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    High-precision Atomic Physics Laboratories in Space: White Dwarfs and Subdwarfs

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    Date
    2018-07
    Author
    Landstorfer, A.
    Löbling, L.
    Rauch, T.
    Werner, K.
    Quinet, P.
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    Abstract
    Stellar atmospheres are prime laboratories to determine atomic properties of highly ionized species. Reliable opacities are crucial ingredients for the calculation of stellar atmospheres of white dwarfs and subdwarfs. A detailed investigation on the precision of many iron-group oscillator strengths is still outstanding. To make progress, we used the Hubble Space Telescope Imaging Spectrograph to measure high-resolution spectra of three hot subdwarfs that exhibit extremely high iron-group abundances. The predicted relative strengths of the identified lines are compared with the observations to judge the quality of Kurucz’s line data and to determine correction factors for abundance determinations of the respective elements.
    Department
    Astronomy
    Description
    The 21st European Workshop on White Dwarfs was held in Austin, TX from July 23rd to 27th of 2018
    Subject
    white dwarfs
    subdwarfs
    stellar atmospheres
    URI
    https://hdl.handle.net/2152/73106
    http://dx.doi.org/10.26153/tsw/258
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