scholarly journals The column density distribution of the Lyman-alpha forest: A measure of small scale power

1997 ◽  
Author(s):  
Lam Hui ◽  
Nickolay Y. Gnedin ◽  
Yu Zhang
Keyword(s):  
Density Distribution ◽  
Column Density ◽  
Small Scale ◽  
Lyman Alpha ◽  
Lyman Alpha Forest

Gravitational collapse of small-scale structure as the origin of the Lyman-alpha forest

1994 ◽  
Vol 437 ◽  
pp. L9 ◽  
Author(s):  
Renyue Cen ◽  
Jordi Miralda-Escude ◽  
Jeremiah P. Ostriker ◽  
Michael Rauch
Keyword(s):  
Gravitational Collapse ◽  
Scale Structure ◽  
Small Scale ◽  
Lyman Alpha ◽  
Small Scale Structure ◽  
Lyman Alpha Forest

scholarly journals Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers

2018 ◽  
Vol 476 (3) ◽  
pp. 3716-3728 ◽  
Author(s):  
Keir K Rogers ◽  
Simeon Bird ◽  
Hiranya V Peiris ◽  
Andrew Pontzen ◽  
Andreu Font-Ribera ◽  
...  
Keyword(s):  
Column Density ◽  
Three Dimensional ◽  
Lyman Alpha ◽  
Lyman Alpha Forest ◽  
High Column

scholarly journals On the Origin of Metallicity in Lyman-Alpha Forest Systems

2002 ◽  
Vol 187 ◽  
pp. 123-127
Author(s):  
M. Chiba ◽  
B. B. Nath
Keyword(s):  
High Resolution ◽  
Column Density ◽  
Large Fraction ◽  
The Other ◽  
Absorption Lines ◽  
Lyman Alpha ◽  
Other Hand ◽  
Lyman Alpha Forest

Several recent observations indicate that even the low H I column density Lyα absorption lines may not be primordial, as they were previously thought to be. High-resolution observations using the Keck telescope (Cowie et al. 1995; Tytler et al 1995.; Songaila & Cowie 1996) have revealed that a large fraction of Lyα absorption lines with H I column density as low as NHI ~ 1014 cm−2 at redshift z ~ 3 are associated with metal lines (C IV). This fraction, hereafter denoted as fm, is estimated as 0.5-0.75. On the other hand, there is an indication that at low z a large fraction of Lyα absorption lines are directly associated with halos of visible galaxies. This fraction is hereafter denoted as fg. Lanzetta et al. (1995, hereafter LBTW) claimed fg ~ 0.6 at z ≲ 1 (see also Bowen, Pettini & Boyle 1997).

scholarly journals The lyman alpha forest in hierarchical cosmologies

1999 ◽  
Author(s):  
M. Machacek ◽  
G. L. Bryan ◽  
P. Anninos ◽  
A. Meiksin ◽  
M. L. Norman ◽  
...  
Keyword(s):  
Lyman Alpha ◽  
Lyman Alpha Forest
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