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Core-collapse explosions of massive stars leave behind neutron stars, with aknown diversity that includes the "Central Compact Objects" (CCOs). Typified bythe neutron star discovered near the centre of the Cas A supernova remnant(SNR), CCOs have been observed to shine only in X-rays. To address theirsupernova progenitors, we perform a systematic study of SNRs that contain a CCOand display X-ray emission from their shock-heated ejecta. We make use of X-raydata primarily using the Chandra X-ray observatory, complemented withXMM-Newton. This study uses a systematic approach to the analysis of each SNRaimed at addressing the supernova progenitor as well as the explosionproperties (energy and ambient density). After fitting for the ejectaabundances estimated from a spatially resolved spectroscopic study, we comparethe data to six nucleosynthesis models making predictions on supernova ejectayields in core-collapse explosions. We find that the explosion models commonlyused by the astrophysics community do not match the ejecta yields for any ofthe SNRs, suggesting additional physics, e.g. multi-dimensional explosionmodels or updated progenitor structures, are required. Overall we find low-mass($\leq$25 solar masses) progenitors among the massive stars population andlow-energy explosions ($<$10$^{51}$ ergs). We discuss degeneracies in our modelfitting, particularly how altering the explosion energy affects the estimate ofthe progenitor mass. Our systematic study highlights the need for improving onthe theoretical models for nucleosynthesis predictions as well as forsensitive, high-resolution spectroscopy observations to be acquired withnext-generation X-ray missions.

Progenitors and Explosion Properties of Supernova Remnants Hosting  Central Compact Objects: II. A Global Systematic Study with a Comparison to  Nucleosynthesis Models