83 citations · 275 across the 8 of their papers we have counts for
8 papers
WIYN Open Cluster Study. XC. Barium Surface Abundances of Blue Straggler Stars in the Open Clusters NGC 7789 and M67
Andrew C. Nine, Robert D. Mathieu, Simon C. Schuler +1
We investigate barium (Ba) abundances in blue straggler stars (BSSs) in two open clusters, NGC 7789 (1.6 Gyr) and M67 (4 Gyr), as signatures of asymptotic-giant-branch (AGB) mass t…
WIYN Open Cluster Study. LXXVII. Radial-Velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 7789
Andrew C. Nine, Katelyn E. Milliman, Robert D. Mathieu +4
We introduce the stellar sample of the WIYN Open Cluster Study radial-velocity survey for the rich open cluster NGC 7789 (1.6 Gyr, [Fe/H] = +0.02). This sample lies within an 18…
WIYN Open Cluster Study. LXXI. Spectroscopic Membership and Orbits of NGC 6791 Sub-Subgiants
Katelyn E. Milliman, Emily Leiner, Robert D. Mathieu +2
In an optical color-magnitude diagram sub-subgiants (SSGs) lie red of the main sequence and fainter than the base of the red giant branch in a region not easily populated by standa…
Determining the Age of the Kepler Open Cluster NGC 6819 With a New Triple System and Other Eclipsing Binary Stars
Lauren N. Brewer, Eric L. Sandquist, Robert D. Mathieu +10
As part of our study of the old (~2.5 Gyr) open cluster NGC 6819 in the Kepler field, we present photometric (Kepler and ground-based BVRcIc) and spectroscopic observations of the…
Barium Surface Abundances of Blue Stragglers in the Open Cluster NGC 6819
Katelyn E. Milliman, Robert D. Mathieu, Simon C. Schuler
We present the barium surface abundance of 12 blue stragglers (BSs) and 18 main-sequence (MS) stars in the intermediate-age open cluster NGC 6819 (2.5 Gyr) based on spectra obtaine…
WIYN Open Cluster Study. LX. Spectroscopic Binary Orbits in NGC 6819
Katelyn E. Milliman, Robert D. Mathieu, Aaron M. Geller +3
We present the current state of the WOCS radial-velocity (RV) survey for the rich open cluster NGC 6819 (2.5 Gyr) including 93 spectroscopic binary orbits with periods ranging from…
WOCS 40007: A Detached Eclipsing Binary near the Turnoff of the Open Cluster NGC 6819
Mark W. Jeffries, Eric L. Sandquist, Robert D. Mathieu +10
We analyze extensive BVR_cI_c time-series photometry and radial-velocity measurements for WOCS 40007 (Auner 259; KIC 5113053), a double-lined detached eclipsing binary and a member…
A Long-Period Totally Eclipsing Binary Star at the Turnoff of the Open Cluster NGC 6819 Discovered with Kepler
Eric L. Sandquist, Robert D. Mathieu, Karsten Brogaard +11
We present the discovery of the totally eclipsing long-period (P = 771.8 d) binary system WOCS 23009 in the old open cluster NGC 6819 that contains both an evolved star near centra…