Blogs about telescopes and astronomical observations instruments

Artist's concept of a white dwarf stealing gas from a companion star (Image courtesy Russell Kightley)

An article published in the journal “Science” describes a research on the remnants of a strange supernova cataloged as LP 40-365. According to a team led by Stephane Vennes of the Astronomical Institute of Czech Academy of Sciences in Ondrejov, Czech Republic, that’s a type Iax supernova. It only partially destroyed a white dwarf leaving a part that moves at a very high speed and has an abnormal composition for that dead star type.

The jellyfish galaxy JO204 (mage ESO/GASP collaboration)

An article published in the journal “Nature” describes a research that shows a new function of the “tentacles” of the so-called jellyfish galaxies. An international team of astronomers led by Bianca Poggianti of the INAF-Astronomical Observatory of Padua in Italy used the observations conducted during ESO’s GASP program with the MUSE instrument installed on the Very Large Telescope (VLT), discovering that the mechanism that generates those tentacles is the same that powers the supermassive black holes at the center of those galaxies.

The supernova SN 2017cbv and the galaxy NGC 5643 (Image courtesy B.J. Fulton)

An article published in “Astrophysical Journal Letters” describes the observation of the collision of the supernova SN 2017cbv with a companion. A team of astronomers observed for the first time the details of this type of cosmic event that happened in the NGC 5643 galaxy and was spotted on Earth on March 10, 2017. This is due to the possibility of observing it for five days with the Las Cumbres Observatory (LCO) obtaining data suggesting that the companion was a normal star with a radius about 20 times the Sun’s.

Artist's concept of the the TRAPPIST-1 system seen from an area near TRAPPIST-1f (Image NASA/JPL-Caltech)

An article to be pulished in “The Astrophysical Journal” describes a research on the age of the TRAPPIST-1 system. This ultra-cool dwarf star has become increasingly popular thanks to the results of research on its planets. One of the problems was to establish its age and astronomer Adam Burgasser of the University of California, San Diego, and Eric Mamajek of NASA’s JPL provided an estimate between 5.4 and 9.8 billion years.

Artist's concept of the orbits of 3 stars near the supermassive black hole at the center of the Milky Way (Image ESO/M. Parsa/L. Calçada)

An article published in “The Astrophysical Journal” describes an analysis of the motions of stars that orbit the supermassive black hole at the center of the Milky Way, particularly the one known as S2. A team of astronomers applied a new analytical technique to observations conducted in the past with ESO’s Very Large Telescope (VLT) in Chile and other telescopes concluding that those orbits are influenced by the effects of Albert Einstein’s theory of general relativity.