Critical collapse mass M_crit as a function of rotation period P. The blue and gray curves correspond to the GP and ndu models, respectively. The data of PSR J0952–0607 (R. W. Romani et al. 2022), the companion of PSR J0514–4002E (E. D. Barr et al. 2024), and the secondary stars of GW190814 and GW200210 (R. Abbott et al. 2023) are shown for comparison.