Progenitor mass of the type IIP supernova 2005cs

TL;DR

This paper estimates the progenitor mass of supernova 2005cs using hydrodynamic modeling and compares it with pre-explosion observations, revealing systematic differences that suggest a need to revise current progenitor models for type IIP supernovae.

Contribution

It provides the first detailed hydrodynamic modeling of supernova 2005cs and compares the progenitor mass estimates with pre-explosion data, highlighting discrepancies in current methods.

Findings

Hydrodynamic modeling yields a progenitor mass of 18.2 Msun for SN 2005cs.

Hydrodynamic estimates tend to be higher than pre-explosion image estimates.

Systematic overestimation suggests a need to revise progenitor models for type IIP supernovae.

Abstract

The progenitor mass of type IIP supernova can be determined from either hydrodynamic modeling of the event or pre-explosion observations. To compare these approaches, we determine parameters of the sub-luminous supernova 2005cs and estimate its progenitor mass. We compute the hydrodynamic models of the supernova to describe its light curves and expansion velocity data. We estimate a presupernova mass of 17.3 Msun, an explosion energy of 4.1x10^{50} erg, a presupernova radius of 600 Rsun, and a radioactive Ni-56 mass of 0.0082 Msun. The derived progenitor mass of SN 2005cs is 18.2 Msun, which is in-between those of low-luminosity and normal type IIP supernovae. The obtained progenitor mass of SN 2005cs is higher than derived from pre-explosion images. The masses of four type IIP supernovae estimated by means of hydrodynamic modeling are systematically higher than the average progenitor mass for the 9-25 Msun mass range. This result, if confirmed for a larger sample, would imply that a serious revision of the present-day view on the progenitors of type IIP supernovae is required.