Tomasz Nowakowski is a writer for Phys.org.
A rare double neutron star millisecond pulsar has been discovered. Two stars are circling one another every 1.8 days in the newly discovered PSR J1325 The paper was published on arXiv.org.
The most rapidly rotating pulsars, those with rotation periods below 30 milliseconds, are known as millisecond pulsars. It is assumed that they are formed in a pair of systems when one component becomes a neutron star and the other becomes a secondary star.
There are some pulsars that have two neutron stars. They are one of the most important classes of objects used to test and understand many astrophysical and fundamental physics phenomena.
The newest addition to this short list of objects has been reported by the astronomer led by Rahul Sengar of the Swinburne University of Technology in Australia. The source was found in a reprocessing of a survey.
The time-domain resampling method was used in the reprocessing of the HTRU-S LowLat survey. The researchers explained that the 72 minutes of full-time resolution data were searched coherently with a series of constant acceleration trials.
The study found that PSR J1325 is a MSP with a spin period of 28.9 ms and a orbital period of 1.81 days. The astronomer supposes that the companion object is likely another neutron star with a mass of around 1.2 solar mass, because of the low but significant orbital eccentricity, recycled nature and high total mass.
According to the study, PSR J1325 has a dispersion measure of 303.3 pc/ cm 3 and a spin-down luminosity of 78 erg/s. The age of this pulsar was found to be 0.94 billion years, while the distance to this object was at least 14,300 light years.
The researchers pointed out that the orbital eccentricity of PSR J1325 is the lowest among any known DNS system in a wide circle. The low eccentricity along with the wide orbit of PSR J1325 suggests that this is a result of a supernova explosion.
The authors of the paper concluded that the orbital period was probably only marginally shorter prior to the explosion.
More information: R. Sengar et al, The High Time Resolution Universe Pulsar Survey—XVII. PSR J1325−6253, a low eccentricity double neutron star system from an ultra-stripped supernova. arXiv:2204.06869v1 [astro-ph.HE], arxiv.org/abs/2204.06869The Science X Network will be launched in 2022.
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