A ~0.2 solar mass protostar with a Keplerian disk in the very young L1527 IRS system Posted on June 26, 2014 by UHNAI Webmaster in Tobin, J., L. L. Hartmann, H.-F. Chiang, D. J. Wilner, L. W. Looney, L. Loinard, N. Calvet, P. D'Alessio (). A ~0.2 solar mass protostar with a Keplerian disk in the very young L1527 IRS system. , 492,