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Twice heavier than the sun: you discover the most massive neutron star in the universe



A team of US astronomers has identified the most massive neutron star of all time. According to his study, published in the journal Nature Astronomy, the star, christened J0740 + 6620, was detected approximately 4,600 light-years from Earth.

Its mass is 2.14 times larger than that of the Sun, but is concentrated in a sphere of about 25 kilometers in diameter. According to scientists, their measurements could represent the boundaries of how solid and compact a single object can become without becoming a black hole.


<img class = "read-more__cover" src = "https://cdni.rt.com/actualidad/public_images/2019.09/thumbnail/5d7a1205e9ff71573c7f6fde.jpg" alt = "The center of galaxy GSN 069. [19659004] Neutron stars are formed when large stars explode and disintegrate into small spheres, with the exception of the black holes, which are the densest star remnants known to us.

J0740 + 6620 is a pulsar, a special type of neutron star that emits radiant rays from its magnetic poles Because these poles are focused on the earth, scientists can regularly observe the star as a cosmic "beacon," despite the enormous distance that separates it from our planet.

A Dwarf Companion

The Pulsar has a companion star, of which Scientists believe that he is a white dwarf, another type of star remnant that is not as dense as neutron stars or black holes n 2014 to 2019 with the Green Bank Telescope in West Virginia (USA).

The researchers were able to calculate the mass of the pulsar based on its interactions with its white dwarf companion. As the two objects orbit their immense gravity deforms the space around them which distorts the radiation impulses emitted by J0740 + 6620.

The light of the pulsar wanders a bit further As a result of this distortion, which was named after the astrophysicist Irwin Shapiro, who first described it in 1964, the "Shapiro delay" was named.

The team estimated the mass of the White Dwarf, which in turn allowed them to calculate the mass of the pulsar, revealing that J0740 + 6620 is the largest neutron star known to scientists.


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