Rotation, inflation, and lithium in the Pleiades

Abstract

The rapidly rotating cool dwarfs of the Pleiades are rich in lithium relative to their slowly rotating counterparts. Motivated by observations of inflated radii in young, active stars, and by calculations showing that radius inflation inhibits pre-main sequence (pre-MS) Li destruction, we test whether this pattern could arise from a connection between stellar rotation rate and radius inflation on the pre-MS. We demonstrate that pre-MS radius inflation can efficiently suppress lithium destruction by rotationally induced mixing in evolutionary models, and that the net effect of inflation and rotational mixing is a pattern where rotation correlates with lithium abundance for $M_{\ast }<{\mathrm{M}}_{\odot }$, and anti-correlates with lithium abundance for $M_{\ast }>{\mathrm{M}}_{\odot }$, similar to the empirical trend in the Pleiades. Next, we adopt different prescriptions for the dependence of inflation on rotation, and compare their predictions to the Pleiades lithium/rotation pattern. We find that if a connection between rotation and radius inflation exists, then the important qualitative features of this pattern naturally and generically emerge in our models. This is the first consistent physical model to date that explains the Li--rotation correlation in the Pleiades. We discuss plausible mechanisms for inducing this correlation and suggest an observational test using granulation.

arXiv comment17 pages, 9 figures. A short video summarizing the results of our paper can be found here: https://www.youtube.com/watch?v=pnXFBCRQgds

References in corpus (53)

• Disk Frequencies and Lifetimes in Young Clusters
• The K2 Mission: Characterization and Early results
• Accurate masses and radii of normal stars: modern results and applications
• Low Temperature Opacities
• Solar fusion cross sections II: the pp chain and CNO cycles
• Stellar Diameters and Temperatures II. Main Sequence K & M Stars
• The Origin of T Tauri X-ray Emission: New Insights from the Chandra Orion Ultradeep Project
• Keck Spectra of Pleiades Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Edge in the Pleiades
• Timescale of Mass Accretion in Pre-Main-Sequence Stars
• Evolution of low-mass star and brown dwarf eclipsing binaries
• Improved angular momentum evolution model for solar-like stars
• On the Correlation between the Magnetic Activity Levels, the Metallicities and the Radii of Low-Mass Stars
• Time scales of Li evolution: a homogeneous analysis of open clusters from ZAMS to late-MS
• Stellar Models with Microscopic Diffusion and Rotational Mixing I: Application to the Sun
• Episodic accretion at early stages of evolution of low mass stars and brown dwarfs: a solution for the observed luminosity spread in HR diagrams?
• Evidence for Magnetic Flux Saturation in Rapidly Rotating M Stars
• Effect of episodic accretion on the structure and the lithium depletion of low-mass stars and planet-hosting stars
• Fast Star, Slow Star; Old Star, Young Star: Subgiant Rotation as a Population and Stellar Physics Diagnostic
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• Lithium depletion and the rotational history of exoplanet host stars
• The Distances to Open Clusters from Main-Sequence Fitting. III. Improved Accuracy with Empirically Calibrated Isochrones
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. I. Stars with a Radiative Core
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• On the Reliability of Stellar Ages and Age Spreads Inferred from Pre-Main Sequence Evolutionary Models
• An observational correlation between stellar brightness variations and surface gravity
• Stellar Models with Microscopic Diffusion and Rotational Mixing II: Application to Open Clusters
• Angular Momentum Transport In Solar-Type Stars: Testing the Timescale For Core-Envelope Coupling
• Lithium Depletion in Fully Convective Pre-Main Sequence Stars
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. II. Fully Convective Main Sequence Stars
• Why are the K dwarfs in the Pleiades so Blue?
• A Surprising Reversal of Temperatures in the Brown-Dwarf Eclipsing Binary 2MASS J05352184-0546085
• An Empirical Correction for Activity Effects on the Temperatures, Radii, and Estimated Masses of Low-Mass Stars and Brown Dwarfs
• Empirical Tests of Pre-Main-Sequence Stellar Evolution Models with Eclipsing Binaries
• Deep MMT Transit Survey of the Open Cluster M37 III: Stellar Rotation at 550 Myr
• IN-SYNC I: Homogeneous Stellar Parameters from High Resolution APOGEE Spectra for Thousands of Pre-main Sequence Star
• Impact of rotation and disc lifetime on pre-main sequence lithium depletion of solar-type stars
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• A Tale of Two Anomalies: Depletion, Dispersion, and the Connection Between the Stellar Lithium Spread and Inflated Radii on the Pre-Main Sequence
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• The effect of starspots on the radii of low-mass pre-main sequence stars
• The radii of M-dwarfs in the young open cluster NGC 2516
• Radial Velocity Variations of Photometrically Quiet, Chromospherically Inactive Kepler Stars: A Link Between RV Jitter and Photometric Flicker
• OPserver: interactive online-computations of opacities and radiative accelerations
• Magnetic effects and oversized M dwarfs in the young open cluster NGC 2516
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• The Monitor Project: Stellar rotation at 13~Myr: I. A photometric monitoring survey of the young open cluster h~Per
• Lithium Abundances in the alpha Per Cluster
• Li I and K I Scatter in Cool Pleiades Dwarfs
• Accretion-induced luminosity spreads in young clusters: evidence from stellar rotation
• Stellar models of evolved secondaries in CVs

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