Results 91 to 100 of about 1,993,973 (222)

Detecting metal enrichment of the intergalactic medium with the two-point correlation function of the flux

Astronomy & Astrophysics
Context. 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., D’Odorico V., Cupani G., Milaković D., Trost A., Cristiani S., Viel M., Carswell R. F.   +7 more
doaj   +1 more source

Constraining quasar and intergalactic medium properties through bubble detection in redshifted 21-cm maps

, 2012
The infrared detection of a z > 7 quasar has opened up a window to directly probe the intergalactic medium (IGM) during the epoch of reionization. It is anticipated that future observations will yield more quasars extending to higher redshifts.
Choudhury, T. Roy, Majumdar, Suman, Bharadwaj, Somnath   +2 more
core   +1 more source

MeV Cosmic-Ray Electrons Modify the TeV Pair-beam Plasma Instability

The Astrophysical Journal
Relativistic 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, Yuanyuan Yang, Christopher M. Hirata, Heyang Long, Martin Pohl   +4 more
doaj   +1 more source

Recombination Clumping Factor of Physically Defined Intergalactic Medium at the Epoch of Reionization

The Astrophysical Journal
The recombination clumping factor, C , is a key parameter in modeling cosmic reionization, but its value is sensitive to the definition of the intergalactic medium (IGM).
Yuri Oku, Renyue Cen
doaj   +1 more source

Assessing the benefits of the "Intergalactic World" social emotional learning program for 8-12-year-old children in Portugal: perspectives from teachers and caregivers. [PDF]

Front Psychol, 2023
Antunes R, Alexandre J, Guedes M, Filipe MG, Veríssimo M.   +4 more
europepmc   +1 more source

Constraining the thermal history of the warm-hot intergalactic medium

, 2005
We have identified a large-scale structure traced by galaxies at z=0.8, within the Lockman Hole, by means of multi-object spectroscopic observations. By using deep XMM images we have investigated the soft X-ray emission from the Warm-Hot Intergalactic ...
Ferrara, A., R. Maiolino, Gilli, R., L. Zappacosta, Zappacosta, L., Mannucci, F., A. Finoguenov, R. Gilli, FERRARA, ANDREA, Finoguenov, A., F. Mannucci, Maiolino, R., A. Ferrara   +12 more
core   +1 more source

Revised Constraints on the Fast Radio Burst Population from the First CHIME/FRB Catalog

The Astrophysical Journal
In 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
doaj   +1 more source

On the Physical Nature of Lyα Transmission Spikes in High-redshift Quasar Spectra

The Astrophysical Journal
We investigate Lyman-alpha (Ly α ) transmission spikes at 5.2 < z < 6.8 using synthetic quasar spectra from the “Cosmic Reionization on Computers” simulations.
Hanjue Zhu, Nickolay Y. Gnedin, Camille Avestruz   +2 more
doaj   +1 more source

Reionization of the Intergalactic Medium

Proceedings of the International School of Physics “Enrico Fermi”, 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.
Ferrara A., Pandolfi S.
openaire   +2 more sources

The Dispersion Measure and Scattering of Fast Radio Bursts: Contributions from Multicomponents, and Clues for the Intrinsic Properties

The Astrophysical Journal Supplement Series
Fast radio bursts (FRBs) are luminous, millisecond-duration transients that offer great potential for probing the Universe, yet their physical origins remain unclear.
Jian-feng Mo, Weishan Zhu, Long-Long Feng   +2 more
doaj   +1 more source