Kinematic constraints on the ages and kick velocities of Galactic neutron star binaries

Abstract

The systems creating binary neutron stars (BNSs) experience systemic kicks when one of the components goes supernova. The combined magnitude of these kicks is still a topic of debate, and has implications for the eventual location of the transient resulting from the merger of the binary. For example, the offsets of short-duration gamma-ray bursts (SGRBs) resulting from BNS mergers depend on the BNS kicks. We investigated Galactic BNSs, and traced their motion through the Galaxy. This enabled us to estimate their kinematic ages and construct a BNS kick distribution, based on their Galactic trajectories. We used the pulsar periods and their derivatives to estimate the characteristic spin-down ages of the binaries. Moreover, we used a Monte Carlo estimation of their present-day velocity vector in order to trace back their trajectory and estimate their kinematic ages. These trajectories, in turn, were used to determine the eccentricity of their Galactic orbit. Based on simulations of kicked objects in the Galactic potential, we investigated the relationship between this eccentricity and kick velocity, in order to constrain the kicks imparted to the binaries at birth. We find that the Galactic BNSs are likely older than $\sim 40$ Myr, which means their current (scalar) galactocentric speeds are not representative of their initial kicks. However, we find a close relationship between the eccentricity of a Galactic trajectory and the experienced kick. Using this relation, we constrained the kicks of the Galactic BNSs, depending on the kind of isotropy assumed in estimating their velocity vectors. These kick velocities are well-described by a log-normal distribution peaking around $\sim 40-50$ km/s, and coincide with the peculiar velocities of the binaries at their last disc crossing.

arXiv comment22 pages, 15 figures, accepted for publication by A&A

References in corpus (86)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• galpy: A Python Library for Galactic Dynamics
• A statistical study of 233 pulsar proper motions
• Gamma-Ray Bursts as the Death Throes of Massive Binary Stars
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Tests of general relativity from timing the double pulsar
• Short-Duration Gamma-Ray Bursts
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• The mass distribution and gravitational potential of the Milky Way
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• A Comprehensive Study of Binary Compact Objects as Gravitational Wave Sources: Evolutionary Channels, Rates, and Physical Properties
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• A kilonova as the electromagnetic counterpart to a gravitational-wave source
• The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
• A "kilonova" associated with short-duration gamma-ray burst 130603B
• Birth and Evolution of Isolated Radio Pulsars
• Formation of Double Neutron Star Systems
• Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
• The Velocity Distribution of Isolated Radio Pulsars
• The Combined Ultraviolet, Optical, and Near-Infrared Light Curves of the Kilonova Associated with the Binary Neutron Star Merger GW170817: Unified Data Set, Analytic Models, and Physical Implications
• GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
• An r-Process Kilonova Associated with the Short-Hard GRB 130603B
• Formation Rates of Black Hole Accretion Disk Gamma-Ray Bursts
• The Pulsar Kick Velocity Distribution
• A Kilonova Following a Long-Duration Gamma-Ray Burst at 350 Mpc
• The Locations of Short Gamma-ray Bursts as Evidence for Compact Object Binary Progenitors
• A Study of Compact Object Mergers as Short Gamma-ray Burst Progenitors
• A nearby long gamma-ray burst from a merger of compact objects
• Galactic distribution of merging neutron stars and black holes - prospects for short GRB progenitors and LIGO/VIRGO
• Pulsar J0453+1559: A Double Neutron Star System with a Large Mass Asymmetry
• Relativistic Measurements from Timing the Binary Pulsar PSR B1913+16
• On Pulsar Distance Measurements and their Uncertainties
• The observed velocity distribution of young pulsars
• The Spatial Distribution of Coalescing Neutron Star Binaries: Implications for Gamma-Ray Bursts
• Revisiting the radial distribution of pulsars in the Galaxy
• A Short GRB "No-Host'' Problem? Investigating Large Progenitor Offsets for Short GRBs with Optical Afterglows
• A Comprehensive Study of Relativistic Gravity using PSR B1534+12
• PSR J1756-2251: a new relativistic double neutron star system
• The electromagnetic counterparts of compact binary mergers
• Potential Kick Velocity distribution of black hole X-ray binaries and implications for natal kicks
• Formation of Double Neutron Star systems as implied by observations
• PSR J1756$-$2251: a pulsar with a low-mass neutron star companion
• Short GRB Host Galaxies I: Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets
• Simple recipes for compact remnant masses and natal kicks
• On the Progenitor of Binary Neutron Star Merger GW170817
• Multi-telescope timing of PSR J1518+4904
• Short GRBs and Mergers of Compact Objects: Observational Constraints
• Galactic neutron stars I. Space and velocity distributions in the disk and in the halo
• On the nature of the 'hostless' short GRBs
• The Green Bank North Celestial Cap Pulsar Survey III: 45 New Pulsar Timing Solutions
• Double Neutron Star Populations and Formation Channels
• Constraints on Supernova Kicks from the Double Neutron Star System PSR B1913+16
• Pulsar Spin-up, Kinematics, and the Birthrate of Neutron Star Binaries
• The observed velocity distribution of young pulsars II: analysis of complete PSR$\pi$
• Implications for the origin of short gamma-ray bursts from their observed positions around their host galaxies
• A deep survey of short GRB host galaxies over $z\sim 0-2$: implications for offsets, redshifts, and environments
• PSR J1930-1852: a pulsar in the widest known orbit around another neutron star
• Pulsar J1411+2551: A Low Mass New Double Neutron Star System
• Pulsar Kicks and Spin Tilts in the Close Double Neutron Stars PSR J0737-3039, PSR B1534+12 and PSR B1913+16
• Asymmetric mass ratios for bright double neutron-star mergers
• Interpreting Short Gamma Ray Burst Progenitor Kicks and Time Delays Using the Host Galaxy-Dark Matter Halo Connection
• The birth properties of Galactic millisecond radio pulsars
• Combined analysis of neutron star natal kicks using proper motions and parallax measurements for radio pulsars and Be X-ray binaries
• Double Neutron Star Formation: Merger Times, Systemic Velocities, and Travel Distances
• Millisecond Pulsar Ages: Implications of Binary Evolution and a Maximum Spin Limit
• On the Formation and Progenitor of PSR J0737-3039: New Constraints on the Supernova Explosion Forming Pulsar B
• Precise mass measurements for the double neutron star system J1829+2456
• Distribution of compact object mergers around galaxies
• Evidence for mass-dependent peculiar velocities in compact object binaries: Towards better constraints on natal kicks
• An Observationally-Derived Kick Distribution for Neutron Stars in Binary Systems
• No velocity-kicks are required to explain large-distance offsets of Ca-rich supernovae and short-GRBs
• Forward Modeling of Double Neutron Stars: Insights from Highly-Offset Short Gamma-Ray Bursts
• A VLBI distance and transverse velocity for PSR B1913+16
• Close Encounters of Wide Binaries Induced by the Galactic Tide: Implications for Stellar Mergers and Gravitational-Wave Sources
• X-ray emission from the double neutron star binary B1534+12: Powered by the pulsar wind?
• LMXB populations in galaxy outskirts: globular clusters and supernova kicks
• The Galactic neutron star population I - an extragalactic view of the Milky Way and the implications for fast radio bursts
• Evolution of Spin Period and Magnetic Field of the Crab Pulsar: Decay of the Braking Index by the Particle Wind Flow Torque
• Deceleration of kicked objects due to the Galactic potential
• Failed supernovae as a natural explanation for the binary black hole mass distribution

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• The Kick Velocity Distribution of Isolated Neutron Stars
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• Binary neutron star merger offsets from their host galaxies II. Short-duration gamma-ray bursts
• The systemic recoil velocity distribution and the scale height of field millisecond pulsar systems: Implications on neutron star retention fractions in star clusters
• Imagination and Understanding through Astrophysical Imagery
• Forming Double Neutron Stars using Detailed Binary Evolution Models with POSYDON: Comparison to the Galactic Systems