Počet záznamů: 1  

Validity of Clumping Approximations for Mass-Loss Rates Determination

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    0439737 - ASÚ 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
    Kubát, Jiří - Šurlan, Brankica
    Validity of Clumping Approximations for Mass-Loss Rates Determination.
    Four Decades of Research On Massive Stars. San Francisco: Astronomical Society of the Pacific, 2012 - (Drissen, L.), s. 128-133. ASP Conference Series, 465. ISBN 978-1-58381-812-1.
    [Meeting on 4 Decades of Research on Massive Stars in Honor of Anthony FJ Moffat. Auberge Lac Taureau (CA), 11.07.2011-15.07.2011]
    Institucionální podpora: RVO:67985815
    Klíčová slova: hot-star winds * driven stellar winds * bright ob-stars
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika

    Clumping in stellar winds of hot stars is a possible consequence of radiative-acoustic instability appearing in solutions of radiative-hydrodynamical equations. However, clumping is usually included into stellar atmosphere modeling and radiative transfer calculations in a highly approximate way via a global free parameter called the clumping factor. Using different values of clumping factors, many researchers succeeded to fit the observed spectra better and to correct empirical mass-loss rates. This usually leads to a conclusion that the stellar wind is clumped. To understand how clumping may influence theoretical predictions of mass-loss rates, different clumping properties have to be taken into account. If clumping appears already below the critical point, the mass-loss rate is changed.
    Trvalý link: http://hdl.handle.net/11104/0242950

     
     
Počet záznamů: 1  

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