Telescopes

The supernova remnants 1E 0102.2-7219

An article published in the journal “Nature Astronomy” describes the study of the supernova remnants identified as 1E 0102.2-7219 in the Small Magellanic Cloud. A team of researchers led by Frédéric Vogt used the MUSE instrument installed on ESO’s VLT to observe a large ring of gas in that system that is slowly expanding into the depths of several other gas filaments that are quickly moving away, leaving behind a neutron star in the center.

Icarus (MACS J1149+2223 Lensed Star 1)

An article published in the journal “Nature Astronomy” describes the observation of the most distant star and therefore also the oldest observed so far, nicknamed Icarus, about 9 billion light years from Earth. A team of researchers exploited a double gravitational lensing effect that magnified the image of the star, which was called MACS J1149+2223 Lensed Star 1 but for that reason it’s simply called Lensed Star 1 (LS1). That effect made it become bright enough to be detectable by the Hubble Space Telescope.

Artist's concept of the interstellar asteroid 'Oumuamua (Image European Southern Observatory/M. Kornmesser)

An article published in the journal “Monthly Notices of the Royal Astronomical Society” describes a research on the interstellar asteroid 1I/2017 U1, commonly known as ‘Oumuamua. A team of researchers tried to understand the implications of its passage in the solar system for planetary dynamics and the formation of planetesimals, the small celestial bodies that can accumulate materials to become planets. ‘Oumuamua could be a fragment of one ejected from its system and some clues suggest that its nature is cometary rather than asteroidal.

The galaxy NGC 1052-DF2 (Image NASA, ESA, and P. van Dokkum (Yale University))

An article published in the journal “Nature” describes a research on the ultra-diffuse galaxy NGC 1052-DF2. A team of researchers led by Pieter van Dokkum of Yale University, used a number of telescopes to observe this galaxy’s composition concluding that it contains a very low amount of dark matter. The gravitational effects detected in the galaxies show that generally they contain an amount of dark matter much higher than that of ordinary matter but NGC 1052-DF2 is an exception and therefore must be carefully studied.

Scenario of a FELT event (Image NASA, ESA, and A. Feild (STScI) )

An article published in the journal “Nature Astronomy” describes a research that offers an explanation to a type of extremely bright event called Fast-Evolving Luminous Transient (FELT), that lasts just a few days. A team of researchers took advantage of the ability of NASA’s Kepler space telescope to accurately detect rapid changes in starlight to build a model in which a FELT event is caused by a large shell of gas and dust around a supernova, which makes it shine.