Sunborn / Jeffrey A. Carver.

Enhanced descriptions from Syndetics:

With a plot inspired by chaos theory, fully realized characters, and plenty of twists and turns, this exciting hard SF adventure will keep readers on the edge of their seats. John Bandicut and several aliens and artificial intelligences have been thrown together by a force greater than themselves to prevent cataclysmic disasters on an interstellar scale. Now, before they can take a break after a world-saving mission, they are pulled into a waystation that is being threatened by highly destructive gravity waves.The waves are part of a much larger problem. Something is causing stars to become unstable and go prematurely nova - they're being murdered. When the waystation is destroyed by the gravity waves, Bandicut and his crew barely escape on a jury-rigged ship. Their destination is a star nursery in the Orion Nebula, where sentient stars are being driven to destruction by an artificial intelligence bent on remaking the cosmos in its own image.