Scientists recorded the event with the Chandra and XMM-Newton telescopes in early February - then previously unknown
The mass of GSN 069 is 400 thousand times the mass of the Sun, it belongs to the category of supermassive black holes. The object is located at a distance of 250 thousand light years from Earth.
Observations showed that when approaching blackits hole, gravity tore the upper layers of the star, turning it into a white dwarf - the next stage of star evolution after the red giant. But after this, for some unknown reason, a black hole pushed the object into distant orbit.
Now the white dwarf rotates in an ellipticalorbit around a black hole, making a complete revolution every eight hours. At the same time, GSN 069 is gradually pulling matter out of the star - this means that in the near future it will die anyway.
"The star will struggle to leave, butthere is no salvation. The black hole will eat it more slowly, but will never stop, even after the white dwarf shrinks to the size of Jupiter. It will happen in about a trillion years. ”
Andrew King, lead author of the study
Earlier astronomers from the University of Iowa duringObservations of seismic fluctuations in the bowels of two red giants revealed that the orbit of an exoplanet orbiting one of them is so small that it floats inside rarefied but hot outer shells of the star. In other words, it is actually inside the star.