ALMA Finds Possible Sign of Neutron Star in Supernova 1987A

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ALMA Finds Possible Sign of Neutron Star in Supernova 1987A

Post by bystander » Thu Jul 30, 2020 4:23 pm

ALMA Finds Possible Sign of Neutron Star in Supernova 1987A
ALMA | National Radio Astronomy Observatory | 2020 Jul 30
Two teams of astronomers have made a compelling case in the 33-year-old mystery surrounding Supernova 1987A. Based on observations of the Atacama Large Millimeter/submillimeter Array (ALMA) and a theoretical follow-up study, the scientists provide new insight for the argument that a neutron star is hiding deep inside the remains of the exploded star. This would be the youngest neutron star known to date.

Ever since astronomers witnessed one of the brightest explosions of a star in the night sky, creating Supernova 1987A (SN 1987A), they have been searching for a compact object that should have formed in the leftovers from the blast.

Because particles known as neutrinos were detected on Earth on the day of the explosion (23 February 1987), astronomers expected that a neutron star had formed in the collapsed center of the star. But when scientists could not find any evidence for that star, they started to wonder whether it subsequently collapsed into a black hole instead. For decades the scientific community has been eagerly awaiting a signal from this object that has been hiding behind a very thick cloud of dust.

Recently, observations from the ALMA radio telescope provided the first indication of the missing neutron star after the explosion. Extremely high-resolution images revealed a hot “blob” in the dusty core of SN 1987A, which is brighter than its surroundings and matches the suspected location of the neutron star. ...

NS 1987A in SN 1987A ~ Dany Page et al High Angular Resolution ALMA Images of Dust and Molecules in the SN 1987A Ejecta ~ Phil Cigan et al
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