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Non-trivial saddles in microscopic description of black holes
Non-trivial gravitational saddles have played a key role in the island proposal for the black hole information paradox. It is worth asking if...
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Spinning primordial black holes from first order phase transition
We conduct a novel study to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false...
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The correspondence between rotating black holes and fundamental strings
The correspondence principle between strings and black holes is a general framework for matching black holes and massive states of fundamental...
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Supermassive Black Holes in Nearby Galaxy Centers
Almost exactly 40 years ago, quasars were discovered by M. Schmidt [43] and others. Soon thereafter, Zel’dovich [50] and Salpeter [42] suspected that...
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The Environmental Impact of Supermassive Black Holes
The supermassive black holes observed at the centers of almost all present-day galaxies had a profound impact on their environment. I highlight the...
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Constrained spin systems and KNdS black holes
Kerr-Newman de Sitter (KNdS) spacetimes have a rich thermodynamic structure that involves multiple horizons, and so differs in key respects from...
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Quantum rotating black holes
We consider black holes generically sourced by quantum matter described by regular wavefunctions. This allows for integrable effective energy...
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Ladder symmetries and Love numbers of Reissner-Nordström black holes
It is well known that asymptotically flat black holes in general relativity have vanishing tidal Love numbers. In the case of Schwarzschild and Kerr...
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Black Holes
In this chapter we discuss different issues on black holes. In particular, we briefly present the Kerr solution for rotating black holes. Moreover,...
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Intermediate-Mass Black Holes in Active Galactic Nuclei
Little is currently known about the demographics of black holes in the intermediate-mass range 103–106 M⊙, but a small fraction of dwarf galaxies and...
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Investigation of black hole complementarity in AdS2 black holes
Black hole complementarity plays a pivotal role in resolving the information loss paradox by treating Hawking radiation as carriers of information,...
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Observational appearance of Kaluza–Klein black holes
The optical properties of rotating black holes in Kaluza–Klein theory described by the total mass, spin, and electric and magnetic charges are...
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Singularities in 2D and 3D quantum black holes
We study black holes in two and three dimensions that have spacelike curvature singularities behind horizons. The 2D solutions are obtained by...
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Holographic complexity of rotating quantum black holes
We study holographic complexity for the rotating quantum BTZ black holes (quBTZ), the BTZ black holes with corrections from bulk quantum fields....
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Formation of the First Supermassive Black Holes
Understanding the emergence of the first supermassive black holes, and hence the first quasars, is a crucial ingredient for models of reionization...
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Photon ring bounds of scalar hairy charged black holes
We study photon rings of constant scalar hairy black holes with mass m , charge Q , and scalar hair S obtained from the Einstein-Maxwell-conformally...
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Flows of rotating extremal attractor black holes
We investigate the attractor mechanism of five-dimensional extremal rotating black holes in Einstein gravity minimally coupled with a multiplet...
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Derivative corrections to extremal black holes with moduli
We derive formulas for the leading mass, entropy, and long-range self-force corrections to extremal black holes due to higher-derivative operators....
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Supersymmetric index for small black holes
Supersymmetric elementary string states in the compactified heterotic string theory are described by small black holes that have zero area event...