2000/08/22 by Priya Jamkhedkar, Hu Zhan, Li-Zhi Fang · 19 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmic ray #Cosmology and Gravitation Theories #Distribution (mathematics) #Field (mathematics) #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Intermittency #Mass distribution #Spectral density #astro-ph
paper · pdf · doi:10.1086/312946
published in The Astrophysical Journal 543(1), L000 (IOP Publishing) · Accepted for publication in ApJ Letters, 12 pages, 3 figures
arxiv created 2000/08/22 · openalex publication_date 2000/11/01 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The intermittent behavior of the space-scale distribution of the Lyα-transmitted flux of QSO HS 1700+64 has been analyzed via a discrete wavelet transform. We found that there are two strong indications of intermittency on scales down to about 10 h -1 kpc: (1) the probability distribution function of the local fluctuations of the flux has a significantly long tail on small scales, and (2) the local power spectrum of the flux shows prominent spiky structures on small scales. Moreover, the local power spectrum, averaged on regions with different sizes, shows similar spiky structures. Therefore, the random mass density field traced by the Lyα forest is rougher on smaller scales, consistent with singular clustering.