Astronomers have published a fortuitous discovery of a new millisecond pulsar as a part of observational operations using the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The recently detected pulsar has a spin period of about 2.77 ms and acquired designation PSR J1431−6328. The findings are published in a paper August 8 on the arXiv pre-print repository.
Pulsars are incredibly magnetized, rotating neutron stars emitting a beam of electromagnetic radiation. The most quickly rotating pulsars, with rotation periods below 30 milliseconds, is known as millisecond pulsars (MSPs).
One among methods to establish new pulsars is looking for the circularly polarized emission that is nearly bizarre to things of this kind. A staff of astronomers led by David L. Kaplan of the University of Wisconsin-Milwaukee employed this method utilizing ASKAP.
The researchers have identified an extremely polarized steep spectrum level source, indicated ASKAP 143121.2−632809, in a far pointing with ASKAP at 888 MHz. After discarding the stellar origin of this newly found supply, they classified it as a new MSP and gave it the label PSR J1431−6328.
As noted within the paper, the newly identified pulsar has a spin interval of roughly 2.77 ms and dispersion measure at a degree of about 228.27 parsecs/cm3. The pulsar’s mass is estimated to be around 1.4 solar masses.
Like more than half of known MSPs, PSR J1431−6328 was discovered to have a companion star. The astronomers believe that the secondary star could be a white dwarf with an estimated mass of about 0.31 solar masses. The system’s interval was calculated to be most likely 64.3 days.
The researchers were famous that though PSR J1431−6328 doesn’t but appear to be particularly outstanding, it was relatively hard to find. This is because of its short spin period, comprehensive profile, and high dispersion measure, which makes it challenging to find it by conventional blind periodicity searches.