Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae
arXiv:2109.14572 · doi:10.1093/mnras/stab2864
Abstract
The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.
Accepted for publication in MNRAS
References in corpus (20)
- The Zwicky Transient Facility: System Overview, Performance, and First Results
- Initial Performance of the NEOWISE Reactivation Mission
- PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
- unWISE: unblurred coadds of the WISE imaging
- 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
- The Dynamics of Neutrino-Driven Supernova Explosions after Shock Revival in 2D and 3D
- Investigating the properties of stripped-envelope supernovae, what are the implications for their progenitors?
- The properties of the "standard" type Ic supernova 1994I from spectral models
- Superluminous supernova 2015bn in the nebular phase: evidence for the engine-powered explosion of a stripped massive star
- Herschel-ATLAS/GAMA: a census of dust in optically selected galaxies from stacking at submillimetre wavelengths
- Super Luminous Supernovae as standardizable candles and high redshift distance probes
- From core collapse to superluminous: The rates of massive stellar explosions from the Palomar Transient Factory
- Modelling the Type Ic SN 2004aw: a Moderately Energetic Explosion of a Massive C+O Star without a GRB
- 2D radiation-hydrodynamic simulations of supernova ejecta with a central power source
- SN 2012aa - a transient between Type Ibc core-collapse and superluminous supernovae
- Extracting high-level information from gamma-ray burst supernova spectra
- Observations and Spectral Modelling of the Narrow-Lined Type Ic SN 2017ein
- PTF11rka: an interacting supernova at the crossroads of stripped-envelope and H-poor super-luminous stellar core collapses
- SN 2019hcc: A Type II Supernova Displaying Early O II Lines