An international team of astronomers reports the discovery of a new millisecond pulsar in a globular cluster
Pulsars are highly magnetizedrotating neutron stars that emit a beam of electromagnetic radiation. The fastest spinning pulsars, with rotation periods of less than 30 milliseconds, are known as millisecond pulsars (MSPs). Astronomers believe they form in binary systems. ;when an initially more massive component turns into a neutron star, which then spins up due to the accretion of material from the secondary star.
Detection graph PSR J1835-3259B.
Image Credit & Copyright: Gautam et al., 2022
Now a group of astronomers led by Tasha Gautamfrom the Max Planck Institute for Radio Astronomy in Bonn, Germany, discovered another MSP as part of an upgraded survey of the Giant Meter Radio Telescope (uGMRT). During radio observations of eight globular clusters at 400 MHz and 650 MHz with the new GMRT Wideband system Backend (GWB) uGMRT they discovered that NGC 6652 contains a rapidly rotating pulsar.
In this article, we present the results of a reviewGC pulsars, which we performed using the new broadband uGMRT receivers to search for pulsars with a steep spectrum at frequencies of 400 MHz and 650 MHz. We observed eight GCs and searched in each cluster for isolated and binary pulsar systems with segmented and full-scale methods of acceleration and search for jerks. We have discovered a new binary system MSP, J1835-3259B, in NGC 6652,” the researchers explained.
PSR J1835−3259B is the first pulsar discovered by uGMRT. It has a rotation period of about 1.83 milliseconds, an orbital period of about 1.2 days, and a dispersion index of about 63.5 pc/cm³.
The results of the study show that PSRJ1835−3259B is a wide-orbital binary system with a relatively low eccentricity. Astronomers estimate that the characteristic age of this MSP is at least 430 million years, and the strength of its surface magnetic field does not exceed 350 million Gauss.
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