Scientists from Germany, China, Italy, and Canada have concluded a twenty-year study on the PSR J1905+0154A system. By combining data from the Arecibo Observatory and the FAST radio telescope, experts created a motion model of the millisecond pulsar—a neutron star rotating once every 3.19 milliseconds. This is reported by Ixbt.com reports .
A team led by the Max Planck Institute for Radio Astronomy and the Chinese Academy of Sciences discovered that this pulsar is moving at 123 kilometers per second relative to the NGC 6749 star cluster. This figure is 10 times higher than the escape velocity for this cluster, suggesting the object is being ejected or is a transient visitor.
A key stage of the research was identifying the pulsar's companion: a helium white dwarf. Found using the Hubble Space Telescope, this star has a mass of 17–19% of the Sun. By analyzing its cooling process, scientists were able to study the system's active period 400–700 million years ago.
The low density of the NGC 6749 cluster allowed astrophysicists to accurately measure the pulsar's magnetic field and true age (approximately 3 billion years). This discovery provides a unique opportunity to test stellar evolution laws and understand how exotic binaries form in low-density environments.
Read “Zamin” on Telegram!
