The forward and inverse problems in time-distance helioseismology

Jason Jackiewicz, Laurent Gizon, Aaron C. Birch

    Research output: Contribution to journalArticle

    Abstract

    Time-distance helioseismology is a set of tools for peering into the solar interior. In this paper we discuss and provide examples of the steps that go into current high-resolution time-distance helioseismic analyses. These steps include observations (cross covariances, travel times), modeling of the seismic wavefield for a weakly inhomogeneous solar model, and inversion of the travel times. The discussion is framed in the context of studying quiet-Sun flows, although the extension to other solar perturbations is straightforward and analogous. The two-plus-one-dimensional (2+1D) inversion procedure implemented here produces maps of vector flows in the near-surface layers of the photosphere. We examine the flows obtained by compromising, or trading off, between different observation times, spatial resolutions, and noise levels. Also studied is the correlation of the flows at different depths and over different time intervals.

    Original languageEnglish (US)
    Article number012033
    JournalJournal of Physics: Conference Series
    Volume118
    Issue number1
    DOIs
    StatePublished - Jul 1 2008

    Fingerprint

    helioseismology
    travel
    inversions
    solar interior
    photosphere
    surface layers
    sun
    spatial resolution
    intervals
    perturbation
    high resolution

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    The forward and inverse problems in time-distance helioseismology. / Jackiewicz, Jason; Gizon, Laurent; Birch, Aaron C.

    In: Journal of Physics: Conference Series, Vol. 118, No. 1, 012033, 01.07.2008.

    Research output: Contribution to journalArticle

    Jackiewicz, Jason ; Gizon, Laurent ; Birch, Aaron C. / The forward and inverse problems in time-distance helioseismology. In: Journal of Physics: Conference Series. 2008 ; Vol. 118, No. 1.
    @article{40ed90ae327443f7ad9d59ba308c8afc,
    title = "The forward and inverse problems in time-distance helioseismology",
    abstract = "Time-distance helioseismology is a set of tools for peering into the solar interior. In this paper we discuss and provide examples of the steps that go into current high-resolution time-distance helioseismic analyses. These steps include observations (cross covariances, travel times), modeling of the seismic wavefield for a weakly inhomogeneous solar model, and inversion of the travel times. The discussion is framed in the context of studying quiet-Sun flows, although the extension to other solar perturbations is straightforward and analogous. The two-plus-one-dimensional (2+1D) inversion procedure implemented here produces maps of vector flows in the near-surface layers of the photosphere. We examine the flows obtained by compromising, or trading off, between different observation times, spatial resolutions, and noise levels. Also studied is the correlation of the flows at different depths and over different time intervals.",
    author = "Jason Jackiewicz and Laurent Gizon and Birch, {Aaron C.}",
    year = "2008",
    month = "7",
    day = "1",
    doi = "10.1088/1742-6596/118/1/012033",
    language = "English (US)",
    volume = "118",
    journal = "Journal of Physics: Conference Series",
    issn = "1742-6588",
    publisher = "IOP Publishing Ltd.",
    number = "1",

    }

    TY - JOUR

    T1 - The forward and inverse problems in time-distance helioseismology

    AU - Jackiewicz, Jason

    AU - Gizon, Laurent

    AU - Birch, Aaron C.

    PY - 2008/7/1

    Y1 - 2008/7/1

    N2 - Time-distance helioseismology is a set of tools for peering into the solar interior. In this paper we discuss and provide examples of the steps that go into current high-resolution time-distance helioseismic analyses. These steps include observations (cross covariances, travel times), modeling of the seismic wavefield for a weakly inhomogeneous solar model, and inversion of the travel times. The discussion is framed in the context of studying quiet-Sun flows, although the extension to other solar perturbations is straightforward and analogous. The two-plus-one-dimensional (2+1D) inversion procedure implemented here produces maps of vector flows in the near-surface layers of the photosphere. We examine the flows obtained by compromising, or trading off, between different observation times, spatial resolutions, and noise levels. Also studied is the correlation of the flows at different depths and over different time intervals.

    AB - Time-distance helioseismology is a set of tools for peering into the solar interior. In this paper we discuss and provide examples of the steps that go into current high-resolution time-distance helioseismic analyses. These steps include observations (cross covariances, travel times), modeling of the seismic wavefield for a weakly inhomogeneous solar model, and inversion of the travel times. The discussion is framed in the context of studying quiet-Sun flows, although the extension to other solar perturbations is straightforward and analogous. The two-plus-one-dimensional (2+1D) inversion procedure implemented here produces maps of vector flows in the near-surface layers of the photosphere. We examine the flows obtained by compromising, or trading off, between different observation times, spatial resolutions, and noise levels. Also studied is the correlation of the flows at different depths and over different time intervals.

    UR - http://www.scopus.com/inward/record.url?scp=58149467527&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=58149467527&partnerID=8YFLogxK

    U2 - 10.1088/1742-6596/118/1/012033

    DO - 10.1088/1742-6596/118/1/012033

    M3 - Article

    VL - 118

    JO - Journal of Physics: Conference Series

    JF - Journal of Physics: Conference Series

    SN - 1742-6588

    IS - 1

    M1 - 012033

    ER -