Results 51 to 60 of about 2,334,856 (294)
Anomaly in the Opacity of the Post-reionization Intergalactic Medium in the Lyα and Lyβ Forest [PDF]
Astrophysical Journal, 2019 We measure the intergalactic medium (IGM) opacity in the Lyα as well as in the Lyβ forest along 19 quasar sightlines between 5.5 ≲ zabs ≲ 6.1, probing the end stages of the reionization epoch. Owing to its lower oscillator strength, the Lyβ transition is
A. Eilers +3 more
semanticscholar +1 more source
A 5G Beam Selection Machine Learning Algorithm for Unmanned Aerial Vehicle Applications
Wireless Communications and Mobile Computing, Volume 2020, Issue 1, 2020., 2020 The unmanned aerial vehicles (UAVs) emerged into a promising research trend within the recurrent year where current and future networks are to use enhanced connectivity in these digital immigrations in different fields like medical, communication, and search and rescue operations among others.
Hao Meng +4 more
wiley +1 more source
Scintillation as a probe of the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 9 pages, 3 figures, accepted to ...
Andrea Ferrara, Rosalba Perna
openaire +4 more sources
On the Detectability of Visible-wavelength Line Emission from the Local Circumgalactic and Intergalactic Medium [PDF]
Astrophysical Journal, 2019 We describe a new approach to studying the intergalactic and circumgalactic medium in the local universe: direct detection through narrowband imaging of ultralow surface brightness visible-wavelength line emission.
D. Lokhorst +4 more
semanticscholar +1 more source
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 The two‐dimensional hydrogen atom in an external magnetic field is considered in the context of phase space. Using the solution of the Schrödinger equation in phase space, the Wigner function related to the Zeeman effect is calculated. For this purpose, the Bohlin mapping is used to transform the Coulomb potential into a harmonic oscillator problem ...
R. A. S. Paiva +5 more
wiley +1 more source
Temperature fluctuations in the intergalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 The temperature of the low-density intergalactic medium is set by the balance between adiabatic cooling resulting from the expansion of the universe, and photo-heating by the UV-background. We have analysed the Lyman-alpha forest of eleven high-resolution quasar spectra using wavelets, and find strong evidence of a marked jump in the temperature at the
Theuns, Tom +4 more
openaire +4 more sources
Thermal State of the Intergalactic Medium at z ∼ 2–4 [PDF]
Astrophysical Journal, 2019 We present a new method to infer parameters of the temperature–density relation in the intergalactic medium in the post-reionization epoch at z ∼ 2–4.
K. Telikova, P. Shternin, S. Balashev
semanticscholar +1 more source
Galaxies and the intergalactic medium: evolutionary interrelations
Odessa Astronomical Publications, 2017 During their life galaxies exchange in matter and energy with the intergalactic medium (IGM). This complex process is a most important factor in galactic evolution as well in evolution of the IGM.
B. M. Shustov
doaj +1 more source
Simulating the Enrichment of Fossil Radio Electrons by Multiple Radio Galaxies
Galaxies, 2023 We simulate the evolution of relativistic electrons injected into the intracluster medium by five radio galaxies. We study the spatial transport and the emission properties of the injected radio plasma over a ∼5 Gyr period, and the sequence of cooling ...
Franco Vazza +3 more
doaj +1 more source
Ionizing the intergalactic medium by star clusters: the first empirical evidence [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present a VLT/X-Shooter spectroscopy of the Lyman continuum (LyC) emitting galaxy Ion2 at z = 3.2121 and compare it to that of the recently discovered strongly lensed LyC emitter at z = 2.37, known as the Sunburst arc. Three main results emerge from
E. Vanzella +16 more
semanticscholar +1 more source