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Gyrochronology in the Era of Wide-field, High-cadence, Synoptic Photometric Surveys

Gyrochronology in the Era of Wide-field, High-cadence, Synoptic Photometric Surveys. Establishing the Membership and Ages of Galactic Open Clusters. http://www.quantumdiaries.org/wp-content/uploads/2011/02/11-0035-08D1.jpg. VU KELT Meeting: Nashville, TN , 2011

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Gyrochronology in the Era of Wide-field, High-cadence, Synoptic Photometric Surveys

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  1. Gyrochronology in the Era of Wide-field, High-cadence, Synoptic Photometric Surveys Establishing the Membership and Ages of Galactic Open Clusters. http://www.quantumdiaries.org/wp-content/uploads/2011/02/11-0035-08D1.jpg VU KELT Meeting: Nashville, TN, 2011 David James & PhillCargile CTIO – djj@ctio.noao.edu Courtesy: SØrenMeibom (Priv. Comm)

  2. Solar-mass Stellar Evolution on the Main Sequence http://sohowww.nascom.nasa.gov/gallery/Movies/sunspots.html Skumanich spin-down (1972) Open cluster evolution of rotation rates (Stauffer et al., 1994) Preferential use of rotation periods to trace stellar evolution: inclination angle, radius effect Pitfalls: Binaries, long-term trends, activity cycles

  3. Measuring Photometric Rotation Periods: The Galilean Way http://sohowww.nascom.nasa.gov/gallery/Movies/sunspots.html

  4. The Future of Gyrochronology: Synoptic Surveys: • What is gyrochronology ? • Using rotation periods to determine the age of a star. • Distance independent method: advantage over traditional isochrone-fitting method and modern lithium depletion boundary method. • Identification of stars in a period-colour diagram yields internal structure. • Works especially well in open clusters: • comparison with isochrones and LDB results can provide a statistically robust, distance-independent test of MS-models • Caveat emptor: binarity and differential rotation can cause problems. Barnes, S., (2003), ApJ, 586, 464 Barnes, S., (2003), ApJ, 586, 464

  5. Synoptic Surveys: Pros and Cons for Gyrochronology:

  6. Gyrochronology in NGC 6811: the Kepler View Meibom et al. 2011, ApJL accepted

  7. Rotation Periods, Gyrochronologyand Cluster Membership James, D.,et al. 2010, A&A, 515, 100

  8. KELT-like Synoptic Surveys: The Pleiades and Gyrochronology:

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