Data di Pubblicazione:
2009
Citazione:
A new proof of the odd number of images generated by a non-singular gravitational lens / M. Lombardi. - In: IL NUOVO CIMENTO B. - ISSN 2037-4895. - 124:4(2009 Apr), pp. 363-373.
Abstract:
In this paper we provide a new proof of a general theorem on
gravitational lenses, first shown by Burke (1981) for the special case of thin lenses.
The theorem states that a transparent gravitational lens with non-singular mass
distribution produces an odd number of images of a point source. Our general
proof shows that the topological and Brouwer’s degrees find natural and interesting
applications in the theory of gravitational lenses.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
M. Lombardi
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