Talk detail

Participant	Uchikata, Nami
Institution	Astronomical Institute, Tohoku University - Aramaki-Aoba 6-3, Aoba-ku - Sendai - Miyagi - Japan

Session	AT3	Accepted		Order	Time
Talk	Oral abstract	Title	New solutions of charged regular black holes and their stability
Co-authors
Abstract	We construct new regular black hole solutions composed of a single de Sitter core whose surface boundary is a timelike charged massive thin shell. The geometry outside the shell is described by the Reissner-Nordstrom solution containing the event and the Cauchy horizons. The thin shell is assumed to have no pressure and to be inside the Cauchy horizon. We investigate the stability of the new regular black hole against radial perturbations. It is found that nearly extremal black holes characterized by 0.87L < m < 1.99L are stable, where m is the black hole mass, and L the de Sitter horizon radius. For 1.3 L < m, some solutions are unstable.