Proper Motion of the High-velocity Pulsar in SNR MSH 15-56

Tea Temim, Patrick Slane, Paul P. Plucinsky, Joseph (Yosi) Gelfand, Daniel Castro, Christopher Kolb

    Research output: Contribution to journalArticle

    Abstract

    We present a measurement of the proper motion of the presumed pulsar in the evolved composite supernova remnant (SNR) MSH 15-56 whose pulsar wind nebula (PWN) has been disrupted by the supernova (SN) reverse shock. Using Chandra X-ray observations acquired over a baseline of 15 years, we measure a pulsar velocity of and a direction of motion of 14° ± 22° west of south. We use this measurement to constrain a hydrodynamical (HD) model for the evolution of this system, and find that its morphology is well-described by an SNR expanding in an ambient density gradient that increases from east to west. The effect of the density gradient and the pulsar's motion is an asymmetric interaction between the SN reverse shock and the PWN that displaces the bulk of the PWN material away from the pulsar toward the northeast. The simulation is consistent with an SNR age of 11,000 years, an SN ejecta mass of 10 M, and an average surrounding density of 0.4 cm-3, but a combination of a higher SN ejecta mass and ambient density can produce a similar SNR morphology at a later age.

    Original languageEnglish (US)
    Article number128
    JournalAstrophysical Journal
    Volume851
    Issue number2
    DOIs
    StatePublished - Dec 20 2017

    Fingerprint

    proper motion
    supernova remnants
    pulsars
    supernovae
    ejecta
    nebulae
    shock
    gradients
    simulation
    composite materials
    x rays

    Keywords

    • hydrodynamics
    • ISM: supernova remnants
    • proper motions
    • pulsars: general
    • X-rays: individual (MSH 15-56)

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Temim, T., Slane, P., Plucinsky, P. P., Gelfand, J. Y., Castro, D., & Kolb, C. (2017). Proper Motion of the High-velocity Pulsar in SNR MSH 15-56. Astrophysical Journal, 851(2), [128]. https://doi.org/10.3847/1538-4357/aa9d41

    Proper Motion of the High-velocity Pulsar in SNR MSH 15-56. / Temim, Tea; Slane, Patrick; Plucinsky, Paul P.; Gelfand, Joseph (Yosi); Castro, Daniel; Kolb, Christopher.

    In: Astrophysical Journal, Vol. 851, No. 2, 128, 20.12.2017.

    Research output: Contribution to journalArticle

    Temim, T, Slane, P, Plucinsky, PP, Gelfand, JY, Castro, D & Kolb, C 2017, 'Proper Motion of the High-velocity Pulsar in SNR MSH 15-56', Astrophysical Journal, vol. 851, no. 2, 128. https://doi.org/10.3847/1538-4357/aa9d41
    Temim T, Slane P, Plucinsky PP, Gelfand JY, Castro D, Kolb C. Proper Motion of the High-velocity Pulsar in SNR MSH 15-56. Astrophysical Journal. 2017 Dec 20;851(2). 128. https://doi.org/10.3847/1538-4357/aa9d41
    Temim, Tea ; Slane, Patrick ; Plucinsky, Paul P. ; Gelfand, Joseph (Yosi) ; Castro, Daniel ; Kolb, Christopher. / Proper Motion of the High-velocity Pulsar in SNR MSH 15-56. In: Astrophysical Journal. 2017 ; Vol. 851, No. 2.
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