Top panel: particle spectra of all CRs released from the SNR, integrated from the time of the SN explosion to t_SNR,end. The SNR ages at t_SNR,end are 15.5 kyr, 5.8 kyr, 6.1 kyr, and 2.9 kyr corresponding to the 8 M_⊙ SN IIP (red), 15 M_⊙ SN IIP (green), 20 M_⊙ SN IIL/b (blue), and 25 M_⊙ SN Ib/c (cyan) scenarios. Bottom panel: the particle spectra of CRs that have diffused in a homogeneous environment from the SNR to 30 pc (solid lines) and 100 pc (dashed lines) distance. These spectra are obtained by multiplying the CR density at 30 pc and 100 pc with the volume of MC-J1729 (4/3πR³,R = 7.8 pc) and the volume of MC-core (R = 7.2 pc), respectively.