Quasinormal modes for the Vaidya metric
Élcio AbdallaInstituto de Física, Universidade de São Paulo, C.P. 66318, 05315-970—São Paulo, SP, BrazilCecilia ChirentiInstituto de Física, Universidade de São Paulo, C.P. 66318, 05315-970—São Paulo, SP, BrazilAlberto SaaInstituto de Física, Universidade de São Paulo, C.P. 66318, 05315-970—São Paulo, SP, Brazil
2006en
ABI
Abstract
We consider here scalar and electromagnetic perturbations for the Vaidya metric in double-null coordinates. Such an approach allows one to go a step further in the analysis of quasinormal modes for time-dependent spacetimes. Some recent results are refined, and a new nonstationary behavior corresponding to some sort of inertia for quasinormal modes is identified. Our conclusions can enlighten some aspects of the wave scattering by black holes undergoing some mass accretion processes.
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