CSQCD2026

Mass Defect in Accretion Induced Phase Transitions to the Third Family of Compact Stars

20 May 2026, 16:35

2h

Venue

Poster Posters

Speaker

Dhrubajyoti Rakshit (Faculty of Physics and Astronomy, University of Wrocław)

Description

We revisit the procedure to construct hybrid star EoS introduced in [1] in order to predict sequences of third families of compact stars, based on a non-local chiral quark model equation of state.

The goal of our study is to find a hybrid EoS which maximises the mass defect occurring in the accretion-induced transition from a hadronic star to its hybrid star twin configuration at 1.4 $M_⊙$. This EoS should also fulfil the NICER radius constraint $R_{2.0} \ge 11$ km for PSRJ0740+6620 [2].

Such a hybrid star EoS can explain the occurrence of eccentric orbits in low mass X-ray binaries according to the scenario developed in [3].

[1] D. Alvarez-Castillo et al., PRD 99, 063010 (2019)
[2] Dittmann et al., ApJ 974, 295 (2024)
[3] S. Chanlaridis et al., A&A 695, A16 (2025)