Comments on Charges and Near-Horizon Data of Black Rings
arXiv:0704.1819 · doi:10.1088/1126-6708/2007/12/057
Abstract
We study how the charges of the black rings measured at the asymptotic infinity are encoded in the near-horizon metric and gauge potentials, independent of the detailed structure of the connecting region. Our analysis clarifies how different sets of four-dimensional charges can be assigned to a single five-dimensional object under the Kaluza-Klein reduction. Possible choices are related by the Witten effect on dyons and by the large gauge transformation in four and five dimensions, respectively.
30 pages, 1 figure; v2: additional references; v3: published version