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Stellar Tidal Disruptions by Newborn Neutron Stars or Black Holes: A Mechanism for Hydrogen-poor (Super)luminous Supernovae and Fast Blue Optical Transients by Tsuna, Daichi; Lu, Wenbin is a scholarly article available to read on EtoBox.

What is Stellar Tidal Disruptions by Newborn Neutron Stars or Black Holes: A Mechanism for Hydrogen-poor (Super)luminous Supernovae and Fast Blue Optical Transients about?

Hydrogen-poor supernovae (SNe) of Type Ibc are explosions of massive stars that lost their hydrogen envelopes, typically due to interactions with a binary companion. We consider the case where the natal kick imparted to the neutron star (NS) or black hole (BH) remnant brings the compact object to a collision with a main-sequence companion, eventually leading to full tidal disruption of the companion. Subsequently, super-Eddington accretion onto the NS/BH launches a powerful, fast wind which collides with the SN ejecta and efficiently converts the kinetic energy of the wind into radiation. The radiation is reprocessed by the surrounding ejecta into a luminous ($\sim 10^{44}$ erg s$^{-1}$ at peak), days to months-long transient with optical peaks from $-19$ to $-21$ mag, comparable to (super)luminous Type Ibc SNe and fast blue optical transients (FBOTs) like AT2018cow. From a Monte-Carlo analysis we estimate the fraction of tidal disruptions following SNe in binaries to be $\sim 0.1$--$1$\%, roughly compatible with the event rates of these luminous SNe. At the broad-brush level, our model reproduces the multi-wavelength and spectral observations of FBOTs, and has the potential to exp

Author

Tsuna, Daichi; Lu, Wenbin

Published

2025

Language

EN