Space and Velocity Distributions of Galactic Isolated Old Neutron Stars

Space and Velocity Distributions of Galactic Isolated Old Neutron Stars

I present the results of Monte Carlo orbital simulations of Galactic Neutron Stars (NSs). The simulations take into account the up-to-date observed NS space and velocity distributions at birth, and account for their formation rate. I simulate two populations of NSs. NSs in the first population were born in the Galactic disk at a constant rate, in the past 12 Gyr. Those in the second population ...

Magnetically Accreting Isolated Old Neutron Stars

Previous work on the emission from isolated old neutron stars (IONSs) accreting from the interstellar medium (ISM) has focused on gravitational captureÈi.e., Bondi accretion. We propose a new class of sources that accrete via magnetic interaction with the ISM. While for the Bondi mechanism the accretion rate decreases with increasing neutron star velocity, in magnetic accretors (MAGACs) M0 Bond...

Old Isolated Accreting Neutron Stars: The Diffuse X–ray Emission From The Galactic Center

The contribution of weakly–magnetized (B ∼ 10 G) neutron stars accreting the interstellar medium to the diffuse X–ray emission observed in the Galactic Center is investigated. It is shown that, under rather conservative assumptions about the neutron stars and gas distributions, the accretion luminosity can account for a sizable fraction, possibly most, of the detected X–ray flux in the 2.5–7 ke...

THE CENTURY OF SPACE SCIENCE Pulsars and Isolated Neutron Stars

Period Distribution of Old Accreting Isolated Neutron Stars

In this paper we present calculations of period distribution for old accreting isolated neutron stars (INSs). After few billion years of evolution low velocity INSs come to the stage of accretion. At this stage INS's period evolution is governed by magnetic braking and angular momentum accreted. Since the interstellar medium is turbulized accreted momentum can either accelerate or decelerate sp...