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We present the last version of {\scshape{Hyperion}} (HYdrodynamic PpmExplosion with Radiation diffusION), a hydrodynamic code designed to calculatethe explosive nucleosynthesis, remnant mass and light curve associated to theexplosion of a massive star. By means of this code we compute the explosion ofa subset of red supergiant models, taken from the database published by\cite{lc18}, for various explosion energies in the range $\rm \sim0.20-2.00~10^{51}~erg$. The main outcomes of these simulations, i.e., remnantmass, $\rm ^{56}Ni$ synthesized, luminosity and length of the plateau of thebolometric light curve, are analyzed as a function of the initial parameters ofthe star (mass and metallicity) and of the explosion energy. As a firstapplication of {\scshape{Hyperion}} we estimated the mass and the metallicityof the progenitor star of SN 1999em, a well studied SN IIP, by means of thelight curve fitting. In particular, if the adopted distance to the host galaxyNGC 1637 is $\rm 7.83~Mpc$, the properties of the light curve point toward aprogenitor with an initial mass of $\rm 13~M_\odot$ and a metallicity[Fe/H]=-1. If, on the contrary, the adopted distance modulus is $\rm 11.7~Mpc$,all the models with initial mass $13\leq M/M_\odot\leq 15$ and metallicities$\rm -1\leq [Fe/H] \leq 0$ are compatible with the progenitor of SN 1999em.

astrophysical journal/the astrophysical journal

Hydrodynamical modeling of the light curves of core collapse supernovae  with HYPERION. I. The mass range 13-25 Msun, the metallicities -3<=[Fe/H]<=0  and the case of SN1999em