Black hole greybody factors and D-brane spectroscopy
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855 (United States)
- Department of Physics, University of California, Santa Barbara, California 93106 (United States)
Black holes do not Hawking-radiate strictly blackbody radiation due to well-known frequency-dependent greybody factors. These factors arise from frequency-dependent potential barriers outside the horizon which filter the initially blackbody spectrum emanating from the horizon. D-brane bound states, in a thermally excited state corresponding to near-extremal black holes, also do not emit blackbody radiation: The bound state radiation spectrum encodes the energy spectrum of its excitations. We study a near-extremal five-dimensional black hole. We show that in a wide variety of circumstances including both neutral and charged emission, the effect of the greybody filter is to transform the blackbody radiation spectrum precisely into the bound state radiation spectrum. Implications of this result for the information puzzle in the context of near-extremal black hole dynamics are discussed. {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- FG03-91ER40618; FG05-90ER40559
- OSTI ID:
- 474652
- Journal Information:
- Physical Review, D, Vol. 55, Issue 2; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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