The clustering of luminous red galaxies around MgII absorbers

被引：27

作者：

Bouché, N

Murphy, MT

Péroux, C

机构：

[1] European So Observ, D-85748 Garching, Germany

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 354卷 / 02期

关键词：

galaxies : evolution; galaxies : haloes; quasars : absorption lines; cosmology : observations;

D O I：

10.1111/j.1365-2966.2004.08348.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the cross-correlation between 212 MgII quasar absorption systems and similar to20000 luminous red galaxies (LRGs) selected from the Sloan Digital Sky Survey Data Release 1 in the redshift range 0 4less than or equal tozless than or equal to0 8. The Mg II systems were selected to have lambdalambda 2796 and 2803 rest-frame equivalent widths greater than or equal to1.0 Angstrom and identifications confirmed by the Fe II lambda2600 or Mg I lambda2852 lines. Over comoving scales 0.05-13 h(-1) Mpc, the Mg II-LRG cross-correlation has an amplitude 0.67+/-0.09 times that of the LRG-LRG auto-correlation. Since LRGs have halo masses greater than 3.5x10(12) M-circle dot for M(R)less than or similar to-21, this relative amplitude implies that the absorber host galaxies have halo masses greater than similar to2-8x10(11) M-circle dot. For 10(13) -M-circle dot LRGs, the absorber host galaxies have halo masses similar to0.5-2.5x10(12) M-circle dot. Our results appear consistent with those of Steidel, Dickinson & Persson (1994) who found that MgII absorbers with W(r)(Mg II)greater than or equal to0.3 are associated with similar to0.7 L-B* galaxies.

引用

页码：L25 / L29

页数：5

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