Analytical Solutions for the Dynamical Clock A+ Indicator in a Toy Model of Pure Dynamical Friction
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2020
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| _version_ | 1876471436925730816 |
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| author | M. Pasquato |
| author_facet | M. Pasquato |
| contents | Analytical Solutions for the Dynamical Clock A+ Indicator in a Toy Model of Pure Dynamical Friction M. Pasquato Física, Astronomía y Matemáticas Blue stragglers methods: analytical globular clusters: general Blue straggler stars are more massive than the average star in globular clusters, as they originate from the merger of two stars. Consequently, they experience dynamical friction, progressively sinking to the cluster center. Recently, several indicators of the degree of dynamical relaxation of a globular cluster have been proposed, based on the observed radial distribution of blue straggler stars. The most successful is the Alessandrini indicator, or A+ for short, which is the integral of the cumulative distribution of the blue straggler stars minus that of a lighter reference population. A+ correlates with the dynamical age of a cluster both in realistic simulations and in observations. Here I calculate the temporal dependence of the A+ indicator analytically in a simplied model of the evolution of the blue straggler star distribution under dynamical friction only. 2020 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57171642001 https://www.redalyc.org/journal/571/57171642001/ https://www.redalyc.org/journal/571/57171642001/html/ https://www.redalyc.org/journal/571/57171642001/57171642001.epub https://www.redalyc.org/journal/571/57171642001/movil 10.22201/ia.01851101p.2020.56.01.01 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) Num.1 Vol.56 |
| format | Artículo científico |
| id | redalyc_57171642001 |
| institution | Redalyc |
| language | en |
| publishDate | 2020 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Analytical Solutions for the Dynamical Clock A+ Indicator in a Toy Model of Pure Dynamical Friction M. Pasquato Física, Astronomía y Matemáticas Blue stragglers methods: analytical globular clusters: general Analytical Solutions for the Dynamical Clock A+ Indicator in a Toy Model of Pure Dynamical Friction M. Pasquato Física, Astronomía y Matemáticas Blue stragglers methods: analytical globular clusters: general Blue straggler stars are more massive than the average star in globular clusters, as they originate from the merger of two stars. Consequently, they experience dynamical friction, progressively sinking to the cluster center. Recently, several indicators of the degree of dynamical relaxation of a globular cluster have been proposed, based on the observed radial distribution of blue straggler stars. The most successful is the Alessandrini indicator, or A+ for short, which is the integral of the cumulative distribution of the blue straggler stars minus that of a lighter reference population. A+ correlates with the dynamical age of a cluster both in realistic simulations and in observations. Here I calculate the temporal dependence of the A+ indicator analytically in a simplied model of the evolution of the blue straggler star distribution under dynamical friction only. 2020 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57171642001 https://www.redalyc.org/journal/571/57171642001/ https://www.redalyc.org/journal/571/57171642001/html/ https://www.redalyc.org/journal/571/57171642001/57171642001.epub https://www.redalyc.org/journal/571/57171642001/movil 10.22201/ia.01851101p.2020.56.01.01 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) Num.1 Vol.56 |
| title | Analytical Solutions for the Dynamical Clock A+ Indicator in a Toy Model of Pure Dynamical Friction |
| topic | Física, Astronomía y Matemáticas Blue stragglers methods: analytical globular clusters: general |
| url | https://www.redalyc.org/articulo.oa?id=57171642001 https://www.redalyc.org/journal/571/57171642001/ https://www.redalyc.org/journal/571/57171642001/html/ https://www.redalyc.org/journal/571/57171642001/57171642001.epub https://www.redalyc.org/journal/571/57171642001/movil |