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    Silhouette and spectral line profiles in the special modification of the Kerr black hole geometry generated by quintessential fields

    Zdeněk Stuchlík · Červen 01, 2016 · Fyzika · 0 comments
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    Publication date: Jun 2016

    Abstract:
    We study optical effects in quintessential Kerr black hole spacetimes
    corresponding to the limiting case of the equation-of-state parameter
    $omega_{q}=-1/3$ of the quintessence. In dependence on the
    dimensionless quintessential field parameter $c$, we determine the black
    hole silhouette and the spectral line profiles of Keplerian disks
    generated in this special quintessential Kerr geometry, representing an
    extension of the general modifications of the Kerr geometry introduced
    recently by Ghasemi-Nodehi and Bambi cite{Gha-Bam:2016:EPJC:}. We
    demonstrate that due to the influence of the parameter $c$, the
    silhouette is almost homogeneously enlarged, and the spectral line
    profiles are redshifted with almost conserved shape.

    Authors:
    Schee, Jan; Stuchlik, Zdenek;

    http://adsabs.harvard.edu/abs/2016arXiv160609037S

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