The metamorphosis of the Type Ib SN 2019yvr: late-time interaction

Abstract

We present observational evidence of late-time interaction between the ejecta of the hydrogen-poor Type Ib supernova (SN) 2019yvr and hydrogen-rich circumstellar material (CSM), similar to the Type Ib SN 2014C. A narrow Hα emission line appears simultaneously with a break in the light-curve decline rate at around 80-100 d after explosion. From the interaction delay and the ejecta velocity, under the assumption that the CSM is detached from the progenitor, we estimate the CSM inner radius to be located at ~6.5-9.1 {\times} 10^{15} cm. The Hα emission line persists throughout the nebular phase at least up to +420 d post-explosion, with a full width at half maximum of ~2000 km/s. Assuming a steady mass-loss, the estimated mass-loss rate from the luminosity of the Hα line is ~3-7 {\times} 10^{-5} M_\odot yr^{-1}. From hydrodynamical modelling and analysis of the nebular spectra, we find a progenitor He-core mass of 3-4 M{_\odot}, which would imply an initial mass of 13-15 M{_\odot}. Our result supports the case of a relatively low-mass progenitor possibly in a binary system as opposed to a higher mass single star undergoing a luminous blue variable phase.

8 pages, 5 figures, published in MNRAS

References in corpus (22)

• The Zwicky Transient Facility: Data Processing, Products, and Archive
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• Late-time spectral line formation in Type IIb supernovae, with application to SN 1993J, SN 2008ax, and SN 2011dh
• Towards a better understanding of the evolution of Wolf-Rayet stars and Type Ib/Ic supernova progenitors
• A Cool and Inflated Progenitor Candidate for the Type Ib Supernova 2019yvr at 2.6 Years Before Explosion
• SN 2006aj Associated with XRF 060218 At Late Phases: Nucleosynthesis-Signature of A Neutron Star-Driven Explosion
• Nebular phase observations of the type-Ib supernova iPTF13bvn favour a binary progenitor
• Statistical properties of the nebular spectra of 103 stripped envelope core collapse supernovae
• Nebular phase properties of supernova Ibc from He-star explosions
• Optical observations of the fast declining type Ib supernova iPTF13bvn
• Supernova Interaction with a Dense Detached Shell in SN 2001em
• An environmental analysis of the Type Ib SN 2019yvr and the possible presence of an inflated binary companion
• The changing-type SN 2014C may come from an 11-$M_{\odot }$ star stripped by binary interaction and violent eruption
• The morphing of decay powered to interaction powered Type II supernova ejecta at nebular times
• A UV census of the environments of stripped-envelope supernovae
• Seven Years of SN 2014C: a Multi-Wavelength Synthesis of an Extraordinary Supernova
• Modeling of the nebular-phase spectral evolution of stripped-envelope supernovae. New grids from 100 to 450 days
• Late-time H/He-poor circumstellar interaction in the type-Ic supernova SN 2021ocs: an exposed oxygen-magnesium layer and extreme stripping of the progenitor
• Searching for the expelled hydrogen envelope in Type I supernovae via late-time H-alpha emission
• SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?
• The Carnegie Supernova Project-I. Optical spectroscopy of stripped-envelope supernovae
• Discovery of the missing intermediate-mass helium stars stripped in binaries

Cited by in corpus (7)

• The Demographics of Binary Companions to Stripped-Envelope Supernovae: Confronting Observations with Population Synthesis
• The long-term influence of a magnetar power in stripped-envelope supernovae. Radiative-transfer modeling of He-star explosions from 1 to 10 years
• Large Cold Dust Reservoir Revealed in Transitional SN Ib 2014C by James Webb Space Telescope Mid-Infrared Spectroscopy
• The enigmatic double-peaked stripped-envelope SN 2023aew
• The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd: A clue to the mechanism of the helium-layer stripping
• An infrared echo from a circumstellar disk in the hydrogen- and helium-poor SN 2024aecx
• Late-time evolution of the interacting stripped-envelope supernova 2017dio