The 6dFGS peculiar velocity field

Christopher M Springob, Christine Magoulas, Matthew Colless, D Heath Jones, Lachlan Campbell, John Lucey, Jeremy Mould, Pirin Erdogdu

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The 6dF Galaxy Survey (6dFGS) is an all-southern-sky galaxy survey, including 125,000 redshifts and a Fundamental Plane (FP) subsample of 10,000 peculiar velocities. This makes 6dFGS the largest peculiar-velocity sample to date. We have fitted the FP with a tri-variate Gaussian model using a maximum-likelihood approach, and derive the Bayesian probability distribution of the peculiar velocity for each of the 10,000 galaxies. We fit models of the velocity field, including comparisons to the field predicted from the redshift-survey density field, to derive the values of the redshift-space distortion parameter β, the bulk flow and the residual bulk flow in excess of that predicted from the density field. We compare these results to those derived by other authors and discuss the cosmological implications.
    Original languageEnglish
    Title of host publicationAdvancing the Physics of Cosmic Distances
    EditorsRichard de Grijs
    Place of PublicationCambridge
    PublisherCambridge University Press
    Pages269-273pp
    DOIs
    Publication statusPublished - 2013
    EventAdvancing the Physics of Cosmic Distances - Beijing, China, China
    Duration: 1 Jan 2013 → …
    http://journals.cambridge.org/action/displayIssue?jid=IAU&volumeId=8&seriesId=0&issueId=S289

    Conference

    ConferenceAdvancing the Physics of Cosmic Distances
    Country/TerritoryChina
    Period1/01/13 → …
    Other27-31 Aug 2012
    Internet address

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