Results 101 to 110 of about 2,334,856 (294)
Do cosmic rays heat the early intergalactic medium [PDF]
, 2017 Cosmic rays (CRs) govern the energetics of present-day galaxies and might have also played a pivotal role during the Epoch of Reionization. In particular, energy deposition by low-energy ($E \lesssim 10$ MeV) CRs accelerated by the first supernovae ...
N. Leite +5 more
semanticscholar +1 more source
The Astrophysical JournalThe shallow potential wells of star-forming dwarf galaxies make their surrounding circumgalactic and intergalactic medium (CGM/IGM) sensitive laboratories for studying the inflows and outflows thought to regulate galaxy evolution.
Nishant Mishra +15 more
doaj +1 more source
The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog
The Astronomical Journal, 2023 We conducted a deep spectroscopic survey, named SSA22-HIT, in the SSA22 field with the DEep Imaging MultiObject Spectrograph (DEIMOS) on the Keck telescope, designed to tomographically map high- z H i gas through analysis of Ly α absorption in background
Ken Mawatari +18 more
doaj +1 more source
The intergalactic medium in the cosmic web [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractThe intergalactic medium (IGM) accounts for ≳ 90% of baryons at all epochs and yet its three dimensional distribution in the cosmic web remains mostly unknown. This is so because the only feasible way to observe the bulk of the IGM is through intervening absorption line systems in the spectra of bright background sources, which limits its ...
openaire +2 more sources
Constraints on dark matter-baryon scattering from the temperature evolution of the intergalactic medium [PDF]
, 2017 The thermal evolution of the intergalactic medium (IGM) can serve as a sensitive probe of cosmological heat sources and sinks. We employ it to limit interactions between dark matter and baryons.
Julian B. Muñoz, A. Loeb
semanticscholar +1 more source
Observational Tests of Intergalactic Enrichment Models [PDF]
, 2005 We summarize recent results assessing the carbon and silicon abundances of the intergalactic medium (IGM) using the `pixel optical depth' technique. We briefly discuss the implications of these results for models of intergalactic enrichment, focusing on distinguishing `early' z >> 4 enrichment by the first generations of stars and objects from `late ...
arxiv +1 more source
Behavior of the Lyα Damping Wings as a Function of Reionization Topology
The Astrophysical JournalThe damping wing signatures in high-redshift quasars have proven instrumental in studying the epoch of reionization. With the upcoming Euclid mission set to discover many more quasars, it is crucial to explore what this new set of quasars might reveal ...
Yash M. Sharma +4 more
doaj +1 more source
The Astrophysical Journal, 2023 We present cosmological-scale three-dimensional neutral hydrogen (H i ) tomographic maps at z = 2–3 over a total of 837 deg ^2 in two blank fields that are developed with Ly α forest absorptions of 14,736 background Sloan Digital Sky Survey (SDSS ...
Dongsheng Sun +14 more
doaj +1 more source
Probing the Universe with Fast Radio Bursts
Universe, 2021 Fast Radio Bursts (FRBs) represent a novel tool for probing the properties of the universe at cosmological distances. The dispersion measures of FRBs, combined with the redshifts of their host galaxies, has very recently yielded a direct measurement of ...
Shivani Bhandari, Chris Flynn
doaj +1 more source
Reionization of the Intergalactic Medium
, 2014 Review Lecture given at New Horizons for Observational Cosmology, International School of Physics Enrico Fermi, Varenna, July 1-6, 2013, eds. A. Melchiorri, A. Cooray, E. Komatsu, to be published by the Italian Society of Physics.
Stefania Pandolfi, Andrea Ferrara
openaire +3 more sources