CLUSTERING PROPERTIES OF THE LY$α$ CLOUDS

Details CLUSTERING PROPERTIES OF THE LY$α$ CLOUDS CLUSTERING PROPERTIES OF THE LY$α$ CLOUDS

1995-05-29

arxiv.org/abs/astro-ph/9505131v1

Astronomy and Astrophysics

Astrophysics

4 pages uuencoded compressed postscript, to appear in the proceedings of the XXXth MORIOND meeting: "Clustering in the Univers

Scientific paper

The spectra of the QSOs PKS2126-158 ($z_{em}=3.27$) and Q0055-269 ($z_{em}=3.66$) have been observed at high resolution ($2.2 - 2.7 \times 10^4$). Significant clustering, with $\xi \simeq 1$ at $\Delta v=100$ km s$^{-1}$, is detected in both cases for lines with $\log N_{HI} \geq 13.8$. A similar result is obtained analysing the data available in the literature for Q0014+81. An anticlustering signal is also detected on scales $\Delta v \sim 600$ km s$^{-1}$. Two voids of size $\sim 2000$ km s$^{-1}$ are found in the spectrum of Q0055-269 with a probability of $2\times 10^{-4}$.

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