Accretion Disc Surrounding the Black Hole V404 Cygni (1 of 2) (video) Instituto de Astrofísica de Canarias (IAC) Share Print E-Mail Loading video... Caption Simulation of the accretion disc surrounding the black hole V404 Cygni, where the intense wind detected by GTC becomes evident. Credit Gabriel Pérez, SMM (IAC). Usage Restrictions Documents and materials on the IAC website are copyright of the Instituto de Astrofísica de Canarias. Use for commercial and publicity purposes is not authorised. Text and images may only be reproduced with the prior express permission of the Science Communication and Education Unit of the Instituto de Astrofísica de Canarias. To request permission: Include the address of the image (or information about it) in a request addressed to the Head of the Communication and Scientific Culture Unit (secUC3@iac.es) explaining what the image will be used for. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.