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The 2dF Galaxy Redshift Survey: luminosity dependence of galaxy clustering

Norberg, Peder and Baugh, Carlton M. and Hawkins, Ed and Maddox, Steve and Peacock, John A. and Cole, Shaun and Frenk, Carlos S. and Bland-Hawthorn, Joss and Bridges, Terry and Cannon, Russell and Colless, Matthew and Collins, Chris and Couch, Warrick and Dalton, Gavin and De Propris, Roberto and Driver, Simon P. and Efstathiou, George and Ellis, Richard S. and Glazebrook, Karl and Jackson, Carole and Lahav, Ofer and Lewis, Ian and Lumsden, Stuart and Madgwick, Darren and Peterson, Bruce A. and Sutherland, Will and Taylor, Keith (2001) The 2dF Galaxy Redshift Survey: luminosity dependence of galaxy clustering. Monthly Notices of the Royal Astronomical Society, 328 (1). pp. 64-70. ISSN 0035-8711. doi:10.1046/j.1365-8711.2001.04839.x.

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We investigate the dependence of the strength of galaxy clustering on intrinsic luminosity using the Anglo-Australian two degree field galaxy redshift survey (2dFGRS). The 2dFGRS is over an order of magnitude larger than previous redshift surveys used to address this issue. We measure the projected two-point correlation function of galaxies in a series of volume-limited samples. The projected correlation function is free from any distortion of the clustering pattern induced by peculiar motions and is well described by a power-law in pair separation over the range 0.1 ≾ r/h Mpc⁻¹ < 10. The clustering of L*(M_(bJ) - 5log₁₀h = -19.7 galaxies in real space is well fit by a correlation length r₀ = 4.9 ± 0.3/h Mpc⁻¹ and power-law slope γ = 1.71 ± 0.06. The clustering amplitude increases slowly with absolute magnitude for galaxies fainter than M*, but rises more strongly at higher luminosities. At low luminosities, our results agree with measurements from the SSRS2 by Benoist et al. However, we find a weaker dependence of clustering strength on luminosity at the highest luminosities. The correlation function amplitude increases by a factor of 4.0 between M_(bJ) - 5log₁₀h = -18 and -22.5, and the most luminous galaxies are 3.0 times more strongly clustered than L* galaxies. The power-law slope of the correlation function shows remarkably little variation for samples spanning a factor of 20 in luminosity. Our measurements are in very good agreement with the predictions of the hierarchical galaxy formation models of Benson et al.

Item Type:Article
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URLURL TypeDescription Paper
Norberg, Peder0000-0002-5875-0440
Baugh, Carlton M.0000-0002-9935-9755
Bland-Hawthorn, Joss0000-0001-7516-4016
Colless, Matthew0000-0001-9552-8075
Ellis, Richard S.0000-0001-7782-7071
Additional Information:© 2001 RAS. Accepted 2001 July 16. Received 2001 July 11; in original form 2001 May 17. The 2dFGRS is being carried out using the two-degree field facility on the 3.9-m Anglo-Australian Telescope (AAT). We thank all those involved in the smooth running and continued success of the 2dF and the AAT. We thank the referee, Dr. L. Guzzo, for producing a speedy and helpful report, and also Andrew Benson for communicating an electronic version of his model predictions. PN was supported by the Swiss National Science Foundation and an ORS award and CMB acknowledges receipt of a Royal Society University Research Fellowship. This work was supported in part by a PPARC rolling grant at Durham.
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)UNSPECIFIED
Cambridge Overseas TrustUNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Subject Keywords:methods: numerical, methods: statistical, galaxies: clusters: general, galaxies: formation, large-scale structure of Universe
Issue or Number:1
Record Number:CaltechAUTHORS:20200601-103014473
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Official Citation:Peder Norberg, Carlton M. Baugh, Ed Hawkins, Steve Maddox, John A. Peacock, Shaun Cole, Carlos S. Frenk, Joss Bland-Hawthorn, Terry Bridges, Russell Cannon, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Roberto De Propris, Simon P. Driver, George Efstathiou, Richard S. Ellis, Karl Glazebrook, Carole Jackson, Ofer Lahav, Ian Lewis, Stuart Lumsden, Darren Madgwick, Bruce A. Peterson, Will Sutherland, Keith Taylor, The 2dF Galaxy Redshift Survey: luminosity dependence of galaxy clustering, Monthly Notices of the Royal Astronomical Society, Volume 328, Issue 1, November 2001, Pages 64–70,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103592
Deposited By: George Porter
Deposited On:01 Jun 2020 19:16
Last Modified:16 Nov 2021 18:23

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