Cluster Membership, Binarity and Stellar Rotation in the Young Open Cluster M37

Type Conference Paper
Names Aaron M. Geller, S. Meibom, S. Barnes, R. D. Mathieu, J. Hartman, M. Holman
Conference Name American Astronomical Society Meeting Abstracts #220
Volume 220
Date May 1, 2012
Library Catalog NASA ADS
Abstract We present results from our comprehensive radial-velocity survey of the young open cluster M37 (NGC 2099; 540 Myr). This ongoing survey began in 2007 and combines data from the MMT 6.5m telescope and the WIYN 3.5m telescope as part of the WIYN Open Cluster Study (WOCS). Our stellar sample covers all upper main-sequence stars down to 5.5 magnitudes below the turnoff (11 < V < 18.5; 2.8 < M [M&sun;] < 0.8) and spans a 30’ x 25’ (11 x 13 pc; 4.8 x 5.7 core radii) region on the sky. To date we have observed 1717 stars, 895 of which have at least 3 radial-velocity measurements. Here we identify 545 single and binary cluster members, and present a color-magnitude diagram cleaned from field-star contamination. Importantly many of these stars also have rotation-period measurements, allowing for a comparison of the stellar rotation rates between the single and binary cluster members. This work is funded by the National Science Foundation grant AST-0908082 to the University of Wisconsin - Madison, the Lindheimer Fellowship at Northwestern University, NASA grant NNX09AH18A to S.M., and by support to S.M. from the Kepler mission via NASA Cooperative Agreement NCC2-1390.
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