Astronomer, IfA Director
Ph. D. 1984, Ludwig-Maximilians-Universität München
IfA Mānoa, C-202
(808) 956-8566(808) 956-8566


We study the growth of black holes over cosmic time, using X-ray surveys and optical follow-up observations on Maunakea. We have recently discovered a significant cross-correlation signal between the X-ray and the infrared background, which may be the fingerprint of the first black holes.