Results 41 to 50 of about 1,962,001 (214)
Astronomical Signatures of Dark Matter
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 Several independent astronomical observations in different wavelength bands reveal the existence of much larger quantities of matter than what we would deduce from assuming a solar mass to light ratio. They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of ...
Paul Gorenstein +2 more
wiley +1 more source
From Generalized Dirac Equations to a Candidate for Dark Energy
International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013 We consider extensions of the Dirac equation with mass terms m1 + iγ5m2 and im1 + γ5m2. The corresponding Hamiltonians are Hermitian and pseudo‐Hermitian (γ5 Hermitian), respectively. The fundamental spinor solutions for all generalized Dirac equations are found in the helicity basis and brought into concise analytic form.
U. D. Jentschura +4 more
wiley +1 more source
Shale Gas and the EU Internal Gas Market: Beyond the Hype and Hysteria. CEPS Working Document No. 369, September 2012 [PDF]
, 2012 This paper analyses the interplay between shale gas and the EU internal gas market. Drawing on data presented in the 2012 International Energy Agency’s report on unconventional gas and additional scenario analyses performed by the Joint Research Centre ...
Teusch, Jonas
core
Formation of Hot Intergalactic Gas by Gas Ejection from a Galaxy in an Early Explosive Era
, 1977 Chemical evolution of a galaxy in an early explosive era is studied by means of one zone model. Calculating the thermal properties of interstellar gas and the overlapping factor of expanding supernova-remnant shells, the gas escape conditions from a ...
IKEUCHI, Satoru, 池内, 了
core +1 more source
Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog
Computer Graphics Forum, Volume 44, Issue 3, June 2025.Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi +3 more
wiley +1 more source
Properties of the Hii Regions Derived Using Integral Field Spectroscopy
Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013 Here we review some of our more recent results on the observed properties of Hii regions using Integral Field Spectroscopy. In particular, we illustrate the use of this technique to study in detail the ionization conditions across the nebulae for galactic Hii regions (focused on the Orion Nebula) and the statistical study of large samples of ...
Sebastian F. Sánchez +1 more
wiley +1 more source
The Astrophysical Journal LettersThe red damping wing from neutral hydrogen in the intergalactic medium is a key predicted signature of ongoing reionization. One potential contaminant of the intergalactic damping wing signal is dense gas associated with foreground galaxies, which can ...
Frederick B. Davies +3 more
doaj +1 more source
The dynamical and thermodynamic effects of turbulence on the cosmic baryonic fluid
Astronomy & AstrophysicsBoth simulations and observations indicate that the so-called missing baryons reside in the intergalactic medium known as the warm-hot intergalactic medium (WHIM). In this study we employed the IllustrisTNG50-1 simulation to demonstrate that knowledge of
Wang Yun, Li Minxing, He Ping
doaj +1 more source
The Universe is at Most 88% Neutral at z = 10.6
The Astrophysical Journal Letters, 2023 Recent observations of GN-z11 with JWST have revealed a Ly α emission line with an equivalent width (EW) of 18 ± 2 Å. At z = 10.6, this galaxy is expected to lie in the heart of reionization.
Sean Bruton +3 more
doaj +1 more source
Models of the Intergalactic Gas in Stephan's Quintet
, 2009 To appear in the Proceedings of the Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies ...
Hwang, Jeong-Sun +3 more
openaire +2 more sources