Bonn 2020 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Black Holes 2

GR 9.7: Talk

Wednesday, April 1, 2020, 15:30–15:45, H-HS IX

Quasinormal modes of dilatonic Reissner-Nordström black holes — Jose Luis Blázquez-Salcedo, •Sarah Kahlen, and Jutta Kunz — Carl von Ossietzky Universität, Oldenburg, Germany

Some numerically obtained quasinormal modes of static spherically symmetric dilatonic Reissner-Nordström black holes for general values of the electric charge and of the dilaton coupling constant are presented. The spectrum of quasinormal modes is composed of five families of modes: polar and axial gravitational-led modes, polar and axial electromagnetic-led modes, and polar scalar-led modes. A quantitative analysis of the spectrum reveals its dependence on the electric charge and on the dilaton coupling constant. For large electric charge and large dilaton coupling, strong deviations from the Reissner-Nordström modes arise. In particular, isospectrality is strongly broken for large values of the charge, both for the electromagnetic-led and the gravitational-led modes.