Can the central compact object in HESS J1731--347 be indeed the lightest neutron star observed?

Shu-Rui Zhang, Jorge A. Rueda, Rodrigo Negreiros

The exceptionally low mass of $0.77_{-0.17}^{+0.2}{M}_{\odot }$ for the central compact object (CCO) XMMU J173203.3 -- 344518 (XMMU J1732) in the supernova remnant (SNR) HESS J1731 -…