Black holes in models with dilaton field and electric or electric and magnetic charges

Kyriakopoulos, E

dc.contributor.author	Kyriakopoulos, E	en
dc.date.accessioned	2014-03-01T01:23:40Z
dc.date.available	2014-03-01T01:23:40Z
dc.date.issued	2006	en
dc.identifier.issn	0264-9381	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17079
dc.subject	Electromagnetic Field	en
dc.subject	Satisfiability	en
dc.subject	Black Hole	en
dc.subject	Strong Energy Condition	en
dc.subject.classification	Astronomy & Astrophysics	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	BARYON NUMBER	en
dc.subject.other	HAIR	en
dc.subject.other	NONEXISTENCE	en
dc.subject.other	SOLITONS	en
dc.title	Black holes in models with dilaton field and electric or electric and magnetic charges	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0264-9381/23/24/027	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0264-9381/23/24/027	en
heal.identifier.secondary	027	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Exact static spherically symmetric charged black holes in four dimensions are presented. One of them has only electric charge and another electric and magnetic charges. In these solutions the metric is asymptotically flat, has two horizons, irremovable singularity only at r = 0, and the dilaton field is singular only at r = 0. The solution with electric charge only is characterized by three free parameters, the ADM mass, the electric charge and an additional free parameter. It can be considered as a modification of the GHS-GM solution obtained by changing the coupling between dilaton and electromagnetic field. The general dyonic solution is again characterized by three free parameters, the ADM mass, the magnetic charge and an additional free parameter, which is not the electric charge. According to a definition of the no-hair conjecture the solutions are 'hairy'. A very interesting special case of the dyonic solution is characterized by three free parameters, the ADM mass and the electric and magnetic charges. The solutions satisfy the dominant as well as the strong energy condition outside and on the external horizon. © 2006 IOP Publishing Ltd.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Classical and Quantum Gravity	en
dc.identifier.doi	10.1088/0264-9381/23/24/027	en
dc.identifier.isi	ISI:000242327900030	en
dc.identifier.volume	23	en
dc.identifier.issue	24	en
dc.identifier.spage	7591	en
dc.identifier.epage	7602	en