Chinese Scientists Trace Origin of Young Halo Pulsar

Chinese astronomers have identified the likely origin of a young pulsar located in the halo of the Milky Way, providing new observational insights into how such objects are formed and evolve.

The research, published in the Astrophysical Journal, was conducted by scientists from the Xinjiang Astronomical Observatory under the Chinese Academy of Sciences.

Using long-term data from China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST), also known as the “China Sky Eye,” along with observations from the 26-meter Nanshan Radio Telescope, the team tracked subtle positional changes in the pulsar PSR J1740+1000. Combined measurements allowed them to estimate its spatial velocity at 329 ± 80 kilometres per second.

The findings suggest the pulsar may have originated within the galactic halo itself and could be the remnant of a “runaway” OB star that was ejected from its birthplace following a powerful stellar event.

In a separate discovery, the researchers identified multi-layered scintillation arc structures in the pulsar’s radio signals for the first time. This was achieved using combined observations from FAST and Australia’s Parkes radio telescope.

According to the study, these arc patterns likely result from ionised structures within the pulsar’s wind nebula. The discovery opens new avenues for studying both circumstellar and interstellar environments through pulsar emissions and improves understanding of how such extreme objects interact with surrounding space.