NASA Telescopes Reveal Hidden Properties of X-Ray Pulsar RX J0032.9-7348

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NASA Telescopes Reveal Hidden Properties of X-Ray Pulsar RX J0032.9-7348

Pulsars are neutron stars rotating rapidly, emitting electromagnetic radiation in various wavelengths, including radio waves, optical, X-ray, and gamma-ray. Identified as a X ray transient source in the Small Magellanic Cloud (SMC) about 30 years ago, RX J0032.9-7348 has been classified as an X-ray Pulsar after detecting X-ray pulsations with a ******* of approximately 7.02 seconds after experiencing an X-ray brightening in October 2024.To take a closer look at it, astronomers have incorporated two NASA X-ray telescope, NICER and NuSTAR.

Discovery and Observational Campaign

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to Handbook of X-ray and Gamma ray Astrophysics, Accretion-powered X-ray pulsars (XRPs) are neutron stars within binary systems that emit X-rays in regular pulses, powered by the accretion of matter from a companion star. However, although RX J0032.9-7348 has been known for decades, very little is known regarding its properties and its optical counterpart has not been identified. Therefore, a team of astronomers led by Birendra Chhotaray of the Physical Research Laboratory (PRL) in Ahmedabad, India, decided to take a closer look at this pulsar with NuSTAR and NICER.
Dr Chhotaray and his team were able to verify the X-ray pulsation ******* of RX J0032.9-7348 through their observations and they also discovered that this pulsar has a double-peak pulse profile throughout a wide energy range, with small changes in the form of energy dependence.

Findings

Results of the observational campaign,

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on the arXiv preprint server, gives insight of the spin dynamics and luminosity of this pulsar. The accretion processes during the X-ray brightening phase increases its angular momentum. It results into a spin-up of approximately -0.00033 seconds per day.
The luminosity of the pulsar varied from 8.2 undecillion to 37 undecillion erg/s during the monitoring campaign. The researchers report that no evidence of iron emission line or cyclotron resonance scattering features was found in the energy spectrum of this source.

 

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