The runaway star Zeta Ophiuchi and its bow shock

An article accepted for publication in the journal “Astronomy and Astrophysics” reports a study on the star Zeta Ophiuchi, a so-called runaway star that became famous even beyond the field of astronomy for its bow shock, the enormous shock wave similar to the waves generated in the water by the bow of a ship. A team of researchers led by Samuel Green from the Institute for Advanced Studies in Dublin, Ireland, built detailed computer models of the bow shock to try to explain the observed data. The results confirm the origins of Zeta Ophiuchi but only partially explain the X-ray emissions detected.

The Wentian module blasting off atop a Long March-5B Y3 rocket (Photo courtesy Xinhua/Yang Guanyu)

A confirmation has arrived that the Wentian module has successfully completed its docking maneuvers with the Chinese Tiangong space station’s Tianhe core module. Wentian was launched about 13 hours earlier from the Wenchang base atop a Long March-5B Y3 rocket. A few hours after docking, the taikonauts, as the Chinese call their astronauts, of the Shenzhou-14 mission entered the new module. This is another crucial step in the construction of the Chinese space station.

Artistic concept of gravitationally bound binary systems (Image NASA/JPL-Caltech/UCLA)

An article published in the journal “Monthly Notices of the Royal Astronomical Society Letters” offers a number of clues about the triple system TIC 470710327 being the result of a stellar merger. A team of researchers used the HERMES spectrograph mounted on the Mercator Telescope for follow-up observations of this system, which was discovered thanks to NASA’s TESS space telescope, a discovery that was announced in an article published in April 2022 in the journal “Monthly Notices of the Royal Astronomical Society”. Computer simulations led the researchers to conclude that originally there were two gravitationally-bound binary systems and in one of them, the two stars merged into one that ended up forming a triple system with the other two.

Artist's representation of the VFTS 243 system

An article published in the journal “Nature Astronomy” reports the discovery of a probable dormant black hole in the Large Magellanic Cloud, one of the dwarf galaxies satellite of the Milky Way. A team of researchers spotted it in the VFTS 243 system after a thorough examination of a binary system located in the Tarantula Nebula in which a candidate was identified to be tested in the search for black holes. Six years of observations conducted with ESO’s VLT allowed to rule out other possible explanations for the nature of the objects studied. An interesting conclusion is that the black hole discovered is the result of a collapse of the parent star that occurred without a supernova.