Utilizing the MeerKAT radio telescope, a global group of astronomers has noticed a Galactic globular cluster often called NGC 6522. Consequently, they’ve found two new remoted pulsars on this cluster. The discovering is reported in a paper printed October 5 on the pre-print server arXiv.
Pulsars are extremely magnetized, rotating neutron stars emitting a beam of electromagnetic radiation. Astronomers looking for new pulsars focus their observations on globular clusters (GCs), as such gravitationally certain collections of stars are very best factories for the formation of a big number of astronomical objects.
Just lately, a gaggle of astronomers led by Federico Abbate of the Max Planck Institute for Radio Astronomy in Bonn, Germany, has carried out a seek for new pulsars in NGC 6522 as a part of the MeerTIME and TRansients And PUlsars with MeerKAT (TRAPUM) initiatives.
NGC 6522 is a core-collapsed Galactic GC at a distance of about 25,100 light years, with a mass of about 300,000 solar lots. Its age is estimated to be 12 billion years, subsequently it might be the oldest star cluster within the Milky Way galaxy.
“On this manuscript we report the invention of two new remoted pulsars in NGC 6522 in observations made with the MeerKAT telescope,” the researchers wrote.
The group found two remoted pulsars and designated them PSR J1803−3002E and PSR J1803−3002F. With this discovering, the total variety of identified pulsars in NGC 6522 is now six, and all of them are remoted.
PSR J1803−3002E is a mildly recycled millisecond pulsar (MSP) with a spin interval of roughly 17.9 milliseconds, discovered close to the middle of NGC 6522. Its dispersion measure was discovered to be round 192.8 laptop/cm3.
PSR J1803−3002F is a sluggish pulsar with a spin interval of about 148.1 milliseconds at a distance of some three core radii from the middle of the cluster. The dispersion measure of this pulsar was estimated to be 195.8 laptop/cm3.
The researchers famous that the spin period of the 2 newly detected pulsars is greater than that of the beforehand identified ones. They added that the attribute age of PSR J1803−3002F could also be smaller than the age of NGC 6522.
The research additionally discovered that one of many millisecond pulsars beforehand recognized in NGC 6522, designated PSR J1803−3002C, might have a small attribute age of solely 132 million years. If confirmed, this pulsar would have one of many smallest attribute ages among the many identified MSPs in globular clusters.
“The presence of a sluggish pulsar and an apparently younger MSP, each uncommon in GCs, means that their formation could be linked to the evolutionary stage of the cluster,” the authors of the paper concluded.
Extra info:
A MeerKAT view of the pulsars within the globular cluster NGC 6522, arXiv (2023). DOI: 10.48550/arxiv.2310.03800
Journal info:
arXiv
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Two new pulsars detected in globular cluster NGC 6522 (2023, October 16)
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