KSP-SN-2016kf: a long-rising H-rich Type II Supernova with unusually high ${}^{56}$Ni mass discovered in the KMTNet Supernova Program

Abstract

We present the discovery and the photometric and spectroscopic study of H-rich Type II supernova (SN) KSP-SN-2016kf (SN2017it) observed in the KMTNet Supernova Program in the outskirts of a small irregular galaxy at $z\simeq 0.043$ within a day from the explosion. Our high-cadence, multi-color ($BVI$) light curves of the SN show that it has a very long rise time ($t_{\text{rise}}\simeq 20$ days in $V$ band), a moderately luminous peak ($M_V\simeq -$17.6 mag), a notably luminous and flat plateau ($M_V\simeq -$17.4 mag and decay slope $s\simeq 0.53$ mag per 100 days), and an exceptionally bright radioactive tail. Using the color-dependent bolometric correction to the light curves, we estimate the ${}^{56}$Ni mass powering the observed radioactive tail to be $0.10\pm 0.01$ M${}_{\odot }$, making it a H-rich Type II SN with one of the largest ${}^{56}$Ni masses observed to date. The results of our hydrodynamic simulations of the light curves constrain the mass and radius of the progenitor at the explosion to be $\sim$15 M${}_{\odot }$ (evolved from a star with an initial mass of $\sim$ 18.8 M${}_{\odot }$) and $\sim 1040$ R${}_{\odot }$, respectively, with the SN explosion energy of $\sim 1.3\times 10^{51}$ erg s${}^{-1}$. The above-average mass of the KSP-SN-2016kf progenitor, together with its low metallicity $Z/Z_{\odot }\simeq 0.1-0.4$ obtained from spectroscopic analysis, is indicative of a link between the explosion of high-mass red supergiants and their low-metallicity environment. The early part of the observed light curves shows the presence of excess emission above what is predicted in model calculations, suggesting there is interaction between the ejecta and circumstellar material. We further discuss the implications of the high progenitor initial mass and low-metallicity environment of KSP-SN-2016kf on our understanding of the origin of Type II SNe.

arXiv comment18 pages, 12 figures, accepted for publication in ApJ

References in corpus (84)

• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• The chemical composition of the Sun
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Correcting for the Effects of Interstellar Extinction
• Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
• Progenitors of core-collapse supernovae
• Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
• Mass Loss: Its Effect on the Evolution and Fate of High-Mass Stars
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• The death of massive stars - I. Observational constraints on the progenitors of type II-P supernovae
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars
• The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and Te-based literature data
• The Expulsion of Stellar Envelopes in Core-Collapse Supernovae
• The Second-Generation Guide Star Catalog: Description and Properties
• The Effective Temperature Scale of Galactic Red Supergiants: Cool, But Not As Cool As We Thought
• Progenitor-Explosion Connection and Remnant Birth Masses for Neutrino-Driven Supernovae of Iron-Core Progenitors
• An Empirical Relation between Sodium Absorption and Dust Extinction
• Observed and Physical Properties of Core-Collapse Supernovae
• Shock Breakout in Dense Mass Loss: Luminous Supernovae
• The First Systematic Study of Type Ibc Supernova Multi-band Light Curves
• Seeing the Collision of a Supernova with its Companion Star
• An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars
• Early supernovae light-curves following the shock-breakout
• Confined Dense Circumstellar Material Surrounding a Regular Type II Supernova: The Unique Flash-Spectroscopy Event of SN 2013fs
• Characterizing the V-band light-curves of hydrogen-rich type II supernovae
• Wave-Driven Mass Loss in the Last Year of Stellar Evolution: Setting the Stage for the Most Luminous Core-Collapse Supernovae
• The diversity of Type II supernova versus the similarity in their progenitors
• A Wolf-Rayet-like progenitor of supernova SN 2013cu from spectral observations of a wind
• Bolometric light curves and explosion parameters of 38 stripped-envelope core-collapse supernovae
• Photometry and Spectroscopy of the Type IIP SN 1999em from Outburst to Dust Formation
• The search for failed supernovae with the Large Binocular Telescope: confirmation of a disappearing star
• Stellar evolution with rotation XII: Pre-supernova models
• The Spectroscopic Diversity of Type Ia Supernovae
• SN 2005cs in M51 II. Complete Evolution in the Optical and the Near-Infrared
• The Broad-lined Type Ic SN 2003jd
• Flash Spectroscopy: Emission Lines from the Ionized Circumstellar Material around $<10$-Day-Old Type II Supernovae
• The Landscape of the Neutrino Mechanism of Core-Collapse Supernovae: Neutron Star and Black Hole Mass Functions, Explosion Energies and Nickel Yields
• The early UV/Optical emission from core-collapse supernovae
• Pre-Supernova Outbursts via Wave Heating in Massive Stars I: Red Supergiants
• The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity
• Towards Characterization of the Type IIP Supernova Progenitor Population: a Statistical Sample of Light Curves from Pan-STARRS1
• Underluminous Type II Plateau Supernovae: II. Pointing towards moderate mass precursors
• Measuring the Progenitor Masses and Dense Circumstellar Material of Type II Supernovae
• The delay of shock breakout due to circumstellar material seen in most Type II Supernovae
• Caltech Core-Collapse Project (CCCP) Observations of Type II Supernovae: Evidence for Three Distinct Photometric Subtypes
• The Progenitor Dependence of the Preexplosion Neutrino Emission in Core-Collapse Supernovae
• The Initial Masses of the Red Supergiant Progenitors to Type-II Supernovae
• Optical Spectroscopy of Type Ia Supernovae
• The Core-collapse rate from the Supernova Legacy Survey
• Circumstellar dust as a solution to the red supergiant supernova progenitor problem
• The early detection and follow-up of the highly obscured Type II supernova 2016ija/DLT16am
• The Balmer decrement of SDSS galaxies
• Bolometric Corrections for optical light curves of Core-collapse Supernovae
• On The Intrinsic Diversity of Type II-Plateau Supernovae
• Pre-Supernova Outbursts via Wave Heating in Massive Stars II: Hydrogen-poor Stars
• The Nickel Mass Distribution of Normal Type II Supernovae
• Short-Lived Circumstellar Interaction in the Low-Luminosity Type IIP SN 2016bkv
• Type II supernova energetics and comparison of light curves to shock-cooling models
• Supernova radiative-transfer modeling: A new approach using non-LTE and full time dependence
• Metallicity at the explosion sites of interacting transients
• SN 2009ib: A Type II-P Supernova with an Unusually Long Plateau
• Measuring Expansion Velocities in Type II-P Supernovae
• Type II-Plateau supernovae as metallicity probes of the Universe
• Type II supernovae as probes of environment metallicity: observations of host HII regions
• Long-rising Type II supernovae from PTF and CCCP
• SN2013fs and SN2013fr: Exploring the circumstellar-material diversity in Type II supernovae
• Oblique Shock Breakout in Supernovae and Gamma-Ray Bursts: I. Dynamics and Observational Implications
• Observed Type II supernova colours from the Carnegie Supernova Project-I
• Dwarf Galaxy Discoveries from the KMTNet Supernova Program I. The NGC 2784 Galaxy Group
• The importance of 56Ni in shaping the light curves of type II supernovae
• Monte Carlo Method for Calculating Oxygen Abundances and Their Uncertainties from Strong-Line Flux Measurements
• Type II supernovae in low luminosity host galaxies
• Exploring the efficacy and limitations of shock-cooling models: new analysis of Type II supernovae observed by the Kepler mission
• Shock Dynamics in Stellar Outbursts: I. Shock formation
• Hydrogen-rich Core Collapse Supernovae
• Optical and Ultraviolet Observations of the Very Young Type IIP SN 2014cx in NGC 337
• Metallicity from Type II Supernovae from the (i)PTF
• SN 2016esw: a luminous Type II supernova observed within the first day after the explosion
• Aspherical Supernovae: Effects on Early Light Curves
• Difference in dwarf galaxy surface brightness profiles as a function of environment
• Discovery of a rapid, luminous nova in NGC 300 by the KMTNet Supernova Program

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