Accretion onto Pre-Main-Sequence Stars

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The Close Binary Fraction of Solar-type Stars Is Strongly Anticorrelated with Metallicity (2018, background): “However, the typical accretion rates are likely variable during the first ≈0.5Myr, and thus most objects experience excursions above (or well above) á ñṀin (Hartmann et al. 2001, 2016; Evans et al. 2009; Offner & McKee 2011).”
Astrochemistry and compositions of planetary systems (2020, background): “However, the accretion rate decays with age (Hartmann et al. 2016), and when it falls below ∼10−8 M /yr the snowline is predicted to move interior to 1 AU (Garaud and Lin 2007; Oka et al.”
Global Simulations of the Inner Regions of Protoplanetary Disks with Comprehensive Disk Microphysics (2017, background): “With typical lifetimes of a few megayears (Haisch et al. 2001), PPDs are known to be rapidly accreting, with typical accretion rates of ~ - M10 8 yr −1 (e.g., Hartmann et al. 2016).”
Molecules with ALMA at Planet-forming Scales (MAPS). I. Program Overview and Highlights (2021, background): “Globally, these accretion disks spread and deplete mass onto the star over time (Lynden-Bell & Pringle 1974; Hartmann et al. 2016).”