A black hole found not far from Earth at about 1,550 light years with a mass 12 times that of the Sun. no doubt, black hole falls into the super large category.
Launch Science noticeAstronauts led by the University of Alabama Huntsville (UAH) recently discovered the black hole after studying Gaia Data Release 3 (DR3). This discovery also became an opportunity for astronomers.
The reason is that black holes offer the opportunity to study the laws of physics under very extreme conditions. In some cases, black holes play an important role in the formation and evolution of galaxies, for example in the super large black hole (SMBH), which is at the center of most large galaxies.
To find this black hole, the astronomers analyzed data from Gaia DR3, which includes information on nearly 200,000 binary stars, which was observed by the European Space Agency’s (ESA) Gaia Observatory.
Then, the research team went on to look at spectrographic measurements from other telescopes such as the Lick Observatory’s automated Planet Finder, Giant Magellan Telescope, and WM Keck Observatory in Hawaii.
The measurements show an important sequence of stars related to the force of gravity. “The attraction of the black hole to a star that resembles the Sun can be determined by spectroscopic measurements, which give us a line of sight due to the Doppler shift,” said Dr Chakrabari, who was involved in the study.
“By analyzing the line, we can draw conclusions about how large the black hole’s companion is, as well as the period of its rotation and how eccentric the orbit is. These spectroscopic measurements independently confirm Gaia’s solution, which also indicates that this binary system is it is composed of a visible star in orbit around it. ” the star is very big, “he said again.
According to Chakrabari, this black hole is a “non-interacting black hole”. This is different from an interacting black hole.
Interacting black holes are generally easy to observe in visible light because they are located in tighter orbits and attract material from their mates.
The material then forms a discoid shape around the black hole which is accelerated to a relative speed (close to the speed of light).
This creates a very powerful X-ray radiation. This is in contrast to non-interacting black holes, which usually have larger orbits and do not form discs.
Its presence must be detected by analyzing the movement of visible stars.
“Most black holes in binary systems are in binary X-rays. In other words, they become bright in X-rays due to interactions with their black holes, more often because black holes engulf other stars,” Chakrabarti said. reported by Universe today.
“When an object from another star falls into this gravity point, we can see an X-ray. In this case, we are looking at a black hole monster, but it is in a long orbital period of 185 days, or about half a day. year. It is very far from the visible star and makes no movement towards it. “
(lesimo / lesimo)
