Results 21 to 30 of about 2,334,856 (294)

Probing the thermal state of the intergalactic medium at z > 5 with the transmission spikes in high-resolution  Ly α forest spectra [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We compare a sample of five high-resolution, high S/N  Ly α forest spectra of bright 6 < z < ∼6.5 QSOs aimed at spectrally resolving the last remaining transmission spikes at z > 5 with those obtained from mock absorption spectra from the Sherwoodand ...
P. Gaikwad, M. Rauch, M. Haehnelt, E. Puchwein, J. Bolton, L. Keating, Girish Kulkarni, V. Iršič, E. Bañados, G. Becker, E. Boera, F. Zahedy, Hsiao-Wen Chen, R. Carswell, J. Chardin, Alberto Rorai   +15 more
semanticscholar   +1 more source

Measurements of the z ∼ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample [PDF]

Astrophysical Journal, 2020
We report new measurements of the intergalactic medium (IGM) Lyα and Lyβ effective optical depth at 5.3 < z < 6.5, using a new sample of quasar sight lines including 32 quasars at 6.308 ≤ z ≤ 7.00.
Jinyi Yang, Feige Wang, Xiaohui Fan, J. Hennawi, F. Davies, M. Yue, A. Eilers, E. Farina, Xue-bing Wu, F. Bian, F. Pacucci, K. Lee   +11 more
semanticscholar   +1 more source

Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ionized fraction at that redshift
R. Ghara, R. Ghara, R. Ghara, S. Giri, S. Giri, G. Mellema, B. Ciardi, S. Zaroubi, S. Zaroubi, S. Zaroubi, I. Iliev, L. Koopmans, E. Chapman, S. Gazagnes, B. Gehlot, B. Gehlot, A. Ghosh, A. Ghosh, V. Jelic, Florent Mertens, Florent Mertens, R. Mondal, J. Schaye, M. Silva, K. Asad, R. Kooistra, R. Kooistra, M. Mevius, A. Offringa, A. Offringa, V. Pandey, V. Pandey, S. Yatawatta   +32 more
semanticscholar   +1 more source

The Intergalactic Medium [PDF]

Symposium - International Astronomical Union, 1982
The density of intergalactic gas may be an important parameter in the formation of extended radio sources. It may range from ∼ 0.1 particle cm−3 in the centres of some rich clusters of galaxies down to 10−8cm−3 or less in intercluster space. The possible influence of the intracluster gas surrounding NGC 1275 on its radio emission is discussed, and the ...
A. C. Fabian, A. K. Kembhavi
openaire   +2 more sources

Towards a Fregean psycholinguistics

Analytic Philosophy, EarlyView., 2023
Abstract This paper is partly exegetical, partly systematic. I argue that Frege's account of what he called “colouring” contains some important insights on how communication is related to mental states such as mental images or emotions. I also show that the Fregean perspective is supported by current research in psycholinguistics and that a full ...
Thorsten Sander
wiley   +1 more source

Metals in the intergalactic medium [PDF]

Astronomy & Astrophysics, 2004
We use high spectral resolution (R=45000) and high signal-to-noise ratio (S/N \~ 35-70 per pixel) spectra of 19 high-redshift (2.11. Our observations strongly suggest that the CIV/HI ratio decreases with decreasing tau(HI) with log[tau(CIV)]=1.3xlog[tau(HI)]-3.2. We do not detect CIV absorption statistically associated with gas of tau(HI)<1. However,
Aracil, Bastien, Petitjean, Patrick, Pichon, Christophe, Bergeron, Jacqueline   +3 more
openaire   +5 more sources

Magnetization of the intergalactic medium in the IllustrisTNG simulations: the importance of extended, outflow-driven bubbles [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We study the effects of galaxy formation physics on the magnetization of the intergalactic medium (IGM) using the IllustrisTNG simulations. We demonstrate that large-scale regions affected by the outflows from galaxies and clusters contain magnetic ...
Andrés Arámburo-García, K. Bondarenko, A. Boyarsky, D. Nelson, A. Pillepich, A. Sokolenko   +5 more
semanticscholar   +1 more source

Multiphase Gas Interactions on Subarcsec Scales in the Shocked Intergalactic Medium of Stephan’s Quintet with JWST and ALMA

The Astrophysical Journal, 2023
We combine James Webb Space Telescope (JWST) and Hubble Space Telescope imaging with Atacama Large Millimeter Array CO(2–1) spectroscopy to study the highly turbulent multiphase intergalactic medium (IGM) in Stephan’s Quintet on 25–150 pc scales ...
P. N. Appleton, P. Guillard, Bjorn Emonts, Francois Boulanger, Aditya Togi, William T. Reach, Kathleen Alatalo, M. Cluver, T. Diaz Santos, P.-A. Duc, S. Gallagher, P. Ogle, E. O’Sullivan, K. Voggel, C. K. Xu   +14 more
doaj   +1 more source

Power and the Aerial Sublime in Victor Pelevin

The Russian Review, Volume 82, Issue 4, Page 582-598, October 2023., 2023
Abstract This essay distinguishes flight as a salient trope throughout multiple Pelevin texts: Omon Ra (1992), Chapaev and the Void (1996), Generation P (1999), Empire V (2006), and Love for Three Zuckerbrins (2014). It examines flight through the aesthetics of the sublime—classical, (post)‐Soviet, and postmodern.
Sofya Khagi
wiley   +1 more source

Lyman-α transmission properties of the intergalactic medium in the CoDaII simulation [PDF]

Monthly notices of the Royal Astronomical Society, 2020
The decline in abundance of Lyman-α (Lyα) emitting galaxies at z ≳ 6 is a powerful and commonly used probe to constrain the progress of cosmic reionization.
M. Gronke, P. Ocvirk, C. Mason, J. Matthee, S. Bosman, J. Sorce, J. Lewis, K. Ahn, D. Aubert, Taha Dawoodbhoy, I. Iliev, P. Shapiro, G. Yepes   +12 more
semanticscholar   +1 more source