Considered the first black hole ever found, a star in the constellation Cygnus located 6,100 light-years from Earth has long attracted the attention of astronomers for emitting X-rays and is therefore called Cygnus X-1. On Thursday (3), the researchers went a step further and published research by the Imaging X-Ray Polarimeter Explorer (IXPE) observatory. measures the polarization of X-rays in these objects🇧🇷
Because our atmosphere filters out most of the X-rays, the observations were made via IXPE, which orbits the earth at an altitude of 540 km. Cygnus X-1 discovered by accidentWhen a pair of Geiger counters are placed on a rocket and it receives very strong radiation signals from that region of space.
No form of light, not even X-ray light, can escape the event horizon of a black hole. Emissions from the hot substance – plasma – “sprouted” in a region with a diameter of 2 thousand kmaround the limit where the escape velocity exceeds the speed of light.
How did scientists manage to “observe” the black hole’s X-ray binary?
A black hole X-ray binary (XRB) system is formed when gas from an ordinary star accumulates in an ancient gravitationally collapsing star. This gas gets hot enough to emit X-rays.🇧🇷 This allowed IXPE to constrain the geometry of the plasma and read its shape and position during simultaneous observations with NASA’s NICER and NuSTAR observatories in May and June 2022.
According to lead author Henric Krawczynski, a professor at the University of Washington, St. According to Louis, these observations had previously measured “the direction of arrival, time of arrival, and X-ray energy of hot plasma simply spinning toward black holes.”
However, the new study “It also measures its linear polarization, which provides information about how X-rays are emitted. — and where and where they scatter material near the black hole.” This better understanding of the geometry of the surrounding plasma can reveal a lot about black holes.
ARTICLE 🇧🇷 Science – DOI: 10.1126/science.add5399.
Source: Tec Mundo
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