Swift J1818.0–1607 is a young magnetar and soft gamma repeater, with an estimated age between 240 and 500 years. For context, other magnetars have a characteristic age of less than 200,000 years.[3] This means that this neutron star could be one of the youngest neutron stars and magnetars detected so far. It is located at a distance of 4800-8100 parsecs from Earth in the Constellation of Sagittarius.[4] It has a mass of about two solar masses packed into a region of space more than a trillion times smaller making it extremely dense.[5]Observations revealed that Swift J1828.0-1607 had a spin period of 1.36 seconds.[6]
Swift J1828.0-1607 has a very dynamic magnetosphere which is inferred from its variability in its shape and polarization properties. It may also provide a crucial link between High-magnetic field radio pulsars and magnetars.[7]
Discovery
It was discovered by NASA's Neil Gehrels Swift Observatory when it exhibited an X-ray burst on 12 March 2020.[6][4] Further observations detected pulsed radio emissions making Swift J1828.0-1607 only the fifth radio-loud magnetar discovered.[7]
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