Studies of galaxy evolution using stacking techniques

Jacinta Delhaize

    Research output: ThesisDoctoral Thesis

    218 Downloads (Pure)

    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

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