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The Distance to the Soft Gamma Repeater SGR 1627-41.

Corbel, Chapuis, Dame

    The Astrophysical Journal
    |October 27, 1999
    PubMed
    Summary
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    Astronomers observed the soft gamma repeater SGR 1627-41, linking it to supernova remnant G337.0-0.1. This suggests SGR 1627-41 is a high-velocity neutron star ejected from the remnant.

    Area of Science:

    • * Astronomy and Astrophysics
    • * High-Energy Astrophysics
    • * Galactic Structure

    Background:

    • * Soft gamma repeaters (SGRs) are highly magnetized neutron stars exhibiting powerful bursts.
    • * Supernova remnants (SNRs) mark the aftermath of stellar explosions.
    • * The association between SGRs, SNRs, and massive molecular clouds is an active area of research.

    Purpose of the Study:

    • * To investigate the environment of the soft gamma repeater SGR 1627-41.
    • * To determine the potential association between SGR 1627-41 and supernova remnant G337.0-0.1.
    • * To explore the relationship between SGRs, SNRs, and massive molecular clouds.

    Main Methods:

    • * Millimeter wave observations were conducted towards the line of sight of SGR 1627-41.

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  • * Analysis of molecular clouds along the line of sight to identify potential interactions.
  • * Examination of X-ray data to assess extinction and confirm associations.

    • Main Results:

    • * Eight molecular clouds were identified along the line of sight to SGR 1627-41.
    • * Supernova remnant G337.0-0.1 is likely interacting with a massive giant molecular cloud (GMC) 11 kpc distant.
    • * High extinction to SGR 1627-41's X-ray counterpart supports its association with SNR G337.0-0.1.

    Conclusions:

    • * SGR 1627-41 and SNR G337.0-0.1 are likely associated and located on the near side of a massive GMC.
    • * This finding marks the second SGR discovered near an exceptionally massive GMC.
    • * SGR 1627-41 is proposed to be a neutron star with high transverse velocity, ejected from the young SNR G337.0-0.1.