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

Kenta Hioki, Keiichi Maeda

研究成果: Article

127 引用 (Scopus)

抄録

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
外部発表Yes

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inclination
naked singularities
gravitational fields
casts
radii

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

これを引用

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