Results 81 to 90 of about 2,334,856 (294)
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
Strategy to Explore Magnetized Cosmic Web with Forthcoming Large Surveys of Rotation Measure
Galaxies, 2018 The warm-hot intergalactic medium (WHIM) is a candidate for the missing baryons in the Universe. If the WHIM is permeated with the intergalactic magnetic field (IGMF), the Faraday rotation measure (RM) of the WHIM is imprinted in linearly-polarized ...
Takuya Akahori
doaj +1 more source
Metal enrichment of the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 Accepted for publication in the MNRAS. Additional material including color gif plots and MPEG movies is available at http://astron.berkeley.edu/~gnedin/metigm ...
openaire +4 more sources
Primordial non-Gaussianities in the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 10 pages, 7 figures.
Viel, Matteo +5 more
openaire +7 more sources
Gamma‐Ray Bursts: A Radio Perspective
Advances in Astronomy, Volume 2016, Issue 1, 2016., 2016 Gamma‐ray bursts (GRBs) are extremely energetic events at cosmological distances. They provide unique laboratory to investigate fundamental physical processes under extreme conditions. Due to extreme luminosities, GRBs are detectable at very high redshifts and potential tracers of cosmic star formation rate at early epoch. While the launch of Swift and
Poonam Chandra, WeiKang Zheng
wiley +1 more source
The Astrophysical JournalThe variations in Ly α forest opacity observed at z > 5.3 between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field alone.
Frederick B. Davies +18 more
doaj +1 more source
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
openaire +2 more sources
The Dispersion of Fast Radio Bursts from a Structured Intergalactic Medium at Redshifts z < 1.5 [PDF]
, 2017 We analyze the sources of free electrons that produce the large dispersion measures, (in units of cm−3 pc), observed toward fast radio bursts (FRBs).
J. Shull, C. Danforth
semanticscholar +1 more source