{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"2210fc684bb7348b539a7bb77bb1c255a73ef0fff58935733c12dde482f45f99","created":"2026-10-03T07:17:54Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"5fbfd522b646394a0b7bcd7c71cf0a27c9c091a474053645ae30e576604933d4","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"astro.core-collapse-supernovae.neutron-star-kicks","kind":"well-posed","literature_status":"partially-resolved","n":"1","parents":[],"plain":"Neutron stars are born moving hundreds of times faster than a rifle bullet and spinning, possibly because the explosion is lopsided.","posed_since":"","precise":"Determine whether asymmetric mass ejection (gravitational tug of slow ejecta) and anisotropic neutrino emission in 3D explosions reproduce the pulsar velocity distribution (mean $\\sim 4e7\\ \\mathrm{cm/s}$, tail above 1e8 cm/s), birth spin periods (tens to hundreds of ms) and any spin-kick alignment. Answer: predicted distributions from simulation suites compared with pulsar proper motions.","problem_ref":null,"references":"","settled_by":"Simulated kick and spin distributions statistically matching pulsar data, and remnant ejecta asymmetries (for example Ti-44 maps) correlated with kick direction.","status_note":"","title":"Origin of neutron star birth kicks and spins","topic_ref":"6ce88d543f229da8760987ece77815cb22f0cdd520afe70f0c6fe63515181dfc"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"03163298ad2b344d180d1db923c0dc1f97f1ccd48c26b702d7d2b2ad69d14301","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a31394abbe9db81c7d81785650400157e83487b2ca8ab75bd0f2a6f04e11e3ca","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"gIbw79iM64eCZZqgDTJ7Uzj88SZ3aOimr3af96xHEmeU1seF-QZB_4odDoKzF4139W_mS0rdoLNV82ZykU8lBg"},"schema":"pubphys.envelope/1"},"record_hash":"03163298ad2b344d180d1db923c0dc1f97f1ccd48c26b702d7d2b2ad69d14301","leaf_index":503}