Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/15043
Title: Acoustic clouds: Standing sound waves around a black hole analogue
Author: Benone, Carolina L.
Crispino, Luis C. B.
Herdeiro, Carlos
Radu, Eugen
Issue Date: 29-May-2015
Publisher: American Physical Society
Abstract: Under certain conditions sound waves in fluids experience an acoustic horizon with analogue properties to those of a black hole event horizon. In particular, a draining bathtub-like model can give rise to a rotating acoustic horizon and hence a rotating black hole (acoustic) analogue. We show that sound waves, when enclosed in a cylindrical cavity, can form stationary waves around such rotating acoustic holes. These acoustic perturbations display similar properties to the scalar clouds that have been studied around Kerr and Kerr-Newman black holes; thus they are dubbed acoustic clouds. We make the comparison between scalar clouds around Kerr black holes and acoustic clouds around the draining bathtub explicit by studying also the properties of scalar clouds around Kerr black holes enclosed in a cavity. Acoustic clouds suggest the possibility of testing, experimentally, the existence and properties of black hole clouds, using analog models.
Peer review: yes
URI: http://hdl.handle.net/10773/15043
DOI: 10.1103/PhysRevD.91.104038
ISSN: 1550-7998
Appears in Collections:CIDMA - Artigos
DFis - Artigos
GGDG - Artigos

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