Rauch, MichaelMurdin, P
The Evolution of the Lyman Alpha Forest From z ∼ 3 →0 Romeel Dav´e Steward Observatory, Univ. of Arizona, 933 N. Cherry Ave., Tucson, AZ, USA Abstract. I review results obtained from studies of the high-redshift Lyα forest, ...
Lyman-alpha-forest 例句 释义: 全部 更多例句筛选 1. But structure does, and the Lyman-alpha forest is very sensitive to it! 但结构需要,而且莱曼α森林对此极为敏感。 www.astronomy.com.cn© 2024 Microsoft 隐私声明和 Cookie 法律声明 广告 帮助 反馈...
Particle-Mesh Simulations of the Lyman-Alpha Forest 3 τ(u) = A dx ρ(x) ¯ ρ 2 T(x) −0.7 b −1 e −(u−u 0 ) 2 /b 2 (4) where u0 = xaHL box + v los and b = 2kBT/mH is the Doppler parameter, where mH is the mass of a hydrogen atom. The flux at...
Current Lyman-alpha forest power spectrum measurements probe comoving scales up to ~ 2-3 h^-1 Mpc at redshifts z ~ 2-4, providing one of the most robust ways to probe cosmological density fluctuations on relatively small scales. The suppression of structure growth due to the free-streaming...
J. Lyman-alpha emission from the Lyman-alpha forest. Mon. Not. R. Astron. Soc. 225, 1P–5P (1987). ADS Google Scholar Cantalupo, S., Porciani, C., Lilly, S. J. & Miniati, F. Fluorescent Lyα emission from the high-redshift intergalactic medium. Astrophys. J. 628, 61–75 (...
Lya forest,翻译一下就是莱曼a森林。Lya发射线是由H原子的电子从n=2能级跃迁到n=1能级时发出的,波长是121.6nm。(吸收线就是反过来嘛)。quasar的光谱中常常充满这样的发射线。当然,也会存在n=1跃迁到更高的能级甚至直接电离的可能。 两张QSO的光谱 n=3到n=1的跃迁光子波长为102.6nm,也叫Lyβ线;13.6eV的电...
Consistent with previous estimates, we find that a moderate fraction of the Ly α forest clouds have been enriched with heavy elements at a level significantly below solar abundance. However, unlike the fairly uniform distribution of Ly α forest lines, we show that the C IV absorption lines ...
Lyman-α forest constraints on the mass of warm dark matter and the shape of the linear power spectrum, Astrophys - Narayanan, Spergel, et al.V.K. Narayanan, D.N. Spergel, R. Dave and C.-P. Ma, Lyman-alpha forest constraints on the mass of warm dark matter and the shape of the...
Particle mesh simulations of the Lyman-alpha forest and the signature of Baryon Acoustic Oscillations in the intergalactic medium As an illustration we discuss the basic properties of the acoustic signal in the forest, the scaling of errors with noise and source number density, ... M White,A Po...