Disk-locking and the presence of slow rotators among solar-type stars in young star clusters

Abstract

The simultaneous presence of both the so-called `ultra-fast rotators' and slowly rotating stars among the solar-type stars ($\sim 0.6-1.2M_{\odot }$) in the same young star clusters has been a puzzle in the field of stellar rotation. No model to date has been able to explain both by a single mechanism intrinsic to the star and questions about the appropriate initial conditions for models often complicate the problem. In this paper, using the same starting conditions for the models that we used in examining the origin of the ultra-fast rotators in young star clusters, we show that the slowest rotators demand an extrinsic mechanism. Assuming that this mechanism is a disk-star interaction, we determine that a disk-locking timescale of a few Myr must operate for this type of star. If, instead of allowing (radial) differential rotation, we enforce solid-body rotation, the models require timescales about two to three times as long.

24pages, 6 figures, accepted for publication in ApJ

Cited by in corpus (25)

• On the rotational evolution of solar- and late-type stars, its magnetic origins, and the possibility of stellar gyrochronology
• Angular Momentum Loss from Cool Stars: An Empirical Expression and Connection to Stellar Activity
• X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main sequence stars
• The spin of accreting stars: dependence on magnetic coupling to the disc
• The Color-Period Diagram and Stellar Rotational Evolution - New Rotation Period Measurements in the Open Cluster M34
• Magnetic and Gravitational Disk-Star Interactions: An Interdependence of PMS Stellar Rotation Rates and Spin-Orbit Misalignments
• The Mass Dependence of Stellar Rotation in the Orion Nebula Cluster
• Blue Stragglers as Stellar Collision Products: the Angular Momentum Question
• The Angular Momentum Evolution of 0.1-10 Msun Stars From the Birthline to the Main Sequence
• An assessment of the rotation rates of the host stars of extrasolar planets
• Rotational Evolution of Solar-Like Stars in Clusters from Pre-Main Sequence to Main Sequence: Empirical Results
• Infrared study of the eta Chamaeleontis cluster and the longevity of circumstellar discs
• Are beryllium abundances anomalous in stars with giant planets?
• Beryllium abundances in stars hosting giant planets
• Rotational Studies of Late-Type Stars. VII. M34 (NGC 1039) and the Evolution of Angular Momentum and Activity in Young Solar-Type Stars
• Do accretion discs regulate the rotation of young stars?
• Mapping stellar surfaces II: An interpretable Gaussian process model for light curves
• Angular Momentum Evolution of Stars in the Orion Nebula Cluster
• Modest-2: A Summary
• On the Rotation of Post-T Tauri Stars in Associations
• The Mean Magnetic Field Strength of CI Tau
• Magnetic braking with MESA evolutionary models in the single star and LMXB regimes
• Measurement of the angular momenta of pre-main-sequence stars: early evolution of slow and fast rotators and empirical constraints on spin-down torque mechanisms
• The Pre-main Sequence: Challenges and Prospects for Asteroseismology
• Stellar models simulating the disk-locking mechanism and the evolutionary history of the Orion Nebula cluster and NGC2264