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The Atmosphere of Subluminous B Stars
Symposium - International Astronomical Union, 19848 sdB stars have been analyzed for effective temperatures, gravity and helium content by means of LTE and NLTE model atmospheres (Heber et al., 1983). The analyses are based on the following observations: 1.)B&C IDS spectrograms obtained with ESO's 3.6m and 1.5m telescopes (4250–4800å at 29 å/mm, or, 4000–5000å at 59 å/mm).2.)IUE spectra in low ...
U. Heber +3 more
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2006
Properties of the thermal radiation emitted by neutron stars (NSs) are determined by thin plasma layers (atmospheres) at their surfaces. The NS atmospheres are very different from those of usual stars due to the immense gravity and huge magnetic fields. Current models of hydrogen NS atmospheres show that the spectra deviate substantially from blackbody
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Properties of the thermal radiation emitted by neutron stars (NSs) are determined by thin plasma layers (atmospheres) at their surfaces. The NS atmospheres are very different from those of usual stars due to the immense gravity and huge magnetic fields. Current models of hydrogen NS atmospheres show that the spectra deviate substantially from blackbody
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Stars with expanding atmospheres
Vistas in Astronomy, 1956Abstract Most stars are stabilized spheres whose outer strata are nearly quiescent. Those exceptional objects in whose atmospheres outward motions have been observed may be placed in three groups: pulsating stars, stars with occasional outbursts, and stars with a continual outflow of atoms.
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Nucleosynthesis in neutron star atmospheres
Astrophysics and Space Science, 1969The composition of neutron star atmospheres is calculated as a function of time including effects of diffusion, cooling and thermonuclear reactions. A seven-component nuclear reaction network with includes He4, C12, O16, Ne20, Mg24, Si28 and Fe56 is utilized.
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Magnetized atoms in star atmospheres
AIP Conference Proceedings, 2000Magnetic white dwarfs possess strong magnetic fields which can vary in the wide range 100 T–105T. Atoms and molecules of their atmospheres which are exposed to such extreme fields severely change their electronic structure and properties. In order to understand the observed spectra of magnetic cosmic objects it is indispensable to perform detailed ...
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Hydrodynamical Model Atmospheres of Metal‐Poor Stars
AIP Conference Proceedings, 2008Standard one‐dimensional (1D) model atmospheres rely on the assumption of radiative equilibrium in the non‐convective part of the stellar photosphere. However, gas‐dynamical effects can lead to dramatic deviations from radiative equilibrium conditions, especially in metal‐poor stellar atmospheres.
Ludwig, Hans-Günter +4 more
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Model Atmospheres for Cool Stars
1974This report contains an extensive series of model atmospheres for cool stars having a wide range in chemical composition. Model atmospheres (temperature, pressure, density, etc.) in the range 5000 K> eff > 2000 K and 4.0 > log g > -2.0 are tabulated, along with emergent energy flux distributions, limb darkening, and information on ...
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
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