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Export Reference (APA) 
Rocha, J. V. (2023). Black hole-Wormhole mergers: Can one peek into the black hole interior?. Invited seminar at University of Barcelona.
Export Reference (IEEE) 
J. M. Rocha,  "Black hole-Wormhole mergers: Can one peek into the black hole interior?", in Invited seminar at University of Barcelona, Barcelona, 2023
Export BibTeX 
@misc{rocha2023_1716197292959,
	author = "Rocha, J. V.",
	title = "Black hole-Wormhole mergers: Can one peek into the black hole interior?",
	year = "2023",
	url = "https://icc.ub.edu/event/black-hole-wormhole-mergers-can-one-peek-black-hole-interior"
}
Export RIS 
TY  - CPAPER
TI  - Black hole-Wormhole mergers: Can one peek into the black hole interior?
T2  - Invited seminar at University of Barcelona
AU  - Rocha, J. V.
PY  - 2023
CY  - Barcelona
UR  - https://icc.ub.edu/event/black-hole-wormhole-mergers-can-one-peek-black-hole-interior
AB  - In the extreme mass ratio limit, the evolution of the event horizon when a large black hole merges with a small compact object has been shown to be acces- sible analytically with elementary ray-tracing techniques. I will describe what happens when the small body is an Ellis-Bronnikov traversable wormhole. A double-mouth wormhole within the same universe is obtained by gluing two such geometries — in this setting the ratio of the distance between the two mouths to the distance traversed through the wormhole plays an important role. At scales comparable to the wormhole, its geometry drastically distorts the planar horizon of the infinitely large black hole. When a ‘short’ wormhole falls in, the horizon wraps around it and an ‘island’ is formed, representing a region of spacetime that is spatially disconnected from the exterior of the black hole, but in causal contact with future null infinity (through the wormhole). This region shrinks as time evolves and eventually disappears. The lifetime of the island essentially grows linearly with the inter-mouth distance, but also decreases linearly with the length of the wormhole throat. Imposing physically reasonable energy con- ditions severely restricts the duration of the open communication channel with the interior of the black hole.
ER  -