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Letter. Shrinking the braneworld: black hole in a globular cluster

Letter. Shrinking the braneworld: black hole in a globular cluster
Letter. Shrinking the braneworld: black hole in a globular cluster
Large extra dimensions have been proposed as a possible solution to the hierarchy problem in physics. In one of the suggested models, the RS2 braneworld model, black holes may evaporate by Hawking radiation faster than in general relativity, on a timescale that depends on the black hole mass and on the asymptotic radius of curvature of the extra dimensions. Thus the size of the extra dimensions can be constrained by astrophysical observations. Here we point out that the black hole, recently discovered in an extragalactic globular cluster, places the strongest upper limit on the size of the extra dimensions in the RS2 model, L lsim 0.003 mm. This black hole has the virtues of old age and relatively small mass. The derived upper limit is within an order of magnitude of the absolute limit afforded by astrophysical observations of black holes.
black hole physics, early universe, galaxies: star clusters
0004-637X
L168-L171
Gnedin, Oleg Y.
b970ab3a-e053-463b-9859-85ddd6de8618
Maccarone, Thomas J.
27e6101c-8fa4-41db-ba75-d2ee3d1a0c53
Psaltis, Dimitrios
eeb5d60d-1139-4cdd-be2e-b3c10c1c7bc2
Zepf, Stephen E.
108fcc75-6611-48a3-b405-99737b38af85
Gnedin, Oleg Y.
b970ab3a-e053-463b-9859-85ddd6de8618
Maccarone, Thomas J.
27e6101c-8fa4-41db-ba75-d2ee3d1a0c53
Psaltis, Dimitrios
eeb5d60d-1139-4cdd-be2e-b3c10c1c7bc2
Zepf, Stephen E.
108fcc75-6611-48a3-b405-99737b38af85

Gnedin, Oleg Y., Maccarone, Thomas J., Psaltis, Dimitrios and Zepf, Stephen E. (2009) Letter. Shrinking the braneworld: black hole in a globular cluster. Astrophysical Journal, 705 (2), L168-L171. (doi:10.1088/0004-637X/705/2/L168).

Record type: Article

Abstract

Large extra dimensions have been proposed as a possible solution to the hierarchy problem in physics. In one of the suggested models, the RS2 braneworld model, black holes may evaporate by Hawking radiation faster than in general relativity, on a timescale that depends on the black hole mass and on the asymptotic radius of curvature of the extra dimensions. Thus the size of the extra dimensions can be constrained by astrophysical observations. Here we point out that the black hole, recently discovered in an extragalactic globular cluster, places the strongest upper limit on the size of the extra dimensions in the RS2 model, L lsim 0.003 mm. This black hole has the virtues of old age and relatively small mass. The derived upper limit is within an order of magnitude of the absolute limit afforded by astrophysical observations of black holes.

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Published date: November 2009
Keywords: black hole physics, early universe, galaxies: star clusters

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Local EPrints ID: 79528
URI: http://eprints.soton.ac.uk/id/eprint/79528
ISSN: 0004-637X
PURE UUID: f0cb751d-2aac-449b-8347-9659d5dc0cf9

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Date deposited: 16 Mar 2010
Last modified: 14 Mar 2024 00:31

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Contributors

Author: Oleg Y. Gnedin
Author: Thomas J. Maccarone
Author: Dimitrios Psaltis
Author: Stephen E. Zepf

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