Propagation and dynamics of relativistic jets

Akira Mizuta, Shoichi Yamada, Hideaki Takabe

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    We investigate the dynamics and morphology of jets propagating into the interstellar medium using twodimensional relativistic hydrodynamic simulations. The calculations are performed assuming axisymmetric geometry and follow jet propagation over a long distance. The jets are assumed to be "light," with the density ratio between the beam to the ambient gas much less than unity. We examine the mechanism for the appearance of vortices at the head of jets in the hot spot. Such vortices are known as a trigger of a deceleration phase, which appears after a short phase in which the jet propagation follows the results from one-dimensional analysis. We find that an oblique shock at the boundary rim near the end of the beam strongly affects the flow structure in and around the hot spot. Weakly shocked gas passes through this oblique shock and becomes a trigger for the generation of vortices. We also find the parameter dependence of these effects for the propagation and dynamics of the jets. The jet with slower propagation velocity is weakly pinched, has large vortices, and shows very complex structure at the head of the jets and extended synchrotron emissivity.

    Original languageEnglish
    Pages (from-to)804-818
    Number of pages15
    JournalAstrophysical Journal
    Volume606
    Issue number2 I
    DOIs
    Publication statusPublished - 2004 May 10

    Fingerprint

    propagation
    vortex
    vortices
    actuators
    shock
    propagation velocity
    dimensional analysis
    flow structure
    deceleration
    emissivity
    rims
    gases
    gas
    unity
    synchrotrons
    hydrodynamics
    geometry
    simulation

    Keywords

    • Galaxies: jets
    • Hydrodynamics
    • Methods: numerical
    • Relativity
    • Shock waves

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Propagation and dynamics of relativistic jets. / Mizuta, Akira; Yamada, Shoichi; Takabe, Hideaki.

    In: Astrophysical Journal, Vol. 606, No. 2 I, 10.05.2004, p. 804-818.

    Research output: Contribution to journalArticle

    Mizuta, Akira ; Yamada, Shoichi ; Takabe, Hideaki. / Propagation and dynamics of relativistic jets. In: Astrophysical Journal. 2004 ; Vol. 606, No. 2 I. pp. 804-818.
    @article{75d9f117a70e47ada8ba92621daf7466,
    title = "Propagation and dynamics of relativistic jets",
    abstract = "We investigate the dynamics and morphology of jets propagating into the interstellar medium using twodimensional relativistic hydrodynamic simulations. The calculations are performed assuming axisymmetric geometry and follow jet propagation over a long distance. The jets are assumed to be {"}light,{"} with the density ratio between the beam to the ambient gas much less than unity. We examine the mechanism for the appearance of vortices at the head of jets in the hot spot. Such vortices are known as a trigger of a deceleration phase, which appears after a short phase in which the jet propagation follows the results from one-dimensional analysis. We find that an oblique shock at the boundary rim near the end of the beam strongly affects the flow structure in and around the hot spot. Weakly shocked gas passes through this oblique shock and becomes a trigger for the generation of vortices. We also find the parameter dependence of these effects for the propagation and dynamics of the jets. The jet with slower propagation velocity is weakly pinched, has large vortices, and shows very complex structure at the head of the jets and extended synchrotron emissivity.",
    keywords = "Galaxies: jets, Hydrodynamics, Methods: numerical, Relativity, Shock waves",
    author = "Akira Mizuta and Shoichi Yamada and Hideaki Takabe",
    year = "2004",
    month = "5",
    day = "10",
    doi = "10.1086/382779",
    language = "English",
    volume = "606",
    pages = "804--818",
    journal = "Astrophysical Journal",
    issn = "0004-637X",
    publisher = "IOP Publishing Ltd.",
    number = "2 I",

    }

    TY - JOUR

    T1 - Propagation and dynamics of relativistic jets

    AU - Mizuta, Akira

    AU - Yamada, Shoichi

    AU - Takabe, Hideaki

    PY - 2004/5/10

    Y1 - 2004/5/10

    N2 - We investigate the dynamics and morphology of jets propagating into the interstellar medium using twodimensional relativistic hydrodynamic simulations. The calculations are performed assuming axisymmetric geometry and follow jet propagation over a long distance. The jets are assumed to be "light," with the density ratio between the beam to the ambient gas much less than unity. We examine the mechanism for the appearance of vortices at the head of jets in the hot spot. Such vortices are known as a trigger of a deceleration phase, which appears after a short phase in which the jet propagation follows the results from one-dimensional analysis. We find that an oblique shock at the boundary rim near the end of the beam strongly affects the flow structure in and around the hot spot. Weakly shocked gas passes through this oblique shock and becomes a trigger for the generation of vortices. We also find the parameter dependence of these effects for the propagation and dynamics of the jets. The jet with slower propagation velocity is weakly pinched, has large vortices, and shows very complex structure at the head of the jets and extended synchrotron emissivity.

    AB - We investigate the dynamics and morphology of jets propagating into the interstellar medium using twodimensional relativistic hydrodynamic simulations. The calculations are performed assuming axisymmetric geometry and follow jet propagation over a long distance. The jets are assumed to be "light," with the density ratio between the beam to the ambient gas much less than unity. We examine the mechanism for the appearance of vortices at the head of jets in the hot spot. Such vortices are known as a trigger of a deceleration phase, which appears after a short phase in which the jet propagation follows the results from one-dimensional analysis. We find that an oblique shock at the boundary rim near the end of the beam strongly affects the flow structure in and around the hot spot. Weakly shocked gas passes through this oblique shock and becomes a trigger for the generation of vortices. We also find the parameter dependence of these effects for the propagation and dynamics of the jets. The jet with slower propagation velocity is weakly pinched, has large vortices, and shows very complex structure at the head of the jets and extended synchrotron emissivity.

    KW - Galaxies: jets

    KW - Hydrodynamics

    KW - Methods: numerical

    KW - Relativity

    KW - Shock waves

    UR - http://www.scopus.com/inward/record.url?scp=2442526523&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=2442526523&partnerID=8YFLogxK

    U2 - 10.1086/382779

    DO - 10.1086/382779

    M3 - Article

    AN - SCOPUS:2442526523

    VL - 606

    SP - 804

    EP - 818

    JO - Astrophysical Journal

    JF - Astrophysical Journal

    SN - 0004-637X

    IS - 2 I

    ER -