Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative Time Delay in Strongly Naked Singularity Lensing   We model the supermassive galactic center of the Milky Way galaxy as a
strongly naked singularity lens described by the Janis-Newman-Winicour metric.
This metric has an ordinary mass and massless scalar charge parameters. For
very accurate results, we use the Virbhadra-Ellis lens equation for
computations. The galactic center serving as gravitational lens gives rise to 4
images: 2 images on the same side as the source and 2 images on the opposite
side of the source from the optic axis. We compute positions and time delays of
these images for many values of the angular source position. The time delays of
primary images decrease with an increase in angular source position and are
always negative. The time delays of the other 3 images are negative for small
angular source position; however, they increase with an increase in angular
source position. Such observations would support strongly naked singularity
interpretation of the galactic center and, if ever observed, would disprove the
cosmic censorship hypothesis proposed by Roger Penrose as well as a weaker
version by Virbhadra that allows existence of weakly, but not marginally and
strongly naked singularities.

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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an