The Galactic magnetic field and ultrahigh-energy cosmic ray deflections

Glennys R. Farrar

    Research output: Contribution to journalArticle

    Abstract

    Our understanding of the Galactic magnetic field (GMF) has increased considerably in recent years, while at the same time remaining far from adequate. By way of illustration, the Jansson and Farrar (2012) (JF12) GMF model is described, emphasizing how it is constrained and which features are robust or likely to change, as modeling and constraining data improve. The most urgent requirements for the next phase of modeling are a more realistic model for the relativistic electron distribution (in order to reduce the systematic error associated with interpreting synchrotron data) and a better theoretical understanding of the origin of the large-scale coherent field (in order to develop a better phenomenological parameterization of the field). Even in its current stage of development, the JF12 model allows some important conclusions about UHECR deflections in the GMF to be formulated.

    Original languageEnglish (US)
    Pages (from-to)339-348
    Number of pages10
    JournalComptes Rendus Physique
    Volume15
    Issue number4
    DOIs
    StatePublished - 2014

    Fingerprint

    interstellar magnetic fields
    deflection
    cosmic rays
    electron distribution
    parameterization
    systematic errors
    energy
    synchrotrons
    requirements

    Keywords

    • Galactic magnetic field
    • Magnetic deflections
    • UHECR

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    The Galactic magnetic field and ultrahigh-energy cosmic ray deflections. / Farrar, Glennys R.

    In: Comptes Rendus Physique, Vol. 15, No. 4, 2014, p. 339-348.

    Research output: Contribution to journalArticle

    Farrar, Glennys R. / The Galactic magnetic field and ultrahigh-energy cosmic ray deflections. In: Comptes Rendus Physique. 2014 ; Vol. 15, No. 4. pp. 339-348.
    @article{e58dc91a1b064ee8968a3b450ebf6423,
    title = "The Galactic magnetic field and ultrahigh-energy cosmic ray deflections",
    abstract = "Our understanding of the Galactic magnetic field (GMF) has increased considerably in recent years, while at the same time remaining far from adequate. By way of illustration, the Jansson and Farrar (2012) (JF12) GMF model is described, emphasizing how it is constrained and which features are robust or likely to change, as modeling and constraining data improve. The most urgent requirements for the next phase of modeling are a more realistic model for the relativistic electron distribution (in order to reduce the systematic error associated with interpreting synchrotron data) and a better theoretical understanding of the origin of the large-scale coherent field (in order to develop a better phenomenological parameterization of the field). Even in its current stage of development, the JF12 model allows some important conclusions about UHECR deflections in the GMF to be formulated.",
    keywords = "Galactic magnetic field, Magnetic deflections, UHECR",
    author = "Farrar, {Glennys R.}",
    year = "2014",
    doi = "10.1016/j.crhy.2014.04.002",
    language = "English (US)",
    volume = "15",
    pages = "339--348",
    journal = "Comptes Rendus Physique",
    issn = "1631-0705",
    publisher = "Elsevier Masson",
    number = "4",

    }

    TY - JOUR

    T1 - The Galactic magnetic field and ultrahigh-energy cosmic ray deflections

    AU - Farrar, Glennys R.

    PY - 2014

    Y1 - 2014

    N2 - Our understanding of the Galactic magnetic field (GMF) has increased considerably in recent years, while at the same time remaining far from adequate. By way of illustration, the Jansson and Farrar (2012) (JF12) GMF model is described, emphasizing how it is constrained and which features are robust or likely to change, as modeling and constraining data improve. The most urgent requirements for the next phase of modeling are a more realistic model for the relativistic electron distribution (in order to reduce the systematic error associated with interpreting synchrotron data) and a better theoretical understanding of the origin of the large-scale coherent field (in order to develop a better phenomenological parameterization of the field). Even in its current stage of development, the JF12 model allows some important conclusions about UHECR deflections in the GMF to be formulated.

    AB - Our understanding of the Galactic magnetic field (GMF) has increased considerably in recent years, while at the same time remaining far from adequate. By way of illustration, the Jansson and Farrar (2012) (JF12) GMF model is described, emphasizing how it is constrained and which features are robust or likely to change, as modeling and constraining data improve. The most urgent requirements for the next phase of modeling are a more realistic model for the relativistic electron distribution (in order to reduce the systematic error associated with interpreting synchrotron data) and a better theoretical understanding of the origin of the large-scale coherent field (in order to develop a better phenomenological parameterization of the field). Even in its current stage of development, the JF12 model allows some important conclusions about UHECR deflections in the GMF to be formulated.

    KW - Galactic magnetic field

    KW - Magnetic deflections

    KW - UHECR

    UR - http://www.scopus.com/inward/record.url?scp=84901746137&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84901746137&partnerID=8YFLogxK

    U2 - 10.1016/j.crhy.2014.04.002

    DO - 10.1016/j.crhy.2014.04.002

    M3 - Article

    VL - 15

    SP - 339

    EP - 348

    JO - Comptes Rendus Physique

    JF - Comptes Rendus Physique

    SN - 1631-0705

    IS - 4

    ER -