Studies of galaxy evolution using stacking techniques

Jacinta Delhaize

    Research output: ThesisDoctoral Thesis

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    Abstract

    [Truncated abstract] Large samples of galaxies studied over a range of redshifts are fundamental to understanding the various components and processes involved in galaxy evolution. However, large multiwavelength galaxy surveys are
    often restricted by the sensitivity or field-of-view of currently available telescopes.
    This thesis demonstrates how the innovative ‘stacking’ analysis technique can be used to overcome observational limits to allow studies of galaxy evolution over larger volumes than possible with direct detection methods.

    Stacking is the process of combining the weak signals of many individual galaxies so as to increase the signal-to-noise ratio and allow a strong statistical detection. This thesis explores, develops and implements this technique to investigate (i) how the neutral atomic hydrogen gas (Hi) component of galaxies varies with cosmic time, and (ii) how radio-loud active galaxies influence the interstellar medium and star formation of their host galaxies.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Publication statusUnpublished - 2014

    Fingerprint

    galaxies
    theses
    active galaxies
    radio galaxies
    field of view
    star formation
    signal to noise ratios
    telescopes
    sensitivity
    hydrogen
    gases

    Cite this

    @phdthesis{1adddd1e1ba7433cb53c1b6a1b77e28c,
    title = "Studies of galaxy evolution using stacking techniques",
    abstract = "[Truncated abstract] Large samples of galaxies studied over a range of redshifts are fundamental to understanding the various components and processes involved in galaxy evolution. However, large multiwavelength galaxy surveys are often restricted by the sensitivity or field-of-view of currently available telescopes. This thesis demonstrates how the innovative ‘stacking’ analysis technique can be used to overcome observational limits to allow studies of galaxy evolution over larger volumes than possible with direct detection methods. Stacking is the process of combining the weak signals of many individual galaxies so as to increase the signal-to-noise ratio and allow a strong statistical detection. This thesis explores, develops and implements this technique to investigate (i) how the neutral atomic hydrogen gas (Hi) component of galaxies varies with cosmic time, and (ii) how radio-loud active galaxies influence the interstellar medium and star formation of their host galaxies.",
    keywords = "Galaxy evolution, Neutral hydrogen gas, Stacking, Radio astronomy, Star formation rates, Radio galaxies, High redshift, 21cm line",
    author = "Jacinta Delhaize",
    year = "2014",
    language = "English",

    }

    Delhaize, J 2014, 'Studies of galaxy evolution using stacking techniques', Doctor of Philosophy.

    Studies of galaxy evolution using stacking techniques. / Delhaize, Jacinta.

    2014.

    Research output: ThesisDoctoral Thesis

    TY - THES

    T1 - Studies of galaxy evolution using stacking techniques

    AU - Delhaize, Jacinta

    PY - 2014

    Y1 - 2014

    N2 - [Truncated abstract] Large samples of galaxies studied over a range of redshifts are fundamental to understanding the various components and processes involved in galaxy evolution. However, large multiwavelength galaxy surveys are often restricted by the sensitivity or field-of-view of currently available telescopes. This thesis demonstrates how the innovative ‘stacking’ analysis technique can be used to overcome observational limits to allow studies of galaxy evolution over larger volumes than possible with direct detection methods. Stacking is the process of combining the weak signals of many individual galaxies so as to increase the signal-to-noise ratio and allow a strong statistical detection. This thesis explores, develops and implements this technique to investigate (i) how the neutral atomic hydrogen gas (Hi) component of galaxies varies with cosmic time, and (ii) how radio-loud active galaxies influence the interstellar medium and star formation of their host galaxies.

    AB - [Truncated abstract] Large samples of galaxies studied over a range of redshifts are fundamental to understanding the various components and processes involved in galaxy evolution. However, large multiwavelength galaxy surveys are often restricted by the sensitivity or field-of-view of currently available telescopes. This thesis demonstrates how the innovative ‘stacking’ analysis technique can be used to overcome observational limits to allow studies of galaxy evolution over larger volumes than possible with direct detection methods. Stacking is the process of combining the weak signals of many individual galaxies so as to increase the signal-to-noise ratio and allow a strong statistical detection. This thesis explores, develops and implements this technique to investigate (i) how the neutral atomic hydrogen gas (Hi) component of galaxies varies with cosmic time, and (ii) how radio-loud active galaxies influence the interstellar medium and star formation of their host galaxies.

    KW - Galaxy evolution

    KW - Neutral hydrogen gas

    KW - Stacking

    KW - Radio astronomy

    KW - Star formation rates

    KW - Radio galaxies

    KW - High redshift

    KW - 21cm line

    M3 - Doctoral Thesis

    ER -