The Birthrate of Magnetars

Abstract

Magnetars, neutron stars with ultra strong magnetic fields ($B\sim 10^{14}-10^{15}$G), manifest their exotic nature in the form of soft gamma-ray repeaters and anomalous X-ray pulsars. This study estimates the birthrate of magnetars to be $\sim$ 0.22 per century with a galactic population comprising of $\sim$17 objects. A population synthesis was carried out based on the five anomalous X-ray pulsars detected in the ROSAT All-Sky Survey by comparing their number to that of massive OB stars in a well defined volume. Additionally, the group of seven X-ray dim isolated neutron stars detected in the same survey were found to have a birthrate of $\sim$ 2 per century with a galactic population of $\sim$ 22,000 objects.

8 pages, 3 figures, changes to reflect version accepted by Monthly Notices of the Royal Astronomical Society

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Cited by in corpus (31)

• The 511 keV emission from positron annihilation in the Galaxy
• Magnetars: Properties, Origin and Evolution
• On the birthrates of Galactic neutron stars
• Population synthesis studies of isolated neutron stars with magnetic field decay
• Formation Rates and Evolution Histories of Magnetars
• Empirical constraints on the origin of fast radio bursts: volumetric rates and host galaxy demographics as a test of millisecond magnetar connection
• The Science of the Einstein Telescope
• Discovery of a new Soft Gamma Repeater: SGR J0418+5729
• How to switch on and off a Gamma-ray burst through a magnetar
• Origin and evolution of magnetars
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• A magnetar parallax
• The imprint of the crustal magnetic field on the thermal spectra and pulse profiles of isolated neutron stars
• Fast Radio Bursts and the Axion Quark Nugget Dark Matter Model
• Numerical simulations of the Tayler-Spruit dynamo in proto-magnetars
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• Follow-up of isolated neutron star candidates from the eROSITA survey
• Expectations for Fast Radio Bursts in Neutron Star-Massive Star binaries
• Magnetars, Gamma-ray Bursts, and Very Close Binaries
• r-Process Nucleosynthesis and Radioactively Powered Transients from Magnetar Giant Flares
• Quark-Novae, cosmic reionization, and early r-process element production
• Statistical properties of fast radio bursts elucidate their origins: magnetars are favoured over gamma-ray bursts
• Quark-nova remnants IV: Application to radio emitting AXP transients
• Statistical ages and the cooling rate of X-ray dim isolated neutron stars
• Comparing the Space Densities of Millisecond-Spin Magnetars and Fast X-Ray Transients
• Origin of magnetar-scale crustal field in PSR J1852+0040 and "frozen" magnetars
• Fast Radio Bursts from non-resonant Alfvén waves and synchrotron maser emission in the magnetar wind
• Soft gamma repeaters activity in time