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1 results

  • Galaxy and Mass Assembly (GAMA): galaxy pairwise velocity dispersion

  • Jon Loveday, Leonidas Christodoulou, the GAMA team
  • Journal:
    Proceedings of the International Astronomical Union / Volume 11 / Issue S308 / June 2014
    Published online by Cambridge University Press:
    12 October 2016, pp. 328-331
    Print publication:
    June 2014
    • Article
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  • We describe preliminary measurements of the pairwise velocity dispersion (PVD) of galaxies in the Galaxy and Mass Assembly (GAMA) survey as a function of projected separation and galaxy luminosity. Due to the faint magnitude limit (r < 19.8) and highly-complete spectroscopic sampling of the GAMA survey, we are able to measure the PVD to smaller scales and for lower-luminosity galaxies than previous SDSS-based work. We see no strong scale-dependence at most luminosities in the quasi-linear regime. We observe an apparent drop in PVD towards very small scales (below ≈ 0.1h−1 Mpc), but this could in part be due to a restriction of the streaming model employed. At intermediate scales, the PVD is highest (~ 500 km/s) at intermediate luminosities, dropping at both fainter and brighter luminosities.