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Constraints on Extra Dimensions from Black-Hole Binary Systems

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). Outline

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Constraints on Extra Dimensions from Black-Hole Binary Systems

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  1. 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)

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

  3. 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 Gauss‘s law for r > 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

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

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

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

  7. TJ, Psaltis, McClintock (2009)

  8. TJ (2009)

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

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

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

  12. Tim Johannsen — Constraints on Extra Dimensions from Black Holes 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 < 161µm • J1118+480: L < 0.97mm • observations: L 35µm TJ, Güver, Psaltis, in prep. Bok Telescope, Kitt Peak, AZ

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