Eclipsing binary millisecond pulsar PSR J1740-5340 -- evolutionary considerations and observational test

Abstract

We perform evolutionary calculations for a binary system with initial parameters: $M_{sg,i}$= 1$M\odot$ and $M_{ns,i}$= 1.4 $M\odot$ and $P_{orb,i}(RLOF)$= 1.27 d to produce observed binary parameters for the PSR J1740--5340. Our calculations support model proposed by D'Amico et al. (2001) in which this binary may be progenitor of a millisecond pulsar + helium white dwarf system. We propose observational test to verify this hypothesis. If the optical companion lack of carbon lines in its spectrum shows but the oxygen and nitrogen lines are present then our model correctly describes the evolutionary stage of PSR J1740--5340.

5 pages, 3 figures, uses aa.cls and graphicx, abstract, submitted to A&A at March 20

References in corpus (2)

• PSR J1740-5340: accretion inhibited by radio-ejection in a binary millisecond pulsar in the Globular Cluster NGC 6397
• The eclipsing millisecond pulsar PSR J1740-5340 and its red straggler companion

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• Searching for Spider-Like Pulsars from TESS Ellipsoidal Lightcurves with X-ray counterparts
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