Simulating the Negative Jet Feedback Mechanism in Common Envelope Jet Supernovae

We use the stellar evolution code MESA to study the negative jet feedback mechanism in common envelope jet supernovae (CEJSNe), in which a neutron star (NS) launches jets in the envelope of a red supergiant (RSG). We find that the feedback reduces the mass accretion rate to be chi (j) similar or equal to 0.04-0.3 times the mass accretion rate without the operation of jets. We mimic the effect of the jets on the RSG envelope by depositing the energy that the jets carry into the envelope zones outside the NS orbit. The energy deposition inflates the envelope, therefore reducing the density in the NS vicinity, which in turn reduces the mass accretion rate in a negative feedback cycle. In calculating the above values for the negative jet feedback coefficient (the further reduction in the accretion rate) chi (j), we adopt the canonical ratio of jet power to actual accretion power of 0.1, and the results of numerical simulations that show the actual mass accretion rate to be a fraction of 0.1-0.5 of the Bondi-Hoyle-Lyttleton mass accretion rate.

Automated summary

This study investigates the negative jet feedback mechanism in common envelope jet supernovae using the MESA code. The feedback reduces the mass accretion rate to be 0.04-0.3 times the original rate, and this reduction is explained by the energy deposition from the jets inflating the envelope and decreasing the density near the neutron star.