Results 81 to 90 of about 31,186 (206)
Bird's-eye View of Molecular Gas across Stephan's Quintet Galaxy Group and Intragroup Medium
The Astrophysical JournalWe present the large-scale distribution and kinematics of cold molecular gas across the compact galaxy group Stephan’s Quintet, based on CO(2–1) observations performed with the Atacama Compact Array (ACA) and CO(1–0) data from the Combined Array for ...
B. H. C. Emonts +17 more
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Astronomy & AstrophysicsContext. The distribution and the abundance of metals in the intergalactic medium (IGM) have strong implications for galaxy formation and evolution models. The ionic transitions of heavy elements in quasar spectra can be used to probe both the mechanisms
Di Stefano S. +7 more
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Statistical Properties of DLAs and sub-DLAs [PDF]
, 2001 Quasar absorbers provide a powerful observational tool with which to probe both galaxies and the intergalactic medium up to high redshift. We present a study of the evolution of the column density distribution, f(N,z), and total neutral hydrogen mass in ...
Céline Péroux +4 more
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Simulations of the Intergalactic Medium [PDF]
Symposium - International Astronomical Union, 2005 I present an epochal review of baryons in the intergalactic medium (IGM), from the reionization epoch until today. Recent observations indicate a protracted period of reionization, suggesting multiple populations of reionizers; detection of these z ≳ 6 sources is a key goal that is now coming within reach.
openaire +2 more sources
Chronicling the Reionization History at 6 ≲ z ≲ 7 with Emergent Quasar Damping Wings
The Astrophysical JournalThe spectra of high-redshift ( z ≳ 6) quasars contain valuable information on the progression of the Epoch of Reionization. At redshifts z < 6, the observed Lyman-series forest shows that the intergalactic medium is nearly ionized, while at z > 7 the ...
Dominika Ďurovčíková +8 more
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Filaments and sheets of the warm-hot intergalactic medium
, 2012 Filaments, forming in the context of cosmological structure formation, are not only supposed to host the majority of the baryons at low redshifts in the form of the WHIM, but also to supply forming galaxies at higher redshifts with a substantial amount ...
Klar, J. S., Mücket, J. P.
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MeV Cosmic-Ray Electrons Modify the TeV Pair-beam Plasma Instability
The Astrophysical JournalRelativistic pair beams created in the intergalactic medium (IGM) by TeV gamma rays from blazars are expected to produce a detectable GeV-scale electromagnetic cascade, but the cascade component is absent in the spectra of many hard-spectrum TeV-emitting
Mahmoud Alawashra +4 more
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A chemical evolution model for galaxy clusters [PDF]
, 2001 We develop a toy-model for the chemical evolution of the intracluster medium, polluted by the galactic winds from elliptical galaxies. The model follows the "galaxy formation history" of cluster galaxies, constrained by the observed luminosity function ...
Chiosi, C., Moretti, A., Portinari, L.
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The intergalactic medium (IGM) comprises all the matter that lies between galaxies. Hosting the vast majority ($\gtrsim 90\%$) of the baryons in the Universe, the IGM is a critical reservoir and probe for cosmology and astrophysics, providing insights into large-scale structure formation and galaxy evolution.
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Revised Constraints on the Fast Radio Burst Population from the First CHIME/FRB Catalog
The Astrophysical JournalIn this paper, we investigate the fast radio burst (FRB) population using the first CHIME/FRB catalog. We first reconstruct the extragalactic dispersion measure–redshift relation (DM _E – z relation) from well-localized FRBs, then use it to infer the ...
Hai-Nan Lin, Rui Zou
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