The importance of radiative transfer in stellar pulsation models [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- Pages: (4 pages) : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- With the advent of the new astrophysical opacities it seems appropriate to discuss the need for a full radiative transfer (RT) theory instead of the usual equilibrium diffusion theory used in most nonlinear pulsation codes. Early studies on the importance of RT in the calculation of light curves for Cepheid models showed little effect over diffusion theory. The new opacities though may help to explain the bump'' mass discrepancy problem. For RR Lyrae models the use of RT theory causes some effects both in the color differences (U-B) as well as the light curves. New opacities help to explain the period ratios for double mode RR Lyrae and beat Cepheids. A new area of research is in the modeling of stars with high luminosity to mass ratios that show tendencies for doubling and transitions to chaos, such as W Virginis and RV Tauri stars. For these stars it has been shown the RT is necessary in calculating their light curves and that the understanding of the shock dynamics depends on the transfer of lines in the pulsating RT dependent atmospheres.
- Report Numbers:
- E 1.99:la-ur-92-308
E 1.99: conf-920184--1
conf-920184--1
la-ur-92-308 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
01/01/1992.
"la-ur-92-308"
" conf-920184--1"
"DE92007566"
International Astronomical Union (IAU) meeting, Mito (Japan), 6-10 Jan 1992.
Davis, C.G. - Funding Information:
- W-7405-ENG-36
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