After scouring its historical VLITE data, the U.S. Naval Research Laboratory has confirmed that a magnetar discovered in 2022 is real and has been pulsing regularly every 22 minutes since 1988.
Magnetars are a type of neutron star with super powerful magnetic fields. This particular magnetar sends out a pulse of radio waves every 22 minutes like clockwork, and what's even more odd is that, according to what we currently know about these types of stars, it shouldn't be able to send out radio waves at all.was developed in collaboration with the National Radio Astronomy Observatory in 2014.
Initially, it was implemented to constantly monitor the Earth’s ionosphere to study disturbances that can affect it, such as geomagnetic storms, seismic events, and gravity waves. This constant surveillance can detect transient blips and bursts of radio waves from elusive cosmic sources without continuous observation. Understanding these phenomena may lead astronomers to a better understanding of the Universe.
In 2022, a group of astronomers worldwide found a strange object in space using a different telescope system. They named this object GPM J1839-10. After hearing about this, the team at the Naval Research Laboratory went back and checked their data and found that they had also picked up signals from this object for many years without realizing what they were seeing.
The extraordinary thing about this object, GPM J1839-10, is that it behaves unlike anything we've seen before. “This enigmatic object has been hiding in the data for decades – we just did not know we had to look for it until its discovery by the MWA,” said Dr. Simona Giacintucci, NRL Research Astronomer. "GPM J1839-10 emits a five-minute pulse of radio wavelength emission every 22 minutes, and it's been doing this for at least 33 years," she added.
Astronomers believe GPM J1839−10 is a rare neutron star with extremely powerful magnetic fields. “Astronomy is one of those bizarre professions where we cannot go to our objects to study them,” Clarke said. “We are interested in how many of these are and where they are. That is directing future research", she said.
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