Neutron Star Population Dynamics. I. Millisecond Pulsars

  title={Neutron Star Population Dynamics. I. Millisecond Pulsars},
  author={James M. Cordes and David F Chernoff},
  journal={The Astrophysical Journal},
  pages={971 - 992}
We study the field millisecond pulsar (MSP) population to infer its intrinsic distribution in spin period and luminosity and to determine its spatial distribution within the Galaxy. Our likelihood analysis on data from extant surveys (22 pulsars with periods less than 20 ms) accounts for the following important selection effects: (1) the survey sensitivity as a function of direction, spin period, and sky coverage; (2) interstellar scintillation, which modulates the pulsed flux and causes a net… 

The birth properties of Galactic millisecond radio pulsars

We model the population characteristics of the sample of millisecond pulsars (MSPs) within a distance of 1.5 kpc. We find that for a braking index n = 3, the birth magnetic field distribution of the

Neutron Star Population Dynamics. II. Three-dimensional Space Velocities of Young Pulsars

We use astrometric, distance, and spindown data on pulsars to (1) estimate three-dimensional velocity components, birth distances from the Galactic plane, and ages of individual objects; (2)

Detecting pulsars in the Galactic Centre

Although high-sensitivity surveys have revealed a number of highly dispersed pulsars in the inner Galaxy, none have so far been found in the Galactic centre (GC) region, which we define to be within

The pulsar contribution to the gamma-ray background

We estimate the contribution of Galactic pulsars, both ordinary and millisecond pulsars (MSPs), to the high-energy ( > 100 MeV) γ−ray background. We pay particular attention to the high-latitude part

A new method for estimates of binary pulsar coalescence rates

Estimates of the Galactic coalescence rate (R) of close binaries with two neutron stars (NS–NS) are known to be uncertain by large factors (about two orders of magnitude) mainly due to the small

Bayesian model comparison and analysis of the Galactic disc population of gamma-ray millisecond pulsars

Pulsed emission from almost one hundred millisecond pulsars (MSPs) has been detected in γ-rays by the Fermi Large-Area Telescope. The global properties of this population remain relatively

A new method for estimating binary pulsar coalescence rates

Estimates of the Galactic coalescence rate (R) of close binaries with two neutron stars (NS-NS) are known to be uncertain by large factors (about two orders of magnitude) mainly due to the small


The cumulative luminosity distribution functions (CLFs) of radio millisecond pulsars (MSPs) in globular clusters (GCs) and in the Galactic field at a frequency of 1.4 GHz have been examined. Assuming

The Galactic halo pulsar population

Most population studies of pulsars have hitherto focused on the disc of the Galaxy, the Galactic centre, globular clusters, and nearby galaxies. It is expected that pulsars, by virtue of their natal

The Galactic Millisecond Pulsar Population

  • D. Lorimer
  • Physics
    Proceedings of the International Astronomical Union
  • 2012
Abstract Among the current sample of over 2000 radio pulsars known primarily in the disk of our Galaxy, millisecond pulsars now number almost 200. Due to the phenomenal success of blind surveys of



The magnetic fields, ages, and original spin periods of millisecond pulsars

Accurate determination of the spin-down rates of millisecond pulsars requires consideration of the apparent acceleration of the pulsars due to their high transverse velocities. We show that for

The birthrate and initial spin period of single radio pulsars

A statistical analysis of radio pulsar data is presented. The basic theory behind the analysis is discussed, and all the selection effects of the major pulsar surveys are considered in detail, paying

A Very Luminous Binary Millisecond Pulsar

We report the discovery of a field binary millisecond pulsar, J0218+4232, with a period of 2.3 ms and in a 2.0 day binary orbit with a ≳0.16 M☉ companion. The new pulsar was serendipitously

A new look at pulsar statistics — Birthrate and evidence for injection

We make a statistical analysis of the periodsP and period-derivativesP of pulsars using a model independent theory of pulsar flow in theP-P diagram. Using the available sample ofP andP values, we

Space velocities of radio pulsars from interstellar scintillations

Scintillation observations are used to determine the space velocities of 71 radio pulsars, including most of the 26 objects with proper motions derived from interferometry. The scintillation velocity

A nearby 37.9-ms radio pulsar in a relativistic binary system

WITH very few exceptions1, high Galactic latitudes have not been surveyed with sufficient sensitivity to detect millisecond pulsars. Accordingly we have conducted a preliminary sensitive survey at


More than eighty globular clusters have now been surveyed for pulsars; nearly thirty cluster pulsars have so far been discovered. We review the current status of cluster pulsar searches and their

A new class of radio pulsars

Sufficiently low magnetic field neutron stars which accrete for long times from a surrounding keplerian disk can be spun up to millisecond periods. After accretion ceases, such stars could become

Pulsar flux stability and refractive interstellar scintillation

Accurate flux densities of 25 pulsars at 310, 416, and 750 MHz have been measured for 43 consecutive days with the NRAO 91 m telescope. Pulsars covering a wide range of dispersion measures (DM) were

High birth velocities of radio pulsars

NEUTRON stars are usually born during the supernova explosion of a massive star. Any small asymmetry during the explosion can result in a substantial ‘kick’ velocity1 to the neutron star. Pulsars