes a group of researchers found 5 candidates in other galaxies.
Analyzing the observations made using NASA’s Spitzer WISE space telescopes, many runaway stars were discovered. Those stars are called that way for the remarkable speed they’re moving at in space. One way to identify a potential runaway star is to seek what in jargon is called “bow shock” and indicates the area between a magnetosphere and a surrounding environment. It’s an arc-shaped structure that extends in front of the star and can be very extensive.