CLUSTERING PROPERTIES OF THE LYα CLOUDS
Cristiani, S. · D'Odorico, S. · D'Odorico, V. · Fontana, A. · Giallongo, E. · Savaglio, S.
Original · EN
The spectra of the QSOs PKS2126-158 (zem=3.27) and Q0055-269 (zem=3.66) have been observed at high resolution (2.2 - 2.7 × 10⁴). Significant clustering, with ξ≃ 1 at Δv=100 km s⁻¹, is detected in both cases for lines with NHI ≥ 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 Δv 600 km s⁻¹. Two voids of size 2000 km s⁻¹ are found in the spectrum of Q0055-269 with a probability of 2× 10⁻⁴.
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