Results 41 to 50 of about 30,791 (258)
Sources for Metals in the Intergalactic Medium [PDF]
The Astrophysical Journal, 2005 We present a discussion of possible sources of C, O, and Si in the IGM using the yields of VMSs and SNe II. The chemical evolution of the IGM is considered based on analytical phenomenological models of hierarchical structure formation. Two regimes are considered: one for gas expulsion by VMSs and SNe II in low-mass halos prior to dissociation of H2 ...
Qian, Y.-Z., Wasserburg, G. J.
openaire +6 more sources
PECULIARITIES OF MIXING METALS IN INTERGALACTIC AND INTERSTELLAR MEDIA
Odessa Astronomical Publications, 2008 We review the current status of the problem of metal mixing in the intergalactic and interstellar media. We give simple arguments for inefficiency of mixing metals because of a saturation of hydrodynamic (Rayleigh-Taylor and Kelvin-Helmholz ...
S. Yu. Dedikov +2 more
doaj +1 more source
A Direct Upper Limit on the Density of Cosmological Dust from the Absence of an X-ray Scattering Halo around the z=4.3 QSO 1508+5714 [PDF]
, 2006 We report on the results of a search for an intergalactic X-ray dust scattering halo in a deep observation of the bright, high-redshift quasar QSO 1508+5714 with the Chandra X-ray Observatory. We do not detect such a halo.
Andreea Petric +5 more
core +1 more source
Hydrodynamic Response of the Intergalactic Medium to Reionization [PDF]
The Astrophysical Journal, 2020 Abstract The intergalactic medium is expected to clump on scales down to M ⊙ before the onset of reionization. The impact of these small-scale structures on reionization is poorly understood despite the modern understanding that gas ...
Anson D’Aloisio +4 more
openaire +4 more sources
Simulating the Enrichment of Fossil Radio Electrons by Multiple Radio Galaxies
Galaxies, 2023 We simulate the evolution of relativistic electrons injected into the intracluster medium by five radio galaxies. We study the spatial transport and the emission properties of the injected radio plasma over a ∼5 Gyr period, and the sequence of cooling ...
Franco Vazza +3 more
doaj +1 more source
The Intergalactic Medium and Soft X-ray Background [PDF]
, 1999 I present an overview of some of the recent advances in our understanding of the distribution and evolution of the ordinary, baryonic matter in the universe. Two observations that strongly suggest that most of the baryons seen at high redshift ($z\ge 2$)
Cen, Renyue
core +3 more sources
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
The Astrophysical Journal Letters, 2022 We report the discovery of giant (50−100 kpc) [O ii ] emitting nebulae with MUSE in the field of TXS 0206−048, a luminous quasar at z = 1.13. “Down-the-barrel” UV spectra of the quasar show absorption at velocities coincident with those of the extended ...
Sean D. Johnson +12 more
doaj +1 more source
Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
, 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^{
A. Neronov +6 more
core +1 more source
The Astronomical Journal, 2023 We explore the role of galactic feedback on the low-redshift Ly α (Ly α ) forest ( z ≲ 2) statistics and its potential to alter the thermal state of the intergalactic medium. Using the Cosmology and Astrophysics with Machine Learning Simulations (CAMELS)
Megan Taylor Tillman +11 more
doaj +1 more source