A Revised Gyro-Age for M 67 from Kepler/K2-Campaign-5 Light Curves

Abstract

We revisit the photometric variability of stars in the M 67 field using Kepler/K2-Campaign-5 light curves. In our previous work, we limited the search area around M\,67 to that of a recent ground-based study. In the present work, we expand the search area and apply a more rigorous period-finding algorithm to determine the rotation periods of 98 main sequence cluster members from the same data. In addition, we derive periods of 40 stars from the K2SC detrended light curves. We determine the mean period of single sun-like main sequence cluster members to be $29.6\pm 0.6$ d. Assuming the periods correspond to stellar rotation, the corresponding mean gyro-age is $5.4\pm 0.2$ Gyr.

arXiv commentaccepted for publication in MNRAS

References in corpus (12)

• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• K2SC: Flexible systematics correction and detrending of K2 light curves using Gaussian Process regression
• Angular Momentum Loss from Cool Stars: An Empirical Expression and Connection to Stellar Activity
• Ground-based CCD astrometry with wide field imagers. II. A star catalogue for M67: [email protected] MPG/ESO astrometry, FLAMES@VLT radial velocities
• Rotation periods for cool stars in the 4 Gyr-old open cluster M67, the solar-stellar connection, and the applicability of gyrochronology to at least solar age
• Stellar Radial Velocities in the Old Open Cluster M67 (NGC 2682) I. Memberships, Binaries, and Kinematics
• Deep 2MASS Photometry of M67 and Calibration of the Main Sequence J-Ks Color Difference as an Age Indicator
• On using the CMD morphology of M67 to test solar abundances
• Variable stars in one open cluster within the Kepler/K2-Campaign-5 field: M 67 (NGC 2682)
• Variability Among Stars in the M 67 Field from Kepler/K2-Campaign-5 Light Curves
• The Origin of Enhanced Activity in the Suns of M67

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• The active lives of stars: a complete description of rotation and XUV evolution of F, G, K, and M dwarfs
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• A Relationship Between Stellar Age and Spot Coverage
• Ultraviolet stellar population of the old open cluster M67 (NGC 2682)
• New insights into the rotational evolution of near-solar age stars from the open cluster M67
• Li abundances for solar twins in the open cluster M67
• The K2 M67 Study: Establishing the Limits of Stellar Rotation Period Measurements in M67 with K2 Campaign 5 Data
• K2 Observations of 95 Vir: delta Scuti Pulsations in a Chromospherically Active Star