研究者業績

伊形 尚久

イガタ タカヒサ  (Takahisa Igata)

基本情報

所属
学習院大学 理学部 物理学科 助教
学位
博士(理学)(2012年3月 大阪市立大学 大学院理学研究科)

研究者番号
40711487
ORCID ID
 https://orcid.org/0000-0002-3344-9045
J-GLOBAL ID
201801018312811299
researchmap会員ID
B000325603

論文

 52
  • Takahisa Igata
    2010年3月3日  
    We report on our progress in research of separability of the Nambu-Goto equation for test strings with a symmetric configuration in a shape of toroidal spiral in a five-dimensional Kerr-AdS black hole. In particular, for a Hopf loop string which is a special class of the toroidal spirals, we show the complete separation of variables occurs in two cases, Kerr background and Kerr-AdS background with equal angular momenta. We also obtain the dynamical solution for the Hopf loop around a black hole and for the general toroidal spiral in Minkowski background.
  • Igata, T., Ishihara, H.
    Physical Review D - Particles, Fields, Gravitation and Cosmology 81(4) 2010年2月12日  査読有り

MISC

 3
  • 木下 俊一郎, 伊形 尚久
    日本物理学会誌 74(8) 542-547 2019年8月  査読有り招待有り
  • Takahisa Igata, Hideki Ishihara, Yohsuke Takamori
    The Thirteenth Marcel Grossmann Meeting 2015年3月  査読有り
    We show that there exist chaotic bound orbits of a particle around a singly rotating black ring in five-dimensions by using Poincaré map.
  • Takahisa Igata, Hideki Ishihara, Yohsuke Takamori
    Journal of Physics: Conference Series 314 012113-012113 2011年9月22日  査読有り
    We study stable bound orbits of a free particle around a black ring. Unlike the higher-dimensional black hole case, we find that there exist stable bound orbits in toroidal spiral shape near the ring axis and stable circular orbits on the axis. In addition, radii of stable bound orbits can be infinitely large if the ring thickness is less than a critical value.

教育業績(担当経験のある科目)

 13

所属学協会

 6

共同研究・競争的資金等の研究課題

 8