On February 23, 1987, astronomers noticed an incredibly bright stellar explosion, also known as a supernova. using the Atacama Large Millimeter / Submillimeter Array (ALMA), researchers believe that they have discovered that the remnant of the explosion is a superdense corpse called a neutron star hidden within the dust of supernovae.
High-resolution ALMA images showed what the researchers described as a warm “blob” that is brighter than its surroundings and lies on the dusty core of the supernova. If confirmed, it neutron star According to a statement, the youngest person to date would be.
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An astrophysicist from Cardiff University and a researcher who saw the blob, “Mikako Matsuura,” we were very surprised to see this hot blob created by a thick cloud of dust in the supernova remnant. The statement said. “There must be something in the cloud that has heated the dust and that makes it shine. That’s why we suggested that there is a neutron star hidden inside the dust cloud.”
Their conclusions were Published in November 2019, In The Astrophysical Journal. At the time, however, researchers could not definitively say what the glow blob was, because it was believed that the neutron is too bright to be a star.
A new paper provides an explanation for that brightness in a neutron star: the glow drop corresponds to the thermal emission from a very young neutron star which according to the statement is still warmer than the supernova explosion.
“Despite the supreme complexity of a supernova explosion and extreme conditions ruling the interior of a neutron star, the detection of a hot drop of dust is confirmed by several predictions,” Dan Page, an astronomer at the National Autonomous University in Mexico, Said in the statement. Page led the new study, which was Published on 30 July In The Astrophysical Journal.
Researchers estimate that the 15.5-mile (25-kilometer) wide neutron star has a temperature of about 9 million degrees Fahrenheit (5 million degrees Celsius), which provides enough energy to explain the brightness of the blob. The study also shows that the neutron star is located off-center, as researchers expected, due to the powerful stellar explosion.
Before now, neutron stars remained elusive, surrounded by a thick cloud of dust supernovae, which led scientists to wonder if a black hole had formed in the wake of the explosion. However, on the day of the explosion in 1987, sub-atomic particles Known as neutrino, Which had almost no mass on Earth, suggested the neutron stars formed after the collapse of the star.
“The neutron star behaves exactly as we expect,” said James Latimer, a member of Page’s research team at Stoin Brook University in New York. “Those neutrinos suggested that A. Black hole never made, And furthermore find a black hole difficult to explain the observed brightness of the blob. We compared all the possibilities and concluded that a hot neutron star is the most likely explanation. ”
At just 33 years old, this neutron star will be found to be the youngest. The next youngest is 330 years old, located in a neutron star Supernova remnant Cassiopeia a. Researchers hope to image this infant neutron star directly in the form of dust and gas in supernova remnants over the next few decades, providing definitive evidence that the star exists.
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