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• W4286298891 abstract "The observed distributions of stellar parameters, in particular, rotational and radial velocities, often depart from the Maxwellian (Gaussian) distribution. In the absence of a consistent statistical framework, these distributions are, in general, accounted for phenomenologically by employing power-law distributions, such as Tsallis or Kaniadakis distributions. Here we argue that the observed distributions correspond to locally Gaussian distributions, whose characteristic width is regarded as a statistical variable, in accordance with common knowledge that this parameter is mass dependent. The distributions arising within this picture correspond to superstatistics-a formalism emerging naturally in the context of self-gravitating media. We discuss in detail the distributions arising within this formalism and confront them with observational data of open clusters. We compute their moments and show that the Chandrasekhar-Münch relation remains invariant in this scenario. We also address the effect of these distributions on the thermalization of a massive body, e.g., a supermassive black hole, immersed in a stellar gas. We further discuss how the superstatistical picture clarifies certain ambiguities while offering a whole family of distributions (of which asymptotic power laws represent a special case), opening possibilities for fitting observational data." @default.
• W4286298891 created "2022-07-21" @default.
• W4286298891 creator A5057095522 @default.
• W4286298891 date "2022-06-08" @default.
• W4286298891 modified "2023-09-29" @default.
• W4286298891 title "Generalized statistical mechanics of stellar systems" @default.
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• W4286298891 doi "https://doi.org/10.1103/physreve.105.064108" @default.
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• W4286298891 hasPublicationYear "2022" @default.
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