Gamma-ray pulsations detected from pulsar PSR J1835−3259B

Tomasz Nowakowski is a member of the physics.org community.

A new millisecond pulsar known as PSR J18353259B has been investigated by Chinese astronomy. They were able to identify the pulsations from this source. There is a paper on the arXiv pre-print server.

Nuclear stars emit a beam of radiation. The most rapidly rotating pulsars are known as millisecond pulsars. Astronomers think that they are formed in a pair of systems when one component becomes a neutron star and the other becomes a star.

There is a recently discoveredMSP in a cluster. It has a spin period of less than a second and is in a circle around the cluster. It is thought that the distance to the pulsar is over 30,000 light years.

A team of astronomy led by Pengfei Zhang of Yunnan University in Kunming, China, inspected PSR J18353259B in hopes of finding an emission similar to the one found in NGC 6652. They analyzed the data from the large area telescope.

The timing analysis of the LAT data was done based on the radio ephemeris of the PSR J1835-34B.

The team was able to detect the pulsation from PSR J18353259B based on the data from 14 years ago. The results show that this MSP has a similar profile to the radio one.

The observed gamma-ray emission is most likely caused by PSR J18353259B, according to the astronomer. There is no obvious offpulse phase range in the pulse profile and the gamma-ray emission is weak, so the scientists can't say if there is emission from other MSPs.

According to the authors of the paper, this would be a similar case to the two GCs, where one brightMSP contributes most to the observed emission. If this scenario is true, PSR J18353259B would have a luminosity of 50 decillion erg/s and agamma-ray efficiency of 0.12.

"Based on different studies of the sources in the GC, the observed -ray emission from the GC could mainly arise from this MSP," the astronomer said.

More information: Discovery of gamma-ray pulsations of PSR J1835−3259B in the Globular Cluster NGC 6652, arXiv:2206.13667 [astro-ph.HE] arxiv.org/abs/2206.13667

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