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The mechanism of the light variability of chemically peculiar stars

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00040495" target="_blank" >RIV/00216224:14310/10:00040495 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The mechanism of the light variability of chemically peculiar stars

  • Original language description

    Until recently, the mechanism of the light variability of chemically peculiar (CP) stars was unclear. To improve this situation, we started a theoretical and observational campaign aimed at the nature of the light variability of these stars. We use the TLUSTY model atmospheres calculated for the appropriate surface chemical composition to obtain the emergent flux and to predict the rotationally modulated light curves. We show on example of several well-studied CP stars that their light variations can beexplained as a result of i) the uneven surface distribution of the elements (creating overabundant regions), ii) the flux redistribution from the ultraviolet to the visible part of the spectrum (in the overabundant regions), and iii) rotation of the star. We show that the silicon and helium bound-free transitions and iron bound-bound transitions provide the main contribution to the flux redistribution. This result is also a very precise test of modern stellar model atmospheres.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    BN - Astronomy and celestial mechanics, astrophysics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/IAA301630901" target="_blank" >IAA301630901: Spectral energy distribution of hot stars and its variability</a><br>

  • Continuities

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

Others

  • Publication year

    2010

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    Solar and Stellar Variability: Impact on Earth and Planets, IAUS 264

  • ISBN

    978-0-521-76499-5

  • ISSN

  • e-ISSN

  • Number of pages

    3

  • Pages from-to

  • Publisher name

    Cambridge University Press

  • Place of publication

    Cambridge

  • Event location

    Rio de Janeiro

  • Event date

    Jan 1, 2009

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article

    000280547700045