Issue
EPL
Volume 80, Number 2, October 2007
Article Number 20004
Number of page(s) 3
Section General
DOI http://dx.doi.org/10.1209/0295-5075/80/20004
Published online 21 September 2007
EPL, 80 (2007) 20004
DOI: 10.1209/0295-5075/80/20004

Comments on thermal aspects of the Bonnor-type black dihole in the Brans-Dicke paradigm

H. Fujisaki

Department of Physics, Rikkyo University - Tokyo 171-8501, Japan


received 13 June 2007; accepted in final form 31 August 2007; published October 2007
published online 21 September 2007

Abstract
Thermal aspects of the Brans-Dicke analog of the Bonnor-type black dihole are commentarially described on the basis of a magnetic-dipole solution of Kim and Lee in the Brans-Dicke-Maxwell theory. It is then exemplified that the so-called area theorem of the horizon is broken and the entropy is divergent, irrespective of the finite area of the horizon.

PACS
04.50.+h - Gravity in more than four dimensions, Kaluza-Klein theory, unified field theories; alternative theories of gravity.
04.60.-m - Quantum gravity.
04.70.Dy - Quantum aspects of black holes, evaporation, thermodynamics.

© Europhysics Letters Association 2007