A global look into the world of interacting supernovae

Abstract

Interacting supernovae (SNe) IIn and Ibn show narrow emission lines and have always been a mysterious and unsolved genre in SNe physics. We present a comprehensive analysis of the temporal and spectroscopic behaviour of a group of interacting SNe~IIn and Ibn. We choose SNe~2012ab, 2020cui, 2020rc and 2019uo as representative members of these SN sub-types to probe the nature of explosion. Our study reveals that SNe~IIn are heterogeneous, bright depicting multi-staged temporal evolution while SNe~Ibn are moreover homogeneous, comparatively fainter than SNe~IIn and short lived, but limited in sample to firmly constrain the homogeneity. The spectroscopic features display a great diversity in H$\alpha$ and He profiles for both SNe~IIn and Ibn. The representative SN~Ibn also show flash ionisation signatures of CIII and NIII. Modelling of H$\alpha$ reveals that SNe~IIn have in general an asymmetric CSM which interacts with SN ejecta resulting in diversity in H$\alpha$ profiles.

9 pages, 8 figures, Accepted for Special Issue of Journal of Astrophysics and Astronomy, 2022, Astrophysical jets and observational facilities: National perspective, 05 -09 April 2021, ARIES Nainital

References in corpus (10)

• A giant outburst two years before the core-collapse of a massive star
• SN 1994W: An Interacting Supernova or Two Interacting Shells?
• Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae
• A population of highly energetic transient events in the centres of active galaxies
• SN 2009kn - the twin of the Type IIn supernova 1994W
• Endurance of SN 2005ip after a decade: X-rays, radio, and H-alpha like SN 1988Z require long-lived pre-supernova mass loss
• Massive stars exploding in a He-rich circumstellar medium. V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006
• Flash ionization signatures in the type Ibn supernova SN 2019uo
• On the optical counterpart of NGC300 X-1 and the global Wolf-Rayet content of NGC300
• Photometric and spectroscopic evolution of the peculiar Type IIn SN 2012ab