Results 11 to 20 of about 5,149 (236)
Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley +1 more source
Phenomenological approach to the modelling of elliptical galaxies: The problem of the mass-to-light ratio [PDF]
Serbian Astronomical Journal, 2007 In this paper the problem of the phenomenological modelling of elliptical galaxies using various available observational data is presented. Recently, Tortora, Cardona and Piedipalumbo (2007) suggested a double power law expression for the global ...
Samurović S.
doaj +1 more source
On the ellipticity of galaxy clusters [PDF]
Proceedings of the International Astronomical Union, 2004 We analysed 246 scanned ACO clusters and we do not find any dependence of galaxy cluster ellipticity on redshift.
J. Krywult, Monika Biernacka, Piotr Flin
openaire +3 more sources
Galaxies, 2022 The observed Tully-Fisher and Faber-Jackson laws between the baryonic mass of galaxies and the velocity of motion of stars at the edge of galaxies are explained within the framework of the model of accretion of galaxies around supermassive black holes ...
Nick Gorkavyi
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Gravitational Lensing by Elliptical Galaxies [PDF]
Symposium - International Astronomical Union, 2002 The probability that high-redshift quasars are gravitationally-lensed by intervening galaxies increases rapidly with the cosmological constant, ΩΛ0 (whilst being only weakly dependent on the density parameter, Ωm0), and the low number of lenses observed implies that ΩΛ0 ≲ 0.7 (e.g. Kochanek 1996).
Rachel L. Webster +2 more
openaire +7 more sources
The Astrophysical Journal, 2023 In this paper, we present the simple, one-step, self-consistent, and fast resonance scattering model rsapec based on the AtomDB database. This model can be used as an alternative to the commonly used APEC model for fitting X-ray spectra with optically ...
Priyanka Chakraborty +4 more
doaj +1 more source
Chaos and Elliptical Galaxies [PDF]
CELESTIAL MECHANICS AND DYNAMICAL ASTRONOMY, 1996 uuencoded gziped PostScript, 12 pages including ...
openaire +4 more sources
The Shapes and Ages of Elliptical Galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 Normally elliptical galaxies are thought to be old, evolved systems, but recently a controversy has arisen over the age of ellipticals. Measurements by Gonzáles (1993, Ph.D. thesis, UCSC) show that the Hβ absorption indices of ellipticals span a range of values.
Jong, R, Davies, R
openaire +8 more sources
Investigation of the Fundamental Plane Relationship For the Evolution of the Elliptical and Lenticular Galaxies [PDF]
مجلة التربية والعلمThe Fundamental Plane relates the effective radius and surface brightness of an early-type galaxy to its velocity dispersion. It is important in understanding galaxy formation and evolution processes. The present work aims to investigate this relation as
Khalid Mohammed
doaj +1 more source