Galaxies

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.

An article published in the journal “Astronomy & Astrophysics” describes a research involving 16 of the brightest known quasars. A team of researchers led by the Italian National Institute of Astrophysics (INAF) examined in particular those quasars’ infrared emissions to identify young hot stars in the galaxies hosting them concluding that a lot of them are forming, at a rate up to about 4,000 times higher than in the Milky Way.

Artist's concept of the dusty starburst galaxy WISE J224607.57-052635.0 (Image NASA/JPL-Caltech)

An article published in “The Astrophysical Journal” describes a research suggesting that in primeval galaxies of the type called dusty starburst – because dust filters their light – star formation activity can be inhibited by the presence of a quasar. A team of astronomers from Iowa University used the ALMA radio telescope to locate the quasars and then other telescopes to observe them at various wavelengths.

The galaxy SGAS J111020.0+645950.8 (Image NASA, ESA, and T. Johnson (University of Michigan))

Three articles published in “The Astrophysical Journal Letters” describe various aspects of the observation of the galaxy SGAS J111020.0+645950.8, 11 billion light years away from Earth, with the Hubble Space Telescope. So much attention is due to the fact that the team of astronomers who conducted this study had to use a gravitational lens to conduct the observations and use a very sophisticated analysis to sharpen the images, which also show star formation areas.

NGC 5194 and NGC 5195

An article submitted for publication in the journal “Monthly Notices of the Royal Astronomical Society” describes a research on the supermassive black hole at the center of the galaxy NGC 5195, which is undergoing some sort of indigestion. Using data collected with various telescopes, a team of astronomers at the University of Manchester discovered that the black hole causes chaotic events in its galaxy. Among the causes there’s its interaction with a much larger galaxy called NGC 5194 or Whirlpool galaxy.