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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2003
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=57115039 |
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- Recent Advances in the Collapse and Fragmentation of Turbulent Molecular Cloud Cores R. T. Fisher M. R. Krumholz R. I. Klein C. F. McKee Física, Astronomía y Matemáticas TURBULENCE ISM: CLOUDS HYDRODYNAMICS STARS: LOW MASS STARS: FORMATION Observations of stars in the vicinity of the Sun show that binary systems are prevalent and appear to be ageneral outcome of the star-formation process. One of the major goals of this research is to understand thenature of the formation of binary and multiple stellar systems with typical low-mass stars (0:2 to 3 M) andthe physical properties of these systems. Basic questions concerning this process remain unanswered. Whatdetermines the fraction of an unstable cloud that will fragment into protostellar objects? What determines thepattern of stellar clustering into binaries and multiple systems? Even after fragmentation occurs, we have littleunderstanding of the subsequent collapse. Consequently, it is unclear how the mass distribution of fragmentsmaps onto eventual stellar masses, something we must understand to explain the stellar initial mass function.We will rst discuss the development of the numerical methodology that will contribute to answeringthese questions. This technology consists of a 3-D parallel, adaptive mesh renement (AMR) self-gravitational,radiation-hydrodynamics code that we have developed. We will present new results for the gravitational collapseand fragmentation of marginally stable turbulent molecular cloud cores and follow the collapse of high-massfragments as they interact with the radiation of the protostars forming at their centers. We will discuss thetheoretical diculties in forming binary stars and the role of turbulence in their formation. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57115039 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.15