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Related Experiment Videos

Magnetars.

C Kouveliotou1

  • 1Universities Space Research Association, ES-84, National Air and Space Administration/Marshall Space Flight Center, Huntsville, AL 35812, USA.

Proceedings of the National Academy of Sciences of the United States of America
|May 13, 1999
PubMed
Summary
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Newly formed neutron stars possess strong magnetic fields (10^14 G), explaining phenomena like soft gamma repeaters and anomalous X-ray pulsars. These findings may also resolve the mystery of missing radio pulsars in young supernova remnants.

Area of Science:

  • Astrophysics
  • High-energy astrophysics
  • Neutron star physics

Background:

  • Recent X-ray observations reveal a significant population of young neutron stars with exceptionally strong magnetic fields, on the order of 10^14 Gauss.
  • These highly magnetized neutron stars are observed as soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs).
  • A discrepancy exists regarding the expected number of radio pulsars in young supernova remnants, suggesting an alternative explanation or population.

Purpose of the Study:

  • To investigate the role of strong magnetic fields in newly born neutron stars.
  • To determine if these magnetars can account for observed soft gamma repeaters and anomalous X-ray pulsars.
  • To explore whether magnetars can resolve the "missing radio pulsar" problem in young supernova remnants.

Main Methods:

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  • Analysis of recent X-ray observational data from young neutron stars.
  • Characterization of the magnetic field strengths and observational properties of SGRs and AXPs.
  • Theoretical modeling to link magnetar properties to pulsar populations in supernova remnants.

Main Results:

  • A substantial fraction of newly born neutron stars exhibit magnetic fields reaching 10^14 Gauss.
  • These strong magnetic fields are consistent with the observed properties of soft gamma repeaters and anomalous X-ray pulsars.
  • The population of magnetars could potentially account for the observed deficit of radio pulsars in young supernova remnants.

Conclusions:

  • Newly born neutron stars commonly possess ultra-strong magnetic fields.
  • Magnetars are a key population explaining SGRs and AXPs.
  • The magnetar hypothesis offers a plausible solution to the missing radio pulsar problem in young supernova remnants.