Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Galaxy and Mass Assembly (GAMA): Small-scale anisotropic galaxy clustering and the pairwise velocity dispersion of galaxies

Loveday, J, Christodoulou, L, Norberg, P, Peacock, JA, Baldry, IK, Bland-Hawthorn, J, Brown, MJI, Colless, M, Driver, SP, Holwerda, BW, Hopkins, AM, Kafle, PR, Liske, J, Lopez-Sanchez, AR and Taylor, EN Galaxy and Mass Assembly (GAMA): Small-scale anisotropic galaxy clustering and the pairwise velocity dispersion of galaxies. Monthly Notices of the Royal Astronomical Society, stx297. ISSN 0035-8711 (Accepted)

[img]
Preview
Text
1711.05636v1.pdf - Accepted Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview

Abstract

The galaxy pairwise velocity dispersion (PVD) can provide important tests of non-standard gravity and galaxy formation models. We describe measurements of the 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 reliably measure the PVD to smaller scales ($r_\bot = 0.01$ Mpc/h) than previous work. The measured PVD at projected separations $r_\bot <~ 1$ Mpc/h increases near-monotonically with increasing luminosity from $\sigma \approx 200$ km/s at $M_r = -17$ mag to $\sigma \approx 600$ km/s at $M_r \approx -22$ mag. Analysis of the Gonzalez-Perez (2014) GALFORM semi-analytic model yields no such trend of PVD with luminosity: the model over-predicts the PVD for faint galaxies. This is most likely a result of the model placing too many low-luminosity galaxies in massive halos.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of The Royal Astronomical Society following peer review. The version of record: J. Loveday, L. Christodoulou, P. Norberg, J.A. Peacock, I.K. Baldry, J. Bland-Hawthorn, M.J.I. Brown, M. Colless, S.P. Driver, B.W. Holwerda, A.M. Hopkins, P.R. Kafle, J. Liske, A.R. Lopez-Sanchez, E.N. Taylor; Galaxy and Mass Assembly (GAMA): Small–scale anisotropic galaxy clustering and the pairwise velocity dispersion of galaxies, Monthly Notices of the Royal Astronomical Society, stx2971, is available online at: http://dx.doi.org/10.1093/mnras/stx2971.
Uncontrolled Keywords: astro-ph.CO; astro-ph.CO
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 12 Dec 2017 10:00
Last Modified: 12 Dec 2017 10:00
DOI or Identification number: 10.1093/mnras/stx2971
URI: http://researchonline.ljmu.ac.uk/id/eprint/7698

Actions (login required)

View Item View Item