THE PROPERTIES OF THE PROGENITOR SUPERNOVA, PULSAR WIND, AND NEUTRON STAR INSIDE PWN G54.1+0.3

Joseph (Yosi) Gelfand, Patrick O. Slane, Tea Temim

    Research output: Contribution to journalArticle

    Abstract

    The evolution of a pulsar wind nebula (PWN) inside a supernova remnant (SNR) is sensitive to the properties of the central neutron star, pulsar wind, progenitor supernova, and interstellar medium. These properties are both difficult to measure directly and critical for understanding the formation of neutron stars and their interaction with the surrounding medium. In this paper, we determine these properties for PWN G54.1+0.3 by fitting its observed properties with a model for the dynamical and radiative evolution of a PWN inside an SNR. Our modeling suggests that the progenitor of G54.1+0.3 was an isolated ∼15-20M⊙ star which exploded inside a massive star cluster, creating a neutron star initially spinning with a period of P0 ∼ 30-80 ms. We also find that ≳99.9% of the pulsar's rotational energy is injected into the PWN as relativistic electrons and positrons whose energy spectrum is well characterized by a broken power law. Finally, we propose future observations which can both test the validity of this model and better determine the properties of this source - in particular, its distance and the initial spin period of the central pulsar.

    Original languageEnglish (US)
    Article number30
    JournalAstrophysical Journal
    Volume807
    Issue number1
    DOIs
    StatePublished - Jul 1 2015

    Fingerprint

    nebulae
    pulsars
    neutron stars
    supernovae
    supernova remnants
    energy
    power law
    star clusters
    massive stars
    metal spinning
    electron
    positrons
    energy spectra
    stars
    modeling
    electrons
    interactions

    Keywords

    • ISM: individual objects (PWN G54.1+0.3)
    • ISM: supernova remnants
    • pulsars: individual (PSR J1930+1852)
    • X-rays: individual (PWN G54.1+0.3)

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    THE PROPERTIES OF THE PROGENITOR SUPERNOVA, PULSAR WIND, AND NEUTRON STAR INSIDE PWN G54.1+0.3. / Gelfand, Joseph (Yosi); Slane, Patrick O.; Temim, Tea.

    In: Astrophysical Journal, Vol. 807, No. 1, 30, 01.07.2015.

    Research output: Contribution to journalArticle

    Gelfand, Joseph (Yosi) ; Slane, Patrick O. ; Temim, Tea. / THE PROPERTIES OF THE PROGENITOR SUPERNOVA, PULSAR WIND, AND NEUTRON STAR INSIDE PWN G54.1+0.3. In: Astrophysical Journal. 2015 ; Vol. 807, No. 1.
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    abstract = "The evolution of a pulsar wind nebula (PWN) inside a supernova remnant (SNR) is sensitive to the properties of the central neutron star, pulsar wind, progenitor supernova, and interstellar medium. These properties are both difficult to measure directly and critical for understanding the formation of neutron stars and their interaction with the surrounding medium. In this paper, we determine these properties for PWN G54.1+0.3 by fitting its observed properties with a model for the dynamical and radiative evolution of a PWN inside an SNR. Our modeling suggests that the progenitor of G54.1+0.3 was an isolated ∼15-20M⊙ star which exploded inside a massive star cluster, creating a neutron star initially spinning with a period of P0 ∼ 30-80 ms. We also find that ≳99.9{\%} of the pulsar's rotational energy is injected into the PWN as relativistic electrons and positrons whose energy spectrum is well characterized by a broken power law. Finally, we propose future observations which can both test the validity of this model and better determine the properties of this source - in particular, its distance and the initial spin period of the central pulsar.",
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