Understanding Galaxy Formation through IIB Superstring Theory and Dark Matter Alternatives
This work explores galaxy formation within the framework of IIB Superstring theory, addressing the challenges of the ΛCDM model, including issues with dark energy and matter. Key problems such as extreme fine-tuning and inconsistencies in central density profiles are examined. Alternative dark matter concepts, including self-interacting, warm, and decaying dark matter, are discussed as potential solutions. The IIB Superstring model promises to reconcile with observations, predicting specific mass power spectrum behaviors and proposing the dilaton field as a viable dark matter candidate.
Understanding Galaxy Formation through IIB Superstring Theory and Dark Matter Alternatives
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Galaxy formation from the IIB Superstring with FluxesTonatiuh Matoshttp:/www.fis.cinvestav.mx/~tmatos
Problems with the CDM Model • Dark Energy: • Extreme fine tuning for • Coincidence • Dark Matter: • Cuspy central density profiles • Too much substructure • Too late galaxy formation • Too early metalicity formation • Etc.
Some Alternatives • Self-Interacting DM • Warm DM • Super Heavy DM • Self-Annihilating DM • Repulsive DM • Fuzzy DM • Decaying DM • Scalar Field Dark Matter • V = V0 (cosh()-1)
Cosmology from Superstrings Theory • R. Kallosh • R. Brandenberger • D. Wands, etc.
Cosmology from Superstrings Theory • R. Kallosh • R. Brandenberger
IIB Superstrings theory with FluxesPhys.Rev.D67:046006,2003 • Type IIB Superstrings With Fluxes
Bose-Einstein Condensate + dV/d = 0 • V = V0[cosh() – 1]
Bose-Einstein Condensates • Tc TeV • m < 10-17 eV • Mcrit 0.1 M2Planck /m
Scalar Field Fluctuation = HaloTonatiuh Matos and F. Siddhartha GuzmanClass. Q. Grav. 17(2000)L9; Tonatiuh Matos, F. Siddhartha Guzman and Dario Nuñez, Phys. Rev. D62(2000)061301(R);Tonatiuh Matos and F. Siddhartha Guzman,Class.Q. Grav. 18(2001)5055 • M 0.1 M2Planck /m • If m 10-23 eV • M 1012 Mo
The ModelT. Matos, R. Luevano, H. H. Garcia Compean. • Inflation • hin • V = V0[cosh() – 1] +Axion • exp() F2
Omegas exp()zoom
Density Profiles LSB Galaxies
Density Profiles LSB Galaxies
Summarizing • The IIB Superstring model: • Behaves as CDM after recombination. • Reproduces all the successes CDM above galactic scales. • Predicts a sharp cut-off in the mass power spectrum • The favored values for the two free parameters • 20 V0 (310-27 Mpl )4 m 10-23 eV
Conclusions • The differences between IIB superstrings and CDM: • 1) Recombination • 2) Center of the Galaxies
Conclusion • The Dilaton could be a good candidate to be the Dark Matter of the Universe
