Implications of post-kick jets in core-collapse supernovae

ABSTRACT I examine the assumption that jets shape axisymmetrical morphological features of core-collapse supernova (CCSN) remnants are post-kick jets, i.e. neutron star (NS) launches these after explosion and it acquired its natal kick velocity. find this implies pre-collapse cores CCSN progenitors have sufficient angular momentum fluctuations to support jittering explode star. From finding shaping-jets neither tend be aligned with velocity nor perpendicular argue has following implications. (1) The NS accretes mass at a radius $r_{\rm acc} \approx 5000 {~\rm km}$ from centre $\approx 10 s}$ explosion. (2) required accreted gas explain medium values jets-kick angles also an intermittent pre-kick accretion disc, just before during Such disc is likely launch in frame mechanism. This suggests most last mechanism rather than jets. (3) expects black holes small velocities.