Results 31 to 40 of about 54,392 (134)
Primordial non-Gaussianities in the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 10 pages, 7 figures.
Viel, Matteo +5 more
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A hot intergalactic medium? [PDF]
Monthly Notices of the Royal Astronomical Society, 1986 On a de nouveau examine l'hypothese d'un milieu intergalactique chaud produisant le fond RX 5-200 keV, en tenant compte des corrections relativistes pour l'emissivite du gaz, la thermodynamique et la diffusion ...
P. W. Guilbert, A. C. Fabian
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Metals in the intergalactic medium [PDF]
Proceedings of the International Astronomical Union, 2005 The absorption lines seen in the spectra of quasars trace gas over a very large range of overdensities, from galaxies to voids and probably account for most of the baryons at high redshift. Once thought to be a chemically pristine remnant of the Big Bang, the Lyman alpha forest has now been shown to contain significant quantities of metals.
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The intergalactic medium in the cosmic web [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractThe intergalactic medium (IGM) accounts for ≳ 90% of baryons at all epochs and yet its three dimensional distribution in the cosmic web remains mostly unknown. This is so because the only feasible way to observe the bulk of the IGM is through intervening absorption line systems in the spectra of bright background sources, which limits its ...
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Reionization of the Intergalactic Medium
, 2014 Review Lecture given at New Horizons for Observational Cosmology, International School of Physics Enrico Fermi, Varenna, July 1-6, 2013, eds. A. Melchiorri, A. Cooray, E. Komatsu, to be published by the Italian Society of Physics.
Stefania Pandolfi, Andrea Ferrara
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Observational Tests of Intergalactic Enrichment Models [PDF]
, 2005 We summarize recent results assessing the carbon and silicon abundances of the intergalactic medium (IGM) using the `pixel optical depth' technique. We briefly discuss the implications of these results for models of intergalactic enrichment, focusing on distinguishing `early' z >> 4 enrichment by the first generations of stars and objects from `late ...
arxiv +1 more source
Intergalactic medium heating by dark matter [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 13 pages, 7 figures; MNRAS, in press; matches the published ...
Ripamonti, E. +2 more
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Gamma-ray induced cascades and magnetic fields in intergalactic medium [PDF]
Phys.Rev.D80:023010,2009, 2009 We present the results of Monte-Carlo simulations of three-dimensional electromagnetic cascade initiated by interactions of the multi-TeV gamma-rays with the cosmological infrared/optical photon background in the intergalactic medium. Secondary electrons in the cascade are deflected by the intergalactic magnetic fields before they scatter on CMB ...
arxiv +1 more source
A model for the distribution of the intergalactic medium [PDF]
The Astrophysical Journal, 1990 The evolution and distribution of the intergalactic medium (IGM) in a universe dominated by cold dark matter with Omega(0) = 1 and h = 0.5 are investigated. Galaxies form and eject energy into the IGM from z about 20 up to the present, and the distribution of the IGM is dominated by large connected structures.
Ryu, Dongsu +2 more
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Particle energy cascade in the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We study the development of high energy (E_in < 1TeV) cascades produced by a primary electron of energy E_in injected into the intergalactic medium (IGM). To this aim we have developed the new code MEDEA (Monte Carlo Energy DEposition Analysis) which includes Bremsstrahlung and Inverse Compton (IC) processes, along with H/He collisional ionizations ...
Valdés, M., Evoli, C., FERRARA, ANDREA
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