CSI 2264: Simultaneous optical and infrared light curves of young disk-bearing stars in NGC 2264 with CoRoT and Spitzer-- evidence for multiple origins of variability

Abstract

We present the Coordinated Synoptic Investigation of NGC 2264, a continuous 30-day multi-wavelength photometric monitoring campaign on more than 1000 young cluster members using 16 telescopes. The unprecedented combination of multi-wavelength, high-precision, high-cadence, and long-duration data opens a new window into the time domain behavior of young stellar objects. Here we provide an overview of the observations, focusing on results from Spitzer and CoRoT. The highlight of this work is detailed analysis of 162 classical T Tauri stars for which we can probe optical and mid-infrared flux variations to 1% amplitudes and sub-hour timescales. We present a morphological variability census and then use metrics of periodicity, stochasticity, and symmetry to statistically separate the light curves into seven distinct classes, which we suggest represent different physical processes and geometric effects. We provide distributions of the characteristic timescales and amplitudes, and assess the fractional representation within each class. The largest category (>20%) are optical "dippers" having discrete fading events lasting ~1-5 days. The degree of correlation between the optical and infrared light curves is positive but weak; notably, the independently assigned optical and infrared morphology classes tend to be different for the same object. Assessment of flux variation behavior with respect to (circum)stellar properties reveals correlations of variability parameters with H$\alpha$ emission and with effective temperature. Overall, our results point to multiple origins of young star variability, including circumstellar obscuration events, hot spots on the star and/or disk, accretion bursts, and rapid structural changes in the inner disk.

Published in AJ. 59 pages; 4 tables; 49 figures, most of which are highly degraded to fit size limits. Author name typo corrected. For a better resolution version, please visit http://web.ipac.caltech.edu/staff/amc/codyetal2014.pdf

References in corpus (14)

• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• Measuring the rotation period distribution of field M-dwarfs with Kepler
• Magnetospheric accretion-ejection processes in the classical T Tauri star AA
• Results of the ROTOR-program. I. The long-term photometric variability of classical T Tauri stars
• Results of the ROTOR-program. II. The long-term photometric variability of weak-line T Tauri stars
• CSI 2264: Characterizing Accretion-Burst Dominated Light Curves for Young Stars in NGC 2264
• Near-Infrared Variability in the 2MASS Calibration Fields: A Search for Planetary Transit Candidates
• Photometric variability of the T Tauri star TW Hya on time scales of hours to years
• ACIS-I observations of NGC2264. Membership and X-ray properties of PMS stars
• Oscillations of MHD shock waves on the surfaces of T Tauri stars
• Testing the Disk Regulation Paradigm with Spitzer Observations. I. Rotation Periods of Pre-main Sequence Stars in the IC 348 Cluster
• Deep near-IR variability survey of pre-main-sequence stars in Rho Ophiuchi
• The Peculiar Periodic YSO WL 4 in Rho Ophiuchus
• The Young Cluster and Star Forming Region NGC 2264

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