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Hot star wind models with new solar abundances

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F07%3A00020178" target="_blank" >RIV/00216224:14310/07:00020178 - isvavai.cz</a>

  • Alternative codes found

    RIV/67985815:_____/07:00092398

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hot star wind models with new solar abundances

  • Original language description

    We compare the hot-star wind models calculated by assuming older solar-abundance determination with models calculated using the recently published values derived from 3D hydrodynamical model atmospheres. We show that the use of new abundances with lowermetallicity improves the agreement between wind observation and theory in several aspects. (1) The predicted wind mass-loss rates are lower by a factor of 0.76. This leads to better agreement with mass-loss rates derived from observational analysis thattakes the clumping into account. (2) As a result of the lowering of mass-loss rates, there is better agreement between the predicted modified wind momentum-luminosity relationship and that derived from observational analysis that takes the clumping intoaccount. (3) Both the lower mass fraction of heavier elements and lower mass-loss rates lead to a decrease in opacity in the X-ray region. This influences the prediction of the X-ray line profile shapes. (4) There is better agreement betw

  • Czech name

    Modely hvězdných větrů horkých hvězd s novým slunečním chemickým složením

  • Czech description

    Porovnáváme modely hvězdných větrů horkých hvězd spočtené pomocí staršího určení chemického složení Slunce a nového určení chemického složení pomocí 3D hydrodynamických modelů atmosféry. Ukazujeme, že použití nového chemického složení s menším obsahem těžších prvků vylepšuje soulad mezi pozorováním a teorií v několika ohledech.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BN - Astronomy and celestial mechanics, astrophysics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA205%2F04%2F1267" target="_blank" >GA205/04/1267: Circumstellar envelopes of hot stars</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2007

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Astronomy and Astrophysics

  • ISSN

    0004-6361

  • e-ISSN

  • Volume of the periodical

    2007

  • Issue of the periodical within the volume

    464

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    4

  • Pages from-to

    "L17"-"L20"

  • UT code for WoS article

  • EID of the result in the Scopus database