منابع مشابه
Pulsating Stellar Atmospheres
We review the basic concepts, present state of theoretical models, and the future prospects for theory and observations of pulsating stellar atmospheres. Our emphasis is on radially pulsating cool stars, which dynamic atmospheres provide a general example for the differences with standard static model atmospheres.
متن کاملResolving the third dimension in peculiar pulsating stellar atmospheres
Aims. We present detailed analysis of the vertical pulsation mode cross-section in ten rapidly oscillating Ap (roAp) stars based on spectroscopic time-series observations. The aim of this analysis is to derive from observations a complete picture of how the amplitude and phase of magnetoacoustic waves depend on depth. Methods. We use the unique properties of roAp stars, in particular chemical s...
متن کاملStellar Fluxes as Probes of Convection in Stellar Atmospheres
Convection and turbulence in stellar atmospheres have a significant effect on the emergent flux from late-type stars. The theoretical advancements in convection modelling over recent years have proved challenging for the observers to obtain measurements with sufficient precision and accuracy to allow discrimination between the various predictions. An overview of the current observational techni...
متن کاملX-ray irradiated model stellar atmospheres
We present equations and details of the computer code for precise calculation of LTE model atmospheres which are illuminated by an external radiation field. Both radiative and hydrostatic equilibrium, and coherent Thomson electron scattering have been assumed. Radiation field at each frequency and depth level is computed with the method of variable Eddington factors. The code is fully suitable ...
متن کاملStellar model atmospheres with magnetic line blanketing
Model atmospheres of A and B stars are computed taking into account magnetic line blanketing. These calculations are based on the new stellar model atmosphere code LLM which implements direct treatment of the opacities due to the bound-bound transitions and ensures an accurate and detailed description of the line absorption. The anomalous Zeeman effect was calculated for the field strength...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1997
ISSN: 0074-1809
DOI: 10.1017/s0074180900116766