Constraints on Extra Dimensions from BlackHole Binary Systems

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Constraints on Extra Dimensions from Black-Hole
Binary Systems
Tim Johannsen The University of
Arizona Collaborators D. Psaltis (Arizona)
J. E. McClintock
(Harvard) T. Güver
(Arizona)
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• Outline
• Black-hole evaporation in
  braneworld gravity
• Constraints from black-hole binaries
• New observations

Tim Johannsen Constraints on Extra
Dimensions from Black Holes
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The Idea of Extra Dimensions hierarchy problem
gravity ? other forces Planck scale 1019 GeV
EW scale 103 GeV remedy extra
dimensions! problem space is 3D by Gausss
law for r gt 44 µm ADD - compactified
- brane and bulk
Kapner et al. (2007)
Arkani-Hamed, Dimopoulos, Dvali (1998)
Tim Johannsen Constraints on Extra
Dimensions from Black Holes
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RS2 - 1 infinite(!) extra dimension -
asymptotic curvature radius L Black holes
unstable Evaporation
RS2 Braneworld Gravity
Randall, Sundrum (1999)
Tanaka (2003)
Emparan, García-Bellido, Kaloper (2003)
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Black-Hole Binary Systems

• companion filling its Roche lobe
• accretion through the inner
• Lagrangian point
• ? write equation for

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Black-Hole Binary Systems
Black-Hole Binary Systems
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TJ, Psaltis, McClintock (2009)
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TJ (2009)
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• A0620-00

L lt 161µm
TJ, Psaltis, McClintock (2009)
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• A0620-00

measurement?
TJ, Psaltis, McClintock (2009)
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• A0620-00

table-top bound
TJ, Psaltis, McClintock (2009)
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Conclusions Present Observations

• branewold gravity predicts short lifetimes of
• black holes
• size of extra dimensions can be constrained
• from black-hole binaries
• A0620?00 L lt 161µm
• J1118480 L lt 0.97mm
• observations L ? 35µm

TJ, Güver, Psaltis, in prep.
Bok Telescope, Kitt Peak, AZ