# Quark Novae: An Alternative Channel For the Formation of Isolated Millisecond Pulsars

## TL;DR

This paper investigates the formation of isolated millisecond pulsars through quark novae, proposing a new formation channel and estimating its galactic birthrate using population synthesis models.

## Contribution

It introduces quark novae as an alternative formation mechanism for IMSPs and provides quantitative estimates of their galactic birthrate.

## Key findings

- QN-produced IMSPs are more common than merger-produced ones.
- High-eccentricity millisecond pulsar binaries may originate from partially disrupted LMXBs.
- Estimated galactic birthrate of QN-produced IMSPs ranges from 9.5e-6 to 1.7e-4 per year.

## Abstract

Isolated millisecond pulsars (IMSPs) are a topic of academic contention. There are various models to explain their formation. We explore the formation of IMSP via quark novae (QN). During this formation process, low-mass X-ray binaries (LMXBs) are disrupted when the mass of the neutron star (NS) reaches 1.8 $\rm M_\odot$. Using population synthesis, this work estimates that the Galactic birthrate of QN-produced IMSPs lies between $\sim 9.5\times10^{-6}$ and $\sim1.7\times10^{-4}$ $\rm yr^{-1}$. The uncertainties shown in our experiment model is due to the QN's kick velocity. Furthermore, our findings not only show that QN-produced IMSPs are statistically more significant than those produced by mergers, but also that millisecond pulsar binaries with a high eccentricity may originate from LMXBs that have been involved in, yet not disrupted by, a QN.