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Hot star wind mass-loss rate predictions at low metallicity

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00522767" target="_blank" >RIV/67985815:_____/19:00522767 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216224:14310/19:00108271

  • Result on the web

    <a href="http://dx.doi.org/10.1017/S1743921318005331" target="_blank" >http://dx.doi.org/10.1017/S1743921318005331</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1017/S1743921318005331" target="_blank" >10.1017/S1743921318005331</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hot star wind mass-loss rate predictions at low metallicity

  • Original language description

    Hot star winds are driven by the radiative force due to light absorption in lines of heavier elements. Therefore, the amount of mass lost by the star per unit of time, i.e., the mass-loss rate, is sensitive to metallicity. We provide mass-loss rate predictions for O stars with mass fraction of heavier elements 0.2 <Z/Z☉ <= 1. Our predictions are based on global model atmospheres. The models allow us to predict wind terminal velocity and the mass-loss rate just from basic global stellar parameters. We provide a formula that fits the mass-loss rate predicted by our models as a function of stellar luminosity and metallicity. On average, the mass-loss rate scales with metallicity as (Z/Z☉)0.59. The predicted mass-loss rates agree with mass-loss rates derived from ultraviolet wind line profiles. At low metallicity, the rotational mixing affects the wind mass-loss rates. We study the influence of magnetic line blanketing.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

    <a href="/en/project/GA18-05665S" target="_blank" >GA18-05665S: Mass-loss in evolved massive stars</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Dwarf Galaxies: From the Deep Universe to the Present

  • ISBN

    9781108471619

  • ISSN

    1743-9213

  • e-ISSN

  • Number of pages

    3

  • Pages from-to

    208-210

  • Publisher name

    Cambridge Univeristy Press

  • Place of publication

    Cambridge

  • Event location

    Vienna

  • Event date

    Aug 20, 2018

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article