The Stellar Mass-Accretion Rate Relation in T Tauri Stars and Brown Dwarfs

摘要: Recent observations show a strong correlation between stellar mass and accretion rate in young substellar objects, with the scaling acc ∝ M holding over more than 4 orders of magnitude rate. We explore consequences this context disk evolution models. note that such is not expected to arise from variations angular momentum transport efficiency mass, we suggest it may reflect systematic trend initial conditions. In case find brown dwarf disks initially have rather larger radii those around massive objects. By considering evolution, invoking simple parameterization for shutoff at end lifetime, models predict scatter mass-accretion relationship should increase increasing rough agreement current observations.