DUblack Hole Missing Link Main (image) Durham University Caption A new X-ray source (lower left and detailed in "DUBlack hole missing link Detail 1) detected in the nearby galaxy M31 ("DUBlack hole missing link Overview") was discovered to be associated with an extremely compact radio source (upper right and detailed in "DUBlack hole missing link Detail 2). The coupled X-ray and radio emission point to a stellar-mass black hole accreting above its maximum luminosity threshold. Credit Image credits: The main image, showing the optical image of the galaxy, is from the Digitized Sky Survey. The rest of the images (including the X-ray field overlay) were created by Dr James Miller-Jones, of the Curtin University node of the International Centre for Radio Astronomy Research. Usage Restrictions None 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.