Mhd Solutions For Proto-Planetary Nebulae
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876446287031697408 |
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| author | José Alberto López |
| author_facet | José Alberto López |
| contents | Mhd Solutions For Proto-Planetary Nebulae José Alberto López José Franco Guillermo García Segura Física, Astronomía y Matemáticas AGB Post Stars: AGB ISM: Bubbles Stars: Mass Loss This paper provides solutions for the origin of post-AGB winds, their acceleration up to high speed, and the subsequent formation of extremely collimated proto-planetary nebulae. Several wind models with terminal velocities from a few tens of km s��1 up to 103 km s-1 are calculated, which produce proto-planetary nebulae with linear momentum in the range 1036 -1040 g cm s-1 and with kinetic energies in the range 1042 -1047 erg. These results match available observations of proto-planetary nebulae. In the present simplistic scheme, the driver of the wind is just the magnetic pressure at the stellar surface. Other forces are not taken into account in this study, except gravity. We conclude that mass-loss rates of post-AGB stars and transition times from late AGB up to planetary nebula central stars could be directly linked with the production of magnetic field at the stellar core. As an example, mass-loss rates as large as 8 x 10-5 M๏ yr-1 and transition times as short as 5,000 years are predicted. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101809 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.18 |
| format | Artículo científico |
| id | redalyc_57101809 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Mhd Solutions For Proto-Planetary Nebulae José Alberto López Física, Astronomía y Matemáticas AGB Post Stars: AGB ISM: Bubbles Stars: Mass Loss Mhd Solutions For Proto-Planetary Nebulae José Alberto López José Franco Guillermo García Segura Física, Astronomía y Matemáticas AGB Post Stars: AGB ISM: Bubbles Stars: Mass Loss This paper provides solutions for the origin of post-AGB winds, their acceleration up to high speed, and the subsequent formation of extremely collimated proto-planetary nebulae. Several wind models with terminal velocities from a few tens of km s��1 up to 103 km s-1 are calculated, which produce proto-planetary nebulae with linear momentum in the range 1036 -1040 g cm s-1 and with kinetic energies in the range 1042 -1047 erg. These results match available observations of proto-planetary nebulae. In the present simplistic scheme, the driver of the wind is just the magnetic pressure at the stellar surface. Other forces are not taken into account in this study, except gravity. We conclude that mass-loss rates of post-AGB stars and transition times from late AGB up to planetary nebula central stars could be directly linked with the production of magnetic field at the stellar core. As an example, mass-loss rates as large as 8 x 10-5 M๏ yr-1 and transition times as short as 5,000 years are predicted. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101809 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.18 |
| title | Mhd Solutions For Proto-Planetary Nebulae |
| topic | Física, Astronomía y Matemáticas AGB Post Stars: AGB ISM: Bubbles Stars: Mass Loss |
| url | https://www.redalyc.org/articulo.oa?id=57101809 |