Tachyon Hair on Two-Dimensional Black Holes

Abstract

Static black holes in two-dimensional string theory can carry tachyon hair. Configurations which are non-singular at the event horizon have non-vanishing asymptotic energy density. Such solutions can be smoothly extended through the event horizon and have non-vanishing energy flux emerging from the past singularity. Dynamical processes will not change the amount of tachyon hair on a black hole. In particular, there will be no tachyon hair on a black hole formed in gravitational collapse if the initial geometry is the linear dilaton vacuum. There also exist static solutions with finite total energy, which have singular event horizons. Simple dynamical arguments suggest that black holes formed in gravitational collapse will not have tachyon hair of this type.

11 pages, 1 figure (not included), uses phyzzx, SU-ITP-93-10

References in corpus (6)

• Evanescent Black Holes
• Hawking Radiation and Back-Reaction
• Stringy Quantum Effects in 2-Dimensional Black-Hole
• Matrix Models and Black Holes
• Black hole formation in $c=1$ String Field Theory
• Classical Solutions in Two-Dimensional String Theory and Gravitational Collapse

Cited by in corpus (10)

• An analytic Lifshitz black hole
• Geometric Entropy of Nonrelativistic Fermions and Two Dimensional Strings
• Global geometry of two-dimensional charged black holes
• Stability analysis of the Witten black hole (cigar soliton) under world-sheet RG flow
• The Fixed Points of RG Flow with a Tachyon
• Tachyon Field Quantization and Hawking Radiation
• Blushift of a tachyon in the charged 2D black hole
• Tachyon Hair for Two-Dimensional Black Holes
• String-Motivated Model
• Tachyon Perturbation on Two Dimensional Black Hole