– 15 new millisecond pulsars discovered in 47 Tucanae, bringing the total to 42 confirmed pulsars in the cluster.
– Pulsar spin periods range from 1.88 to 13.03 milliseconds; majority (12) are in binary systems with low-mass companions.
– The fastest known pulsar overall remains PSR J1748-2446ad, spinning at 716 Hz (716 times per second).
When using the MeerKAT radio telescope, a team of astronomers has recently uncovered 15 new millisecond pulsars. These celestial bodies sit about 13,000 light-years away from Earth, inside the globular cluster known as 47 Tucanae. The finding adds a notable chapter to the study of dense, rapidly spinning stars in that crowded region of the galaxy.
Discovery details and context
Pulsars are neutron stars with a diameter of roughly 20 kilometers and a mass around 1.5 times that of the Sun, which makes them incredibly dense and fast rotators. Led by Weiwei Chen from the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn, Germany, the team announced the identification of 15 millisecond pulsars, sometimes referred to as MSPs. These MSPs boast spin periods that span from 1.88 to 13.03 milliseconds, marking them as some of the most rapidly spinning stellar remnants known.
Binary and isolated pulsars
Among the newly found pulsars, 12 are in binary systems with low-mass companions, while the rest are isolated. This mix helps researchers explore how interactions in dense cluster environments affect pulsar formation and evolution. The discovery therefore enhances the census of 47 Tucanae, bringing the total confirmed pulsars in this cluster to 42. Further observations are needed to deepen understanding and potentially uncover more similar objects in the future.
Comparison and notable milestones
Even with these exciting finds, the fastest pulsar ever detected remains PSR J1748-2446ad, which lies about 18,000 light-years away and spins at an extraordinary 716 times per second. This record-setting object underscores the extreme physics at work in millisecond pulsars and the capacity of modern radio telescopes to probe such rapid rotations. The new MSPs from 47 Tucanae add valuable data points for models of neutron star spin evolution and cluster dynamics.
- Spin periods: 1.88 to 13.03 milliseconds
- Binary status: 12 binary pulsars, rest isolated
- Total known pulsars in 47 Tucanae after discovery: 42
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