Results 121 to 130 of about 2,374,273 (270)
Resistive Magnetic Field Generation at Cosmic Dawn [PDF]
, 2010 Relativistic charged particles (CR for cosmic-rays) produced by Supernova explosion of the first generation of massive stars that are responsible for the re-ionization of the universe escape into the intergalactic medium, carrying an electric current. Charge imbalance and induction give rise to a return current, $\vec j_t$, carried by the cold thermal ...
arxiv +1 more source
PAPER-64 CONSTRAINTS ON REIONIZATION. II. THE TEMPERATURE OF THE z = 8.4 INTERGALACTIC MEDIUM [PDF]
, 2015 We present constraints on both the kinetic temperature of the intergalactic medium (IGM) at z = 8.4, and on models for heating the IGM at high-redshift with X-ray emission from the first collapsed objects.
J. Pober +26 more
semanticscholar +1 more source
The Spread of Metals into the Low-redshift Intergalactic Medium [PDF]
, 2017 We investigate the association between galaxies and metal-enriched and metal-deficient absorbers in the local universe (z < 0.16) using a large compilation of far-ultraviolet spectra of bright active galactic nuclei targets observed with the Cosmic ...
Cameron T. Pratt +3 more
semanticscholar +1 more source
The Multiphase Intergalactic Medium towards PKS 2155-304
, 2003 We study the cluster of H I and O VI absorption systems and the claimed detection of O VIII absorption from the intergalactic medium at z ~ 0.0567, associated with a group of galaxies toward the BL Lac object PKS 2155-304. As measured by spectrographs on
Giroux, Mark +2 more
core +2 more sources
Constrain intergalactic medium from the SZ effect map
, 2006 In this paper, we try to detect the SZ effect in the 2MASS DWT clusters and less bound objects in order to constrain the warm-hot intergalactic medium distribution on large scales by cross-correlation analysis.
Cao, Liang, Chu, Yao-Quan, Zuo, Wei
core +1 more source
CHARACTERIZING THE PRESSURE SMOOTHING SCALE OF THE INTERGALACTIC MEDIUM [PDF]
, 2015 The thermal state of the intergalactic medium (IGM) at z < 6 constrains the nature and timing of cosmic reionization events, but its inference from the Lyα forest is degenerate with the 3D structure of the IGM on ∼100 kpc scales, where, analogous to the ...
Girish Kulkarni +4 more
semanticscholar +1 more source
Quasar Absorption Lines and the Intergalactic Medium [PDF]
arXiv, 1996 The importance of HST for the study of quasar absorption lines and of the nature of the intergalactic medium is illustrated by reviewing selected results from past HST observations. Topics reviewed include the study of Ly-alpha absorbers at low redshift and the search for a diffuse IGM at high redshifts.
arxiv
The Gunn-Peterson effect and the Lyman alpha forest [PDF]
, 1997 We show that spatial correlations in a stochastic large scale velocity field in an otherwise smooth intergalactic medium (homogeneous comoving density) superposed on the general Hubble flow, may cause a `line-like' structure in QSO spectra similar to the population of unsaturated Ly-alpha forest lines which usually are attributed to individual clouds ...
arxiv +1 more source
Constraints on the temperature of the intergalactic medium at z = 8.4 with 21-cm observations [PDF]
, 2015 We compute robust lower limits on the spin temperature, $T_{\rm S}$, of the $z=8.4$ intergalactic medium (IGM), implied by the upper limits on the 21-cm power spectrum recently measured by PAPER-64.
B. Greig, A. Mesinger, J. Pober
semanticscholar +1 more source
High-Velocity Clouds and the Local Intergalactic Medium [PDF]
, 2006 In this article I review recent observations of the gaseous halos of galaxies and the intergalactic medium at low redshift. In the first part I discuss distribution, metal content, and physical properties of the Galactic intermediate- and high-velocity clouds and the hot halo of the Milky Way.
arxiv +1 more source