Lyα HEATING OF INHOMOGENEOUS HIGH-REDSHIFT INTERGALACTIC MEDIUM
نویسندگان
چکیده
منابع مشابه
Lyman-α Heating of Inhomogeneous High-redshift Intergalactic Medium
The intergalactic medium (IGM) prior to the epoch of reionization consists mostly of neutral hydrogen gas. Lyman-α (Lyα) photons produced by early stars resonantly scatter off hydrogen atoms, causing energy exchange between the radiation field and the gas. This interaction results in moderate heating of the gas due to the recoil of the atoms upon scattering, which is of great interest for futur...
متن کاملFluorescent Lyα Emission from the High-redshift Intergalactic Medium
We combine a high-resolution hydro-simulation of the ΛCDM cosmology with two radiative transfer schemes (for continuum and line radiation) to predict the properties, spectra and spatial distribution of fluorescent Lyα emission at z ∼ 3. We focus on line radiation produced by recombinations in the dense intergalactic medium ionized by UV photons. In particular, we consider both a uniform backgro...
متن کاملAbundances in the high - redshift Intergalactic Medium
The enrichment of the intergalactic medium (IGM) with heavy elements provides us with a record of past star formation and with an opportunity to study the interactions between galaxies and their environments. We summarize current data analysis methods and observational constraints on abundances in the diffuse, high-redshift (z > 2) IGM. This review is targeted at interested outsiders and attemp...
متن کاملLyα versus X-ray heating in the high-z intergalactic medium
In this paper, we examine the effect of X-ray and Lyα photons on the intergalactic medium (IGM) temperature. We calculate the photon production from a population of stars and microquasars in a set of cosmological hydrodynamic simulations which self-consistently follow the dark matter dynamics, radiative processes as well as star formation, black hole (BH) growth and associated feedback processe...
متن کاملLyα Absorption Systems and the Intergalactic Medium
The last few years have seen a dramatic improvement in our understanding of the origin of Lyman α absorption systems. Hydrodynamic numerical simulations of cold dark matter dominated universes have shown that the many properties of the Lyman α absorption systems can be explained by a photoionized, space-filling, intergalactic medium. Lyman α lines offer promising probes of the photoionizing bac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2013
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/779/2/146