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Binary Pulsar PSR 1913 + 16: Model for Its Origin.

H M Van Horn, S Sofia, M P Savedoff

    Science (New York, N.Y.)
    |May 30, 1975
    PubMed
    Summary
    This summary is machine-generated.

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    This study models the binary pulsar PSR 1913 + 16, suggesting a neutron star pulsar and a helium dwarf companion. Observational data constrain system parameters, including mass and orbital inclination.

    Area of Science:

    • * Astronomy and Astrophysics
    • * Compact Objects
    • * Binary Systems

    Background:

    • * PSR 1913 + 16 is a binary pulsar system with existing observational data.
    • * Evolutionary considerations are used to model the system's components.

    Purpose of the Study:

    • * To develop a well-defined model for the binary pulsar system PSR 1913 + 16.
    • * To determine the nature and properties of the pulsar and its companion star.

    Main Methods:

    • * Analysis of existing observational data for PSR 1913 + 16.
    • * Application of evolutionary models to constrain system parameters.
    • * Magnetic dipole model used to estimate pulsar properties.

    Main Results:

    • * Pulsar identified as a neutron star near the upper mass limit (1.2 solar masses).

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  • * Companion star likely a degenerate helium dwarf with mass near the upper limit (0.25-1.0 solar masses).
  • * Estimated pulsar age ~4x10^4 years, period change rate ~2 ns/day, and magnetic field ~1/3 of Crab pulsar.

    • Conclusions:

    • * The derived model provides a consistent explanation for PSR 1913 + 16.
    • * Future accurate measurements of pulsar period change and searches for supernova remnants will test the model.