PoS - Proceedings of Science
Volume 425 - The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022) - Stars and interstellar medium
Accretion Induced Collapse of White Dwarfs as an Alternative Symbiotic Channel to Millisecond Pulsars
A.A.Β Taani
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Pre-published on: September 29, 2022
Published on: β€”
Recently, extra motivation has been given to the investigations of an unresolved problem of
millisecond pulsars (MSPs) produced by the recycling process, as an apparent role of the accretion induced
collapse (AIC) in white dwarfs (WDs) was suggested to this concern. I have found that the
distribution of the orbital periods of binary MSPs in the Galactic disk (π‘π‘œπ‘π‘ ,π‘œπ‘Ÿπ‘) closely follows
an exponential distribution. I have also determined the best-fit mean value of π‘π‘œπ‘π‘ ,π‘œπ‘Ÿπ‘ by fitting
our data with an exponential distribution for the MSP population. As a result, it can be stated that
reaching the Chandrasekhar limit may cause an explosion of a massive WD as a Type Ia supernova
(in the case of a CO WD) or ignition of a ONeMg WD, and possibly merging in some CO
WDs, all resulting in peculiar MSP systems. A possible formation scenario, where the system has
a circular orbit during this evolutionary stage, is discussed.
DOI: https://doi.org/10.22323/1.425.0050
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