Supernova Fallback as Origin of Neutron Star Spins and Spin-kick Alignment

Abstract

Natal kicks and spins are characteristic properties of neutron stars (NSs) and black holes (BHs). Both offer valuable clues to dynamical processes during stellar core collapse and explosion. Moreover, they influence the evolution of stellar multiple systems and the gravitational-wave signals from their inspiral and merger. Observational evidence of possibly generic spin-kick alignment has been interpreted as indication that NS spins are either induced with the NS kicks or inherited from progenitor rotation, which thus might play a dynamically important role during stellar collapse. Current three-dimensional supernova simulations suggest that NS kicks are transferred in the first seconds of the explosion, mainly by anisotropic mass ejection and, on a secondary level, anisotropic neutrino emission. In contrast, the NS spins are only determined minutes to hours later by angular momentum associated with fallback of matter that does not become gravitationally unbound in the supernova. Here, we propose a novel scenario to explain spin-kick alignment as a consequence of tangential vortex flows in the fallback matter that is accreted mostly from the direction of the NS's motion. For this effect the initial NS kick is crucial, because it produces a growing offset of the NS away from the explosion center, thus promoting onesided accretion. In this new scenario conclusions based on traditional concepts are reversed. For example, pre-kick NS spins are not required, and rapid progenitor-core rotation can hamper spin-kick alignment. We also discuss implications for natal BH kicks and the possibility of tossing the BH's spin axis during its formation.

38 pages, 9 figures, 1 table; includes new Sect.2 summarizing observations and new Fig. 8; considerably extended because of comments by referee and readers; accepted by ApJ

References in corpus (36)

• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• Switched magnetospheric regulation of pulsar spin-down
• Large Merger Recoils and Spin Flips From Generic Black-Hole Binaries
• Slowing the Spins of Stellar Cores
• Three-dimensional core-collapse supernova simulated using a 15 $M_{\odot }$ progenitor
• Three-Dimensional Simulations of Core-Collapse Supernovae: From Shock Revival to Shock Breakout
• Pulsar spins from an instability in the accretion shock of supernovae
• Neutrino-driven supernova of a low-mass iron-core progenitor boosted by three-dimensional turbulent convection
• The Explosion of Helium Stars Evolved With Mass Loss
• Neutrino emission characteristics and detection opportunities based on three-dimensional supernova simulations
• Three-dimensional Models of Core-collapse Supernovae From Low-mass Progenitors With Implications for Crab
• Angular Momentum Transport via Internal Gravity Waves in Evolving Stars
• Hydrodynamical Neutron Star Kicks in Three Dimensions
• Fitting Pulsar Wind Tori. II. Error Analysis and Applications
• Black hole formation and fallback during the supernova explosion of a $40{\mathrm{M}}_{\odot }$ star
• Supernova Fallback: A Possible Site for the r-Process
• The Origin and Motion of PSR J0538+2817 in S147
• Evidence for alignment of the rotation and velocity vectors in pulsars. II. Further data and emission heights
• Asteroseismology of evolved stars to constrain the internal transport of angular momentum II. Test of a revised prescription for transport by the Tayler instability
• Modeling of Magneto-Rotational Stellar Evolution I. Method and first applications
• Discovery of an OB Runaway Star Inside SNR S147
• PSR J2222--0137. I. Improved physical parameters for the system
• Supernova 1987A: 3D Mixing and light curves for explosion models based on binary-merger progenitors
• The imprints of the last jets in core collapse supernovae
• Implications of turbulence for jets in core-collapse supernova explosions
• Three-dimensional Hydrodynamics Simulations of Precollapse Shell Burning in the Si- and O-rich Layers
• Toward an Empirical Theory of Pulsar Emission XI. Understanding the Orientations of Pulsar Radiation and Supernova "Kicks"
• On the Angular Momentum Transport Efficiency within the Star Constrained from Gravitational-wave Observations
• Is the Birth of PSR J0538+2817 Accompanied by a Gamma-ray Burst?
• Magnetic field induced neutrino chiral transport near equilibrium
• A 3D Kinematic Study of the Northern Ejecta "Jet" of the Crab Nebula
• A supernova remnant association for the fast-moving pulsar PSR J0908-4913
• A necessary condition for supernova fallback invading newborn neutron-star magnetosphere
• Stochastic Core Spin-Up in Massive Stars -- Implications of 3D Simulations of Oxygen Shell Burning
• Impact of rotation on the evolution of convective vortices in collapsing stars
• The first evidence for three-dimensional spin-velocity alignment in pulsars

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