Open AccessRedshift distribution of Ly α lines and metal systems
Author(s) -
Demiański M.,
Doroshkevich A. G.,
Turchaninov V.
Publication year - 2000
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2000.03861.x
Subject(s) - physics , redshift , astrophysics , galaxy , dark matter , astronomy , baryon , population , demography , sociology
The observed redshift distribution of Ly α lines and metal systems is examined in order to discriminate and to trace the evolution of structure elements observed in the galaxy distribution, at small redshifts, and to test the theoretical description of structure evolution. We show that the expected evolution of a filamentary component of structure describes quite well the redshift distribution of metal systems and stronger Ly α lines with log( N H i )14, at z 3. The redshift distribution of weaker Ly α lines can be attributed to the population of poorer structure elements (Zel'dovich pancakes), which were formed at high redshifts from the invisible dark matter and non‐luminous baryonic matter, and which at lower redshifts are mainly merged and dispersed.