Results 71 to 80 of about 2,339,319 (247)
The Scattering of FRBs by the Intergalactic Medium: Variations, Strength, and Dependence on Dispersion Measures [PDF]
Astrophysical Journal, 2018 The scattering of fast radio bursts (FRBs) by the intergalactic medium (IGM) is explored using cosmological hydrodynamical simulations. We confirm that the scattering by the clumpy IGM has significant line-of-sight variations.
Weishan Zhu, Longlong Feng, Fu-Wen Zhang
semanticscholar +1 more source
The Distortion of the Cosmic Microwave Background Spectrum Due to Intergalactic Dust [PDF]
, 2016 Infrared emission from intergalactic dust might compromise the ability of future experiments to detect subtle spectral distortions in the Cosmic Microwave Background (CMB) from the early Universe. We provide the first estimate of foreground contamination of the CMB signal due to diffuse dust emission in the intergalactic medium.
arxiv +1 more source
Galactic Winds in the Intergalactic Medium
The Astrophysical Journal, 2002 We have performed hydrodynamical simulations to investigate the effects of galactic winds on the high-redshift (z=3) universe. Strong winds suppress the formation of low-mass galaxies significantly, and the metals carried by them produce C IV absorption lines with properties in reasonable agreement with observations. The winds have little effect on the
THEUNS T +5 more
openaire +5 more sources
X-ray ionization of the intergalactic medium by quasars [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We investigate the impact of quasars on the ionization of the surrounding intergalactic medium (IGM) with the radiative transfer code \texttt{CRASH4}, now accounting for X-rays and secondary electrons.
L. Graziani +3 more
semanticscholar +1 more source
A New Constraint on the Simulation of the Intergalactic Medium through the Evolution of the Neutral Hydrogen Fraction in the Epoch of Reionization [PDF]
arXiv, 2023 The thermal history of the intergalactic medium is full of extremely useful data in the field of astrophysics and cosmology. In other words, by examining this environment in different redshifts, the effects of cosmology and astrophysics can be observed side by side.
arxiv
The Fractal Geometry of the Cosmic Web and Its Formation
Advances in Astronomy, Volume 2019, Issue 1, 2019., 2019 The cosmic web structure is studied with the concepts and methods of fractal geometry, employing the adhesion model of cosmological dynamics as a basic reference. The structures of matter clusters and cosmic voids in cosmological N‐body simulations or the Sloan Digital Sky Survey are elucidated by means of multifractal geometry.
Jose Gaite, Geza Kovacs
wiley +1 more source
Colour corrections for high redshift objects due to intergalactic attenuation [PDF]
Mon.Not.Roy.Astron.Soc. 365 (2006) 807-812, 2005 Corrections to the magnitudes of high redshift objects due to intergalactic attenuation are computed using current estimates of the properties of the intergalactic medium. The results of numerical simulations are used to estimate the contributions to resonant scattering from the higher order Lyman transitions.
arxiv +1 more source
Measurement of the small-scale structure of the intergalactic medium using close quasar pairs [PDF]
Science, 2017 Using quasar pairs to measure smoothness Space between galaxies is filled with a tenuous gas known as the intergalactic medium (IGM). The presence of hydrogen atoms in the IGM at different redshifts imprints a series of absorption lines in the spectra of
Alberto Rorai +12 more
semanticscholar +1 more source
Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars [PDF]
Science 328:73-75,2010, 2010 Magnetic fields in galaxies are produced via the amplification of seed magnetic fields of unknown nature. The seed fields, which might exist in their initial form in the intergalactic medium, were never detected. We report a lower bound $B\ge 3\times 10^{-16}$~gauss on the strength of intergalactic magnetic fields, which stems from the nonobservation ...
arxiv +1 more source
Gamma‐Ray Burst Prompt Correlations
Advances in Astronomy, Volume 2018, Issue 1, 2018., 2018 The mechanism responsible for the prompt emission of gamma‐ray bursts (GRBs) is still a debated issue. The prompt phase‐related GRB correlations can allow discriminating among the most plausible theoretical models explaining this emission. We present an overview of the observational two‐parameter correlations, their physical interpretations, and their ...
M. G. Dainotti +3 more
wiley +1 more source