Results 81 to 90 of about 32,240 (255)

Behavior of the Lyα Damping Wings as a Function of Reionization Topology

The Astrophysical Journal
The 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, Frederick B. Davies, Prakash Gaikwad, Fahad Nasir, Sarah E. I. Bosman   +4 more
doaj   +1 more source

Radio Foregrounds for the 21cm Tomography of the Neutral Intergalactic Medium at High Redshifts

, 2001
Absorption or emission against the cosmic microwave background radiation (CMB) may be observed in the redshifted 21cm line if the spin temperature of the neutral intergalactic medium prior to reionization differs from the CMB temperature.
Cavaliere A., Hales S. E. G., Laing R. A., Martin J. Rees, Peacock J. A., Rosalba Perna, Scheuer P. A. G., Scott D., Scott D., Shaver P. A., Tegmark M., Tiziana Di Matteo, Tom Abel   +12 more
core   +1 more source

MIXING METALS UNDER STRIPPING GALACTIC GASEOUS HALOES: RADIATIVE LOSSES

Odessa Astronomical Publications, 2008
We present two-dimensional numerical model for mixing of metals in the intergalactic medium under stripping of a galactic gaseous halo both in adiabatic and radiative cases.
S. Yu. Dedikov, Yu. A. Shchekinov, E. O. Vasiliev   +2 more
doaj   +1 more source

The Morphology and Kinematics of a Giant, Symmetric Nebula around a Radio-loud Quasar 3C 57: Extended Rotating Gas or Biconical Outflows?

The Astrophysical Journal
Gas flows between galaxies and the circumgalactic medium play a crucial role in galaxy evolution. When ionized by a quasar, these gas flows can be directly traced as giant nebulae. We present a study of a giant nebula around a radio-loud quasar, 3C 57 at
Zhuoqi (Will) Liu, Sean D. Johnson, Jennifer I-Hsiu Li, Benoît Epinat, Gwen C. Rudie, Ana Monreal-Ibero, Sebastiano Cantalupo, Zhijie Qu, Mandy C. Chen, Wolfram Kollatschny, Sowgat Muzahid, Fakhri S. Zahedy, Elise Kesler, Nishant Mishra   +13 more
doaj   +1 more source

Cosmological Blast Waves and the Intergalactic Medium [PDF]

The Astrophysical Journal, 1996
Winds from protogalactic starbursts and quasars can drive shocks that heat, ionize, and enrich the intergalactic medium. The Sedov-Taylor solution for point-like explosions adequately describes these blastwaves early in their development, but as the time since the explosion ($t - t_1$) approaches the age of the universe ($t$), cosmological effects ...
openaire   +2 more sources

Discovery of Optically Emitting Circumgalactic Nebulae around the Majority of UV-luminous Quasars at Intermediate Redshift

The Astrophysical Journal
We report the discovery of large, ionized, [O ii ]-emitting circumgalactic nebulae around the majority of 30 UV-luminous quasars at z = 0.4–1.4 observed with deep, wide-field integral field spectroscopy with the Multi-Unit Spectroscopy Explorer (MUSE) by
Sean D. Johnson, Zhuoqi (Will) Liu, Jennifer I-Hsiu Li, Joop Schaye, Jenny E. Greene, Sebastiano Cantalupo, Gwen C. Rudie, Zhijie Qu, Hsiao-Wen Chen, Marc Rafelski, Sowgat Muzahid, Mandy C. Chen, Thierry Contini, Wolfram Kollatschny, Nishant Mishra, Patrick Petitjean, Michael Rauch, Fakhri S. Zahedy   +17 more
doaj   +1 more source

Observational Predictions for the Survival of Atomic Hydrogen in Simulated Fornax-like Galaxy Clusters

The Astrophysical Journal
The presence of dense, neutral hydrogen clouds in the hot, diffuse intragroup and intracluster (IC) medium is an important clue to the physical processes controlling the survival of cold gas and sheds light on cosmological baryon flows in massive halos ...
Avinash Chaturvedi, Stephanie Tonnesen, Greg L. Bryan, Gergö Popping, Michael Hilker, Paolo Serra, Shy Genel   +6 more
doaj   +1 more source

Particle energy cascade in the intergalactic medium [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
We study the development of high energy (E_in < 1TeV) cascades produced by a primary electron of energy E_in injected into the intergalactic medium (IGM). To this aim we have developed the new code MEDEA (Monte Carlo Energy DEposition Analysis) which includes Bremsstrahlung and Inverse Compton (IC) processes, along with H/He collisional ionizations ...
Valdés, M., Evoli, C., FERRARA, ANDREA
openaire   +2 more sources

A Classification Scheme for Quasar Absorption Lines

The Astrophysical Journal
We present a method to classify intergalactic absorption lines and apply it to 10,772 low-redshift systems. The classification gives the number of components (reflecting the kinematics) in four different ionization phases, using detections and ...
Benjamin E. Rosenwasser, Bart P. Wakker, Blair D. Savage   +2 more
doaj   +1 more source

An X-ray WHIM metal absorber from a Mpc-scale empty region of space

, 2012
We report a detection of an absorption line at ~44.8 {\AA} in a > 500 ks Chandra HRC-S/LETG X-ray grating spectrum of the blazar H 2356-309. This line can be identified as intervening CV-K{\alpha} absorption, at z\approx0.112, produced by a warm (log T =
Buote, Cen, Cen, Colless, Danforth, Danforth, Davé, F. Nicastro, Falomo, Fang, Fukugita, Giroletti, Kaastra, Krongold, L. Zappacosta, R. Maiolino, Shull, Stocke, Tripp, Williams, Y. Krongold, Yao, Zappacosta   +22 more
core   +1 more source