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    On the interpretation and applicability of κ -distributions

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    Authors
    Lazar, M.
    Fichtner, H.
    Yoon, P.H.
    Discipline
    Physical sciences
    Subject
    Astronomy
    Astrophysics
    Solar wind
    Stability
    Kappa distribution
    Physical interpretation
    Physical systems
    Quantitative comparison
    Space plasma physics
    Thermal velocity
    Plasma diagnostics
    Audience
    Scientific
    Date
    2016
    Publisher
    Article
    Metadata
    Show full item record
    Description
    Context. The generally accepted representation of κ-distributions in space plasma physics allows for two different alternatives, namely assuming either the temperature or the thermal velocity to be κ-independent. Aims. The present paper aims to clarify the issue concerning which of the two possible choices and the related physical interpretation is correct. Methods. A quantitative comparison of the consequences of the use of both distributions for specific physical systems leads to their correct interpretation. Results. It is found that both alternatives can be realized, but they are valid for principally different physical systems. Conclusions. The investigation demonstrates that, before employing one of the two alternatives, one should be conscious about the nature of the physical system one intends to describe, otherwise one would possibly obtain unphysical results. © ESO, 2016.
    Citation
    Lazar, M.; Fichtner, H.; Yoon, P.H. (2016). On the interpretation and applicability of κ -distributions. , Astronomy and Astrophysics, Vol. 589, A49, Article, DOI: 10.1051/0004-6361/201527593.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/3994
    doi: http://dx.doi.org/10.1051/0004-6361/201527593
    scopus: 2-s2.0-84964786336
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

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