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

Published online by Cambridge University Press:  12 October 2016

Jon Loveday ,
Leonidas Christodoulou  and
the GAMA team
Jon Loveday
Affiliation:
Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH, UK email: [email protected]
Leonidas Christodoulou
Affiliation:
Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH, UK email: [email protected]
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Abstract

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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.

Keywords

galaxies: kinematics and dynamicsgalaxies: statistics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 328 - 331
Copyright
Copyright © International Astronomical Union 2016 

References

Cole, S., 2011, MNRAS, 416, 739 Google Scholar
Davis, M. & Peebles, P. J. E., 1983, ApJ, 267, 465 Google Scholar
Driver, S. P. et al., 2011, MNRAS, 413, 971 Google Scholar
Juszkiewicz, R., Springel, V., & Durrer, R., 1999, ApJ, 518, L25 Google Scholar
Landy, S. D. & Szalay, A. S., 1993, ApJ, 412, 64 CrossRefGoogle Scholar
Li, C., Jing, Y. P., Kauffmann, G., Borner, G., White, S. D. M., & Cheng, F. Z., 2006, MNRAS, 368, 37 Google Scholar
Loveday, J., 2014, in IAU Symp. 306Google Scholar
Peacock, J. A. & Dodds, S. J., 1993, MNRAS, 267, 13 Google Scholar
Peebles, P. J. E., 1980, The large-scale structure of the universe. Princeton University Press Google Scholar
Saunders, W., Rowan-Robinson, M., & Lawrence, A., 1992, MNRAS, 258, 134 CrossRefGoogle Scholar
Zehavi, I. et al., 2002, ApJ, 571, 172 Google Scholar