The Two Point Correlation of 2dF Quasars and 2SLAQ Galaxies

Details The Two Point Correlation of 2dF Quasars and 2SLAQ Galaxies The Two Point Correlation of 2dF Quasars and 2SLAQ Galaxies

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4526n&link_type=abstract

American Astronomical Society, AAS Meeting #211, #45.26; Bulletin of the American Astronomical Society, Vol. 39, p.800

Astronomy and Astrophysics

Astronomy

Scientific paper

Hierarchical models of galaxy formation suggest that quasars are formed in dark matter halos through galaxy mergers. We test these models by measuring the quasar-galaxy projected cross correlation function of 420 quasars from the 2dF survey with ?000; Luminous Red Galaxies (LRGs) from the 2dF-SDSS LRG and QSO (2SLAQ) survey.
We find that on scales of 0.4-10h-1 Mpc, the QG correlation function has a correlation length of r_0=5.69 ± 0.20h-1 Mpc and γ =1.51 ± 0.08. This length is 2σ lower than our measured GG correlation for 2SLAQ galaxies suggesting that for z=0.2-0.8, quasars are less highly clustered than LRGs. This result may present problems for these hierarchical models.

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