Hydrodynamic Models of Line-Driven Accretion Disk Winds in Cataclysmic Variables
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876433490639060992 |
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| author | Nicolas Antonio Pereyra |
| author_facet | Nicolas Antonio Pereyra |
| contents | Hydrodynamic Models of Line-Driven Accretion Disk Winds in Cataclysmic Variables Nicolas Antonio Pereyra Timothy R. Kallman John M. Blondin Física, Astronomía y Matemáticas We developed several alpha-disk models for line-driven winds from cataclysmi c variables. Using 1-D analytic models we explore the conditions necessary for th e existence of a wind, and the dependence of speed and mass-loss with radius. Using a 2-D isothermal model we explore the effects of centrifugal forces, showing that they cause stream lines to collide producing enhanced density regions in the wind. Without these effects, the mass-loss rates obtained would be too low to produce the optical depths required to explain P-Cygni profiles, showing the necessity of 2-D models. Using a 2-D adiabatic model we calculate mass-losses, terminal velocities, and C IV line profiles for various angles. For a disk with Lsun around a white dwarf of 0.6 Msun and 0.01 Rsun, we obtain dot Mwind=8 × 10-12 Msun yr-1, and a terminal velocity ~ 3000 km s-1. The profiles obtained are consistent with observations, in particular with the absorption of the blue-shifted component, the velocities implied by absorption components, the width of emission components, and the strong dependence with inclination. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101150 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.11 |
| format | Artículo científico |
| id | redalyc_57101150 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Hydrodynamic Models of Line-Driven Accretion Disk Winds in Cataclysmic Variables Nicolas Antonio Pereyra Física, Astronomía y Matemáticas Hydrodynamic Models of Line-Driven Accretion Disk Winds in Cataclysmic Variables Nicolas Antonio Pereyra Timothy R. Kallman John M. Blondin Física, Astronomía y Matemáticas We developed several alpha-disk models for line-driven winds from cataclysmi c variables. Using 1-D analytic models we explore the conditions necessary for th e existence of a wind, and the dependence of speed and mass-loss with radius. Using a 2-D isothermal model we explore the effects of centrifugal forces, showing that they cause stream lines to collide producing enhanced density regions in the wind. Without these effects, the mass-loss rates obtained would be too low to produce the optical depths required to explain P-Cygni profiles, showing the necessity of 2-D models. Using a 2-D adiabatic model we calculate mass-losses, terminal velocities, and C IV line profiles for various angles. For a disk with Lsun around a white dwarf of 0.6 Msun and 0.01 Rsun, we obtain dot Mwind=8 × 10-12 Msun yr-1, and a terminal velocity ~ 3000 km s-1. The profiles obtained are consistent with observations, in particular with the absorption of the blue-shifted component, the velocities implied by absorption components, the width of emission components, and the strong dependence with inclination. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101150 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.11 |
| title | Hydrodynamic Models of Line-Driven Accretion Disk Winds in Cataclysmic Variables |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=57101150 |