Results 11 to 20 of about 27,135 (218)
Progress of Theoretical Physics Supplement, 1962 Modern theories on the evolution of stars are extended to the phases of helium burning, carbon burning, and later burnings as far as possible, and the theoretical results are compared wth the Hertzsprung-Russell diagrams of star clusters. The topics discussed include nuclear generation and energy loss by neutrinos, quasi-static equilibrium, envelope ...
Hayashi, Chushiro +2 more
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Symposium - International Astronomical Union, 1999 The evolution of massive stars is far from being fully understood, as we outline by pointing to a number of open problems related to massive stars in the Magellanic Clouds. We argue that rotation may be a key ingredient in the physics of massive stars.
Langer, Norbert (Prof. Dr.) +1 more
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THE SOLITON STARS EVOLUTION [PDF]
International Journal of Modern Physics D, 1998 The evolution of a soliton star filled with fermions is studied in the framework of general relativity. Such a system could be described by the surface tension σ0, the bag constant B, and the fermion number density ρ. One of the parameters mentioned above could prevail in the system and thus affect the spacetime inside the bubble.
Bednarek, Ilona, Manka, Ryszard
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Evolution of Proto–Neutron Stars [PDF]
The Astrophysical Journal, 1999 We study the thermal and chemical evolution during the Kelvin-Helmholtz phase of the birth of a neutron star, employing neutrino opacities that are consistently calculated with the underlying equation of state (EOS). Expressions for the diffusion coefficients appropriate for general relativistic neutrino transport in the equilibrium diffusion ...
Pons, J. A. +4 more
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The Evolution of Massive Stars [PDF]
Symposium - International Astronomical Union, 1997 Massive stars are the crossroads of many important astrophysical problems and thus a proper understanding of their evolution is very needed. They are the main sources of UV radiation, by heating the interstellar dust they produce the far-IR luminosities of galaxies.
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Interactive science, 2020 In the article, the authors’ concept is presented, according to which all planets rotate about their axis due to their satellites. The planet and its satellite are interconnected by a shared gravity, which moves along the surface of the planet as the result of the satellite moving in an orbit.
Lev Borisovich Velgas +1 more
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The Evolution of Rotating Stars
Annual Review of Astronomy and Astrophysics, 2000 ▪ Abstract In this article we first review the main physical effects to be considered in the building of evolutionary models of rotating stars on the Upper Main-Sequence (MS). The internal rotation law evolves as a result of contraction and expansion, meridional circulation, diffusion processes, and mass loss. In turn, differential rotation and mixing
Maeder, Andre, Meynet, Georges
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The evolution of star clusters: the resolved-star approach
Astrophysics and Space Science, 2009 We present the first results of a new technique to detect, locate, and characterize young dissolving star clusters. Using HST/ACS archival images of the nearby galaxy IC2574, we performed stellar PSF photometry and selected the most massive stars as our first test sample.
Pellerin, A +3 more
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Schema Evolution in the STAR Framework [PDF]
, 1995 The STAR data model supports the definition of object schemata, according either to some design methodology or to the designer’s decision. Object schemata allow a flexible management of the various representations that are created during the design of a particular object.
Fornari, Miguel Rodrigues +2 more
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Evolution of ultra-massive stars [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractWe discuss the evolution of ultra-massive stars.
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