Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244....1f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 1, April 1991, p. 1-7.
Astronomy and Astrophysics
Astrophysics
10
Astronomical Spectroscopy, Kolmogoroff-Smirnoff Test, Lyman Alpha Radiation, Quasars, Galactic Structure, Power Spectra, Red Shift
Scientific paper
In order to search for large-scale inhomogeneity in the one-dimensional spatial distribution of quasar's Ly-alpha absorption lines, a method based on Kolmogorov-Smirnoff statistics of the distribution of absorber pairs has been developed and applied to three dense, pencil-like samples of the Ly-alpha forest. The results show that for the most dense sample, the distribution of the Ly-alpha absorbers deviates from a uniform distribution at a significance level of 2-3 sigma, and that the discrepancy consists in a deficit of absorber pairs with separations in the range of 30-50/h Mpc. It is further found that the deficit of 30-50/h Mpc pairs is due at least partially to a periodic inhomogeneity with wavelengths of about 80/h Mpc.
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