Mass accretion rates in self-regulated disks of T Tauri stars

Abstract

We have studied numerically the evolution of protostellar disks around intermediate and upper mass T Tauri stars (0.25 M_sun < M_st < 3.0 M_sun) that have formed self-consistently from the collapse of molecular cloud cores. In the T Tauri phase, disks settle into a self-regulated state, with low-amplitude nonaxisymmetric density perturbations persisting for at least several million years. Our main finding is that the global effect of gravitational torques due to these perturbations is to produce disk accretion rates that are of the correct magnitude to explain observed accretion onto T Tauri stars. Our models yield a correlation between accretion rate M_dot and stellar mass M_st that has a best fit M_dot \propto M_st^{1.7}, in good agreement with recent observations. We also predict a near-linear correlation between the disk accretion rate and the disk mass.

arXiv commentAccepted for publication in ApJ Letters

References in corpus (16)

• Spectral Energy Distributions of T Tauri Stars With Passive Circumstellar Disks
• Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective
• Accretion in Young Stellar/Substellar Objects
• The Burst Mode of Protostellar Accretion
• Accretion in the Rho-Oph pre-main sequence stars
• The T Tauri Phase Down to Nearly Planetary Masses: Echelle Spectra of 82 Very Low Mass Stars and Brown Dwarfs
• The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation
• Measuring Accretion in Young Substellar Objects: Approaching the Planetary Mass Regime
• Exploring brown dwarf disks: A 1.3 mm survey in Taurus
• Why Do T Tauri Disks Accrete?
• First Detection of Millimeter Dust Emission from Brown Dwarf Disks
• Accretion in protoplanetary disks: the imprint of core properties
• The stellar mass-accretion rate relation in T Tauri stars and brown dwarfs
• A Solution to the Protostellar Accretion Problem
• Self-regulated gravitational accretion in protostellar discs
• Variable accretion and outflow in young brown dwarfs

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