Close, bright and boxy: the superluminous SN 2018hti
arXiv:2111.07142 · doi:10.1093/mnras/stac744
Abstract
SN 2018hti was a very nearby (z=0.0614) superluminous supernova with an exceedingly bright absolute magnitude of -21.7 mag in r-band at maximum. The densely sampled pre-maximum light curves of SN 2018hti show a slow luminosity evolution and constrain the rise time to ~50 rest-frame days. We fitted synthetic light curves to the photometry to infer the physical parameters of the explosion of SN 2018hti for both the magnetar and the CSM-interaction scenarios. We conclude that one of two mechanisms could be powering the luminosity of SN 2018hti; interaction with ~10 Msun of circumstellar material or a magnetar with a magnetic field of B_p~1.3e13 G and initial period of P_spin~1.8 ms. From the nebular spectrum modelling we infer that SN 2018hti likely results from the explosion of a ~40 Msun progenitor star.
31 pages, 19 figures, replaced after acceptance by MNRAS (minor revisions compared to the previous version)
References in corpus (30)
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- Pulsational Pair-Instability Supernovae
- Pulsational pair instability as an explanation for the most luminous supernovae
- PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
- The magnetar model for Type I superluminous supernovae I: Bayesian analysis of the full multicolour light curve sample with MOSFiT
- Spectroscopy of superluminous supernova host galaxies. A preference of hydrogen-poor events for extreme emission line galaxies
- Shell-shocked diffusion model for the light curve of SN2006gy
- PTF11iqb: Cool supergiant mass loss that bridges the gap between Type IIn and normal supernovae
- Anomalous extinction behaviour towards the Type Ia SN 2003cg
- Absolute-Magnitude Distributions of Supernovae
- Investigating the properties of stripped-envelope supernovae, what are the implications for their progenitors?
- ESC Supernova spectroscopy of non-ESC targets
- Setting UBVRI Photometric Zero-Points Using Sloan Digital Sky Survey ugriz Magnitudes
- A new measurement of the Hubble constant using Type Ia supernovae calibrated with surface brightness fluctuations
- Hydrogen-Poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey
- The Rise Time of Type Ia Supernovae from the Supernova Legacy Survey
- Superluminous Supernovae Powered by Magnetars: Late-time Light Curves and Hard Emission Leakage
- The host galaxy of the super-luminous SN 2010gx and limits on explosive nickel-56 production
- An ultraviolet excess in the superluminous supernova Gaia16apd reveals a powerful central engine
- Magnetar-powered superluminous supernovae must first be exploded by jets
- Gamma-ray Thermalization and Leakage from Millisecond Magnetar Nebulae: Towards a Self-Consistent Model for Superluminous Supernovae
- An extremely energetic supernova from a very massive star in a dense medium
- The Luminous and Double-Peaked Type Ic Supernova 2019stc: Evidence for Multiple Energy Sources
- SN 2012aa - a transient between Type Ibc core-collapse and superluminous supernovae
- SN 2017gci: a nearby Type I Superluminous Supernova with a bumpy tail
- Photospheric Velocity Gradients and Ejecta Masses of Hydrogen-poor Superluminous Supernovae -- Proxies for Distinguishing between Fast and Slow Events
- A unified accreting magnetar model for long-duration gamma-ray bursts and some stripped-envelope supernovae
- SN 2018hti: a nearby superluminous supernova discovered in a metal-poor galaxy
- SN 2008iy circumstellar interaction: Bright and lesser light effect
- SN 2019hcc: A Type II Supernova Displaying Early O II Lines
Cited by in corpus (4)
- Polarimetry of Hydrogen-Poor Superluminous Supernovae
- Pre-maximum spectroscopic diversity of hydrogen-poor superluminous supernovae
- Exploring GRBs and supernovae connection: does a superluminous hypernova population exist?
- Hard X-ray Observations of the Hydrogen-poor Superluminous Supernova SN 2018hti with NuSTAR