Dynamical D4-D8 and D3-D7 branes in supergravity

Abstract : We present a class of dynamical solutions for intersecting D4-D8 and D3-D7 brane systems in ten-dimensional type IIA and IIB supergravity. We discuss if these solutions can be recovered in lower-dimensional effective theories for the warped compactification of a general p-brane system. It is found that an effective p+1-dimensional description is not possible in general due to the entanglement of the transverse coordinates and the p+1-dimensional coordinates in the metric components. For the D4-D8 brane system, the dynamical solutions reduces to a static warped AdS6×S4 geometry in a certain spacetime region. For the D3-D7 brane system, we find a dynamical solution whose metric form is similar to that of a D3-brane solution. The main difference is the existence of a nontrivial dilaton configuration in the D3-D7 solution. Then we discuss cosmology of these solutions. We find that they behave like a Kasner-type cosmological solution at τ→∞, while it reduces to a warped static solution at τ→0, where τ is the cosmic time.


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Contributor : Lantz Simone <>
Submitted on : Friday, January 4, 2008 - 1:00:48 PM
Last modification on : Friday, January 4, 2008 - 1:00:48 PM

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P. Binétruy, M. Sasaki, K. Uzawa. Dynamical D4-D8 and D3-D7 branes in supergravity. Physical Review D, American Physical Society, 2009, 80, pp.026001. <10.1103/PhysRevD.80.026001>. <in2p3-00202152>

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