Probing 3-D matter distribution at z~2 with QSO multiple lines of sight

Details Probing 3-D matter distribution at z~2 with QSO multiple lines of sight Probing 3-D matter distribution at z~2 with QSO multiple lines of sight

2005-06-09

arxiv.org/abs/astro-ph/0506195v1

Astronomy and Astrophysics

Astrophysics

Poster paper presented at the IAU Colloquium #199 on "Probing Galaxies through Quasar Absorption Lines" held in Shanghai, Chin

Scientific paper

10.1017/S1743921305002929

We investigate the 3-D matter distribution at z~2 with high resolution (R ~ 40000) spectra of QSO pairs and groups obtained with the UVES spectrograph at ESO VLT. Our sample is unique for the number density of objects and the variety of separations, between 0.5 and 7 proper Mpc. We compute the real space cross-correlation function of the Lyman-alpha forest transmitted fluxes. There is a significant clustering signal up to ~2 proper Mpc, which is still present when absorption lines with high column density (log N > 13.8) are excluded.

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