1. Constraints on Extra Dimensions from Black-Hole Binary Systems Tim Johannsen The University of Arizona Collaborators: D. Psaltis (Arizona) J. E. McClintock (Harvard) J. E. McClintock (Harvard) T. Güver (Arizona) T. Güver (Arizona)

2. Outline Black-hole evaporation in braneworld gravityBlack-hole evaporation in braneworld gravity Constraints from black-hole binariesConstraints from black-hole binaries New observationsNew observations Tim Johannsen — Constraints on Extra Dimensions from Black Holes

3. The Idea of Extra Dimensions hierarchy problem: gravity  other forces Planck scale ~ 10 19 GeV EW scale ~ 10 3 GeV remedy:extra dimensions! problem: space is 3D by Gauss‘s law for r > 44 µm ADD: - compactified - brane and bulk - brane and bulk Tim Johannsen — Constraints on Extra Dimensions from Black Holes Kapner et al. (2007) Arkani-Hamed, Dimopoulos, Dvali (1998)

4. RS2: - 1 infinite(!) extra dimension - 1 infinite(!) extra dimension - asymptotic curvature radius L - asymptotic curvature radius L Black holes unstable Evaporation: ---- ---- RS2 Braneworld Gravity Randall, Sundrum (1999) Tim Johannsen — Constraints on Extra Dimensions from Black Holes Tanaka (2003) Emparan, García-Bellido, Kaloper (2003)

5. Black-Hole Binary Systems companion filling its Roche lobe companion filling its Roche lobe accretion through the inner accretion through the inner Lagrangian point Lagrangian point → write equation for Tim Johannsen — Constraints on Extra Dimensions from Black Holes evaporation term + magnetic braking term + evolution term

6. Black-Hole Binary Systems Tim Johannsen — Constraints on Extra Dimensions from Black Holes

7. TJ, Psaltis, McClintock (2009)

8. TJ (2009)

9. A0620-00 TJ, Psaltis, McClintock (2009) L < 161µm

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

11. table-top bound TJ, Psaltis, McClintock (2009) A0620-00

12. Conclusions & Present Observations branewold gravity predicts short lifetimes of branewold gravity predicts short lifetimes of black holes black holes size of extra dimensions can be constrained size of extra dimensions can be constrained from black-hole binaries from black-hole binaries A0620  00: L < 161µm J1118+480: L < 0.97mm observations: L  35µm Tim Johannsen — Constraints on Extra Dimensions from Black Holes TJ, Güver, Psaltis, in prep. Bok Telescope, Kitt Peak, AZ