Superstars and Giant Gravitons

TL;DR

This paper studies BPS solutions in type IIb supergravity that resemble giant gravitons, revealing their physical interpretation and momentum distribution through detailed calculations of the Ramond-Ramond five-form.

Contribution

It provides a new understanding of BPS solutions as giant gravitons and calculates their distribution from supergravity fields, linking geometry to brane dynamics.

Findings

Naked singularity interpreted as giant gravitons

Distribution of giant gravitons derived from dipole field

Entire internal momentum explained by giant graviton sources

Abstract

We examine a family of BPS solutions of ten-dimensional type IIb supergravity. These solutions asymptotically approach AdS_5 X S^5 and carry internal `angular' momentum on the five-sphere. While a naked singularity appears at the center of the anti-de Sitter space, we show that it has a natural physical interpretation in terms of a collection of giant gravitons. We calculate the distribution of giant gravitons from the dipole field induced in the Ramond-Ramond five-form, and show that these sources account for the entire internal momentum carried by the BPS solutions.