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arXiv:astro-ph/0504415 (astro-ph)
[Submitted on 19 Apr 2005 (v1), last revised 25 Apr 2005 (this version, v2)]

Title:Measuring the halo mass of MgII absorbers from their cross-correlation with Luminous Red Galaxies

Authors:Nicolas Bouche (1), M. T. Murphy (2), C. Peroux (3), I. Csabai (4) ((1) MPE, (2) IoA, Cambridge, (3) ESO, (4) Eotvos Lorand Univ., Budapest)
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Abstract: We study the cross-correlation between 716 MgII quasar absorption systems and about 100,000 Luminous Red Galaxies (LRGs) selected from the Sloan Digital Sky Survey Data Release 3 in the redshift range 0.4<z<0.8. The MgII systems were selected to have 2796 & 2803 rest-frame equivalent widths greater than 1.0 Åand identifications confirmed by the FeII 2600 or MgI 2852 lines. Over co-moving scales 0.2--13/h Mpc, the MgII--LRG cross-correlation has an amplitude 0.69+/-0.09 times that of the LRG--LRG auto-correlation. Since LRGs have halo-masses of 10^{13} \msun, this strong cross-correlation implies that the absorber host-galaxies have halo-masses 1--2 times 10^{12} \msun.
Comments: 3 pages, 2 figures, to appear in IAU 199 conf. proc.: "Probing Galaxies through Quasar Absorption Lines," eds. Williams, Shu, Menard; minor changes to match the edited version
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0504415
  (or arXiv:astro-ph/0504415v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0504415
Related DOI: https://doi.org/10.1017/S1743921305002899

Submission history

From: N. Bouche [view email]
[v1] Tue, 19 Apr 2005 14:56:22 UTC (34 KB)
[v2] Mon, 25 Apr 2005 13:37:12 UTC (34 KB)
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