Analysis of MOST light curves of five young stars in Taurus-Auriga and Lupus 3 Star Forming Regions

Abstract

Continuous photometric observations of five young stars obtained by the MOST satellite in 2009 and 2010 in the Taurus and Lupus star formation regions are presented. Using light curve modelling under the assumption of internal invariability of spots, we obtained small values of the solar-type differential-rotation parameter (k=0.0005-0.009) for three spotted weak-line T Tau stars, V410 Tau, V987 Tau and Lupus 3-14; for another spotted WTTS, Lupus 3-48, the data are consistent with a rigidly rotating surface (k=0). Three flares of similar rise (4 min 30 sec) and decay (1 h 45 min) times were detected in the light curve of Lupus 3-14. The brightness of the classical T Tau star RY Tau continuously decreased over 3 weeks of its observations with a variable modulation not showing any obvious periodic signal.

Accepted by MNRAS

References in corpus (3)

• Results of the ROTOR-program. II. The long-term photometric variability of weak-line T Tauri stars
• The T Tauri star RY Tau as a case study of the inner regions of circumstellar dust disks
• Analysis of the MOST light curve of the heavily spotted K2IV component of the single-line spectroscopic binary II Pegasi

Cited by in corpus (7)

• Multi-epoch Ultraviolet HST Observations of Accreting Low-mass Stars
• Precise High-Cadence Time Series of Five Variable Young Stars in Auriga with MOST
• Stable and unstable accretion in the classical T Tauri stars IM Lup and RU Lup as observed by MOST
• The T Tauri star V410 Tau in the eyes of SPIRou and TESS
• Wind Dynamics and Circumstellar Extinction Variations in the T Tauri Star RY Tau
• X-ray Properties of Low-Mass Pre-Main Sequence Stars in the Orion Trapezium Cluster
• Investigating stellar surface rotation using observations of starspots