منابع مشابه
Accreting neutron stars, black holes, and degenerate dwarf stars.
During the past 8 years, extended temporal and broadband spectroscopic studies carried out by x-ray astronomical satellites have led to the identification of specific compact x-ray sources as accreting neutron stars, black holes, and degenerate dwarf stars in close binary systems. Such sources provide a unique opportunity to study matter under extreme conditions not accessible in the terrestria...
متن کاملThe Gravitational Demise of Cold Degenerate Stars
We consider the long term fate and evolution of cold degenerate stars under the action of gravity alone. Although such stars cannot emit radiation through the Hawking mechanism, the wave function of the star will contain a small admixture of black hole states. These black hole states will emit radiation and hence the star can lose its mass energy in the long term. We discuss the allowed range o...
متن کاملDegenerate Thermal Pulses in AGB Stars
We report on the discovery of a new kind of thermal pulse in intermediate mass AGB stars. Deep dredge-up during normal thermal pulses on the AGB leads to the formation of a long, unburnt tail to the helium profile. Eventually the tail ignites under partially degenerate conditions producing a strong shell flash with very deep subsequent dredge-up. The carbon content of the intershell convective ...
متن کاملmagnetized degenerate stars cooling by axion emission ?
We considered recently as a new axion production mechanism the process e − → e − +a in a strong magnetic field B. Requiring that for a strongly magnetized neutron star the axion luminosity is smaller than the neutrino luminosity we obtained the bound g ae < ∼ 10 −10 for the axion electron coupling constant. This limit is considerably weaker than the bound derived earlier by Borisov and Grishina...
متن کاملMagnetic fields of non-degenerate stars
Magnetic fields are present in a wide variety of stars throughout the HR diagram and play a role at basically all evolutionary stages, from very-low-mass dwarfs to very massive stars, and from young star-forming molecular clouds and protostellar accretion discs to evolved giants/supergiants and magnetic white dwarfs/neutron stars. These fields range from a few μ G (e.g., in molecular clouds) to...
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ژورنال
عنوان ژورنال: Science
سال: 1964
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.143.3608.865