期刊
ASTROPHYSICAL JOURNAL
卷 611, 期 2, 页码 725-731出版社
UNIV CHICAGO PRESS
DOI: 10.1086/422353
关键词
cosmology : observations; galaxies : clusters : general; galaxies : evolution; galaxies : formation; galaxies : starburst; large-scale structure of universe
Using accurate positions from very deep radio observations to guide multiobject Keck spectroscopy, we have determined a substantially complete redshift distribution for very luminous distant submillimeter-selected galaxies (SMGs). A sample of 73 redshifts for SMGs in seven fields contains a surprisingly large number of associations'': systems of SMGs with Mpc-scale separations and redshifts within 1200 km s(-1). This sample provides tentative evidence of strong clustering of SMGs at z similar or equal to 2-3 with a correlation length of similar to(6.9 +/- 2.1) h(-1) Mpc, using a simple pair-counting approach that is appropriate to the small, sparse SMG samples. This is somewhat greater than the well-determined correlation lengths for both z similar or equal to 3 optical-UV color-selected Lyman break galaxies (LBGs) and z similar or equal to 2 QSOs. This could indicate that SMGs trace the densest large-scale structures in the high-redshift universe and that they may either be evolutionarily distinct from LBGs and QSOs or subject to a more complex astrophysical bias.
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