244 citations
- Hadassah Academic CollegeIL76 papers
- Hadassah Medical CenterIL4 papers
- Ben-Gurion University of the NegevIL3 papers
- Centre National de la Recherche ScientifiqueFR3 papers
- Tel Aviv UniversityIL3 papers
- Achva Academic CollegeIL2 papers
- Hebrew University of JerusalemIL2 papers
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- Universidad Autónoma de MadridES2 papers
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- B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of UkraineUA1 paper
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7 papers · 2 filters
The fastest way to circle a black hole
Shahar Hod
Black-hole spacetimes with a "photonsphere", a hypersurface on which massless particles can orbit the black hole on circular null geodesics, are studied. We prove that among all po…
Hairy Black Holes and Null Circular Geodesics
Shahar Hod
Einstein-matter theories in which hairy black-hole configurations have been found are studied. We prove that the nontrivial behavior of the hair must extend beyond the null circula…
Quasinormal resonances of a massive scalar field in a near-extremal Kerr black hole spacetime
Shahar Hod
The fundamental resonances of near-extremal Kerr black holes due to massive scalar perturbations are derived {\it analytically}. We show that there exists a critical mass parameter…
Hyperentropic systems and the generalized second law of thermodynamics
Shahar Hod
The holographic bound asserts that the entropy of a system is bounded from above by a quarter of the area of a circumscribing surface measured in Planck areas: $S\le…
Bulk emission by higher-dimensional black holes: almost perfect blackbody radiation
Shahar Hod
We study the Hawking radiation emitted into the bulk by -dimensional Schwarzschild black holes. It is well-known that the black-hole spectrum departs from exact blackbody fo…
Higher-dimensional violations of the holographic entropy bound
Shahar Hod
The holographic bound, , asserts that the entropy of a system is bounded from above by a quarter of the area of a circumscribing surface measured in Planc…