The High Energy X-ray Probe (HEX-P): Constraining Supermassive Black Hole Growth with Population Spin Measurements
J.M Piotrowska, J.A García, D.J Walton, R.S Beckmann, D Stern, D.R Ballantyne, D.R Wilkins, S Bianchi, P.G Boorman, J Buchner, C.-T Chen, P Coppi, T Dauser, A.C Fabian, E Kammoun, K Madsen, L Mallick, G Matt, G Matzeu, E Nardini, A Pizzetti, S Puccetti, C Ricci, F Tombesi, N Torres-Albà, K.-W Wong