Simulations of the Intergalactic Medium
نویسندگان
چکیده
منابع مشابه
Simulations of the Intergalactic Medium
I present a review by epoch of baryons in the intergalac-tic medium (IGM), from the first star until today. Recent observations indicate a protracted period of reionization, suggesting multiple populations of reionizers; detection of these z ∼ > 6 sources is a key goal that is now coming within reach. The optical Lyman alpha forest (2 ∼ < z ∼ < 4) is well-described by the Fluctuating Gunn-Peter...
متن کاملNumerical Simulations of the Intergalactic Medium
The intergalactic medium at redshifts 2–6 can be studied observationally through the absorption features it produces in the spectra of background quasars. Most of the UV-absorption lines arise in mildly overdense regions, which can be simulated reliably with current hydrodynamical simulations. Comparison of observed and simulated spectra allows one to put contraints on the model’s parameters.
متن کاملNumerical simulations of the Warm-Hot Intergalactic Medium
In this paper we review the current predictions of numerical simulations for the origin and observability of the warm hot intergalactic medium (WHIM), the diffuse gas that contains up to 50 per cent of the baryons at z ∼ 0. During structure formation, gravitational accretion shocks emerging from collapsing regions gradually heat the intergalactic medium (IGM) to temperatures in the range T ∼ 10...
متن کاملMetal enrichment of the intergalactic medium in cosmological simulations
Observations have established that the diffuse intergalactic medium (IGM) at z ∼ 3 is enriched to ∼ 10 solar metallicity and that the hot gas in large clusters of galaxies (ICM) is enriched to 1/3−1/2Z⊙ at z = 0. Metals in the IGM may have been removed from galaxies (in which they presumably form) during dynamical encounters between galaxies, by ram-pressure stripping, by supernova-driven winds...
متن کاملCosmological Simulations of Intergalactic Medium Enrichment from Galactic Outflows
We investigate models of self-consistent chemical enrichment of the intergalactic medium (IGM) from z = 6.0 → 1.5, based on hydrodynamic simulations of structure formation that explicitly incorporate outflows from star forming galaxies. Our main result is that outflow parameterizations derived from observations of local starburst galaxies, in particular momentum-driven wind scenarios, provide t...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2005
ISSN: 0074-1809
DOI: 10.1017/s007418090019669x