Results 71 to 80 of about 17,712 (190)
Evolution of a Long-lived Deep-seated Main-sequence Magnetic Field during White Dwarf Cooling
The Astrophysical JournalWe study the evolution of white dwarf (WD) magnetic fields that originate from convective-core dynamos during the main sequence. Using stellar evolution and WD cooling models combined with magnetic field diffusion calculations, we demonstrate that a ...
Matias Castro-Tapia +2 more
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Electron Capture in Stellar Interiors.
The Astrophysical Journal, 1964 The reasons why nuclear electron-capture rates in stars depend on temperature and density are discussed, and some astrophysical applications of continuum electron-capture rates are reviewed. The modern theory of nuclear BETA decay is then used to calculate stellar-continuum electroncapture rates for transitions of an arbitrary degree of forbiddenness ...
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Energy generation mechanisms in stellar interiors
, 2012 It is well known that in the calculation of thermonuclear reaction rates in dense and cool plasma, the screening effects must be taken into account. The internal structure and evolution of stars can be obtained with the calculations of equation of state of gas structure, opacity and thermonuclear reaction rates.
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Constraints on stellar interior physics from helioseismology [PDF]
Symposium - International Astronomical Union, 1997 Traditional observations of the properties of stars generally provide tests of only the gross aspects of stellar structure and evolution. The limitation lies in the amount and precision of the available data of relevance to the structure of the stellar interior, i.e., the determination of stellar effective temperatures, surface composition ...
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Physical mechanisms of mixing in stellar interiors [PDF]
Symposium - International Astronomical Union, 1984 The different mechanisms by which mixing can take place in stellar interiors are considered : the classical Rayleigh-Benard instability with penetrative convection and over-shooting, semi-convection, gravitationnal and radiative settling, turbulent mixing.
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A Short Intense Dynamo at the Onset of Crystallization in White Dwarfs
The Astrophysical Journal LettersThe origin of large magnetic fields (≳10 ^6 G) in isolated white dwarfs is not clear. One possible explanation is that crystallization of the star’s core drives compositional convection, which when combined with the star’s rotation, can drive a dynamo ...
J. R. Fuentes +2 more
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Magnetic Webs in Stellar Radiative Zones
The Astrophysical Journal LettersRotational evolution of stellar radiative zones is an old puzzle. We argue that angular momentum transport by turbulent processes induced by differential rotation is insufficient, and propose that a key role is played by “magnetic webs.” We define ...
Valentin A. Skoutnev +1 more
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The Physics of Stellar Interiors
, 2022 These are the slides for a seminar talk that I gave on August 9, 2022 as part of the Space Science and Security Summer Seminar Series at Lawrence Livermore National Laboratory. The talk gives an overview of some aspects of stellar hydrodynamics, and describes how realistic hydrodynamic simulations are used to improve stellar structure and evolution ...
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European Physical Journal C: Particles and FieldsWe explore the structure and dynamics of compact stellar structures by assuming anisotropic fluid solutions within the framework of general relativity.
M. Ilyas +3 more
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The galactic globular cluster M5 (NGC 5904) as a particle physics laboratory
EPJ Web of Conferences, 2013 Globular clusters have been used for a long time to test stellar evolution theories, and in particular to constrain novel forms of energy loss in low-mass stars.
Redondo J. +4 more
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