SN 2012ec: mass of the progenitor from PESSTO follow-up of the photospheric phase

Abstract

We present the results of a photometric and spectroscopic monitoring campaign of SN 2012ec, which exploded in the spiral galaxy NGC 1084, during the photospheric phase. The photometric light curve exhibits a plateau with luminosity L= 0.9 x 10^{42} erg/s and duration ~90 days, which is somewhat shorter than standard Type II-P supernovae. We estimate the nickel mass as 0.040 +/- 0.015 Msun from the luminosity at the beginning of the radioactive tail of the light curve. The explosion parameters of SN 2012ec were estimated from the comparison of the bolometric light curve and the observed temperature and velocity evolution of the ejecta with predictions from hydrodynamical models. We derived an envelope mass of 12.6 Msun, an initial progenitor radius of 1.6 x 10^{13} cm and an explosion energy of 1.2 foe. These estimates agree with an independent study of the progenitor star identified in pre-explosion images, for which an initial mass of M=14-22 Msun was determined. We have applied the same analysis to two other type II-P supernovae (SNe 2012aw and 2012A), and carried out a comparison with the properties of SN 2012ec derived in this paper. We find a reasonable agreement between the masses of the progenitors obtained from pre-explosion images and masses derived from hydrodynamical models. We estimate the distance to SN 2012ec with the Standardized Candle Method (SCM) and compare it with other estimates based on other primary and secondary indicators. SNe 2012A, 2012aw and 2012ec all follow the standard relations for the SCM for the use of Type II-P SNe as distance indicators.

Accepted for publication in MRAS on Jan. 14, 2015

References in corpus (14)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovae
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• SN 2005cs in M51 II. Complete Evolution in the Optical and the Near-Infrared
• Photometric and Spectroscopic Properties of Type II-P Supernovae
• The Standardized Candle Method for Type II Plateau Supernovae
• Towards a Cosmological Hubble Diagram for Type II-P Supernovae
• An optimal hydrodynamic model for the normal Type IIP supernova 1999em
• SN 2006bp: Probing the Shock Breakout of a Type II-P Supernova
• Progenitor mass of the type IIP supernova 2005cs
• The Type IIP Supernova 2012aw in M95: hydrodynamical modelling of the photospheric phase from accurate spectrophotometric monitoring
• Supersolar Ni/Fe production in the Type IIP SN 2012ec
• Precision Measurement of The Most Distant Spectroscopically Confirmed Supernova Ia with the Hubble Space Telescope
• Ejecta and progenitor of the low-luminosity Type IIP supernova 2003Z

Cited by in corpus (20)

• Distances to PHANGS Galaxies: New Tip of the Red Giant Branch Measurements and Adopted Distances
• The PHANGS-HST Survey: Physics at High Angular resolution in Nearby GalaxieS with the Hubble Space Telescope
• The Berkeley sample of Type II supernovae: BVRI light curves and spectroscopy of 55 SNe II
• Radiation-hydrodynamical modelling of underluminous type II plateau Supernovae
• Constraints on explosive silicon burning in core-collapse supernovae from measured Ni/Fe ratios
• After the Fall: Late-Time Spectroscopy of Type IIP Supernovae
• Progenitors of low-luminosity Type II-Plateau supernovae
• SN 2016X: A Type II-P Supernova with A Signature of Shock Breakout from Explosion of A Massive Red Supergiant
• Stripped-envelope core-collapse supernova ${}^{56}$Ni masses: Persistently larger values than supernovae type II
• The Iron Yield of Normal Type II Supernovae
• Planetary Nebula Luminosity Function distances for 19 galaxies observed by PHANGS-MUSE
• The Evolution of Temperature and Bolometric Luminosity in Type-II Supernovae
• Type II Supernovae as Distance Indicators at Near-IR Wavelengths
• The low-luminosity type II SN\,2016aqf: A well-monitored spectral evolution of the Ni/Fe abundance ratio
• SN 2018gj: A Short-plateau Type II Supernova with Persistent Blue-shifted H-alpha Emission
• PHANGS-ALMA: Arcsecond CO(2-1) Imaging of Nearby Star-Forming Galaxies
• The Extremely Metal-Poor SN 2023ufx: A Local Analog to High-Redshift Type II Supernovae
• Spectropolarimetry of Type II supernovae (I) Sample, observational data and interstellar polarization
• Building spectral templates and reconstructing parameters for core collapse supernovae with CASTOR
• A graph-based spectral classification of Type II supernovae