Calibration of neutron star natal kick velocities to isolated pulsar observations

Abstract

Current prescriptions for supernova natal kicks in rapid binary population synthesis simulations are based on fits of simple functions to single pulsar velocity data. We explore a new parameterization of natal kicks received by neutron stars in isolated and binary systems developed by Mandel & Müller, which is based on 1D and 3D supernova simulations and accounts for the physical correlations between progenitor properties, remnant mass, and the kick velocity. We constrain two free parameters in this model using very long baseline interferometry velocity measurements of Galactic single pulsars. We find that the inferred values of natal kick parameters do not differ significantly between single and binary evolution scenarios. The best-fit values of these parameters are $v_{\mathrm{ns}}=520$ km s${}^{-1}$ for the scaling pre-factor for neutron star kicks, and ${\sigma }_{\mathrm{ns}}=0.3$ for the fractional stochastic scatter in the kick velocities.

8 pages, 8 figures, 1 table. Updated to match MNRAS version

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• A Black Hole Kicked At Birth: MAXI J1305-704
• Three-dimensional radiation hydrodynamics simulations of wandering intermediate-mass black holes considering the anisotropic radiation and dust sublimation
• A kinematically constrained kick distribution for isolated neutron stars
• The Galactic population of magnetars : a simulation-based inference study
• Natal kicks of compact objects
• Implications of post-kick jets in core collapse supernovae
• Astrometric microlensing probes of the isolated neutron star population with Roman