Evidence for a correlation between mass accretion rates onto young stars and the mass of their protoplanetary disks

摘要: A relation between the mass accretion rate onto central young star and of surrounding protoplanetary disk has long been theoretically predicted observationally sought. For first time, we have accurately homogeneously determined photospheric parameters, rate, for an essentially complete sample stars with disks in Lupus clouds. Our work combines results surveys conducted VLT/X-Shooter ALMA. With this dataset are able to test a basic prediction viscous theory, existence linear total mass. We find correlation dust mass, ratio that is roughly consistent expected timescale when assuming interstellar medium gas-to-dust ratio. This confirms rates related properties outer disk. no measured by CO isotopologues emission lines, possibly owing small number gas masses. suggests mm-sized better traces masses derived from may be underestimated, at least some cases.