Measurement of the Kerr spin parameter by observation of a compact object's shadow

Kenta Hioki, Kei Ichi Maeda

研究成果: Article

142 引用 (Scopus)

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A black hole casts a shadow as an optical appearance because of its strong gravitational field. We study how to determine the spin parameter and the inclination angle by observing the apparent shape of the shadow, which is distorted mainly by those two parameters. Defining some observables characterizing the apparent shape (its radius and distortion parameter), we find that the spin parameter and inclination angle of a Kerr black hole can be determined by the observation. This technique is also extended to the case of a Kerr naked singularity.

元の言語English
記事番号024042
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
80
発行部数2
DOI
出版物ステータスPublished - 2009 8 6

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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