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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…
On the coexistence of stellar-mass and intermediate-mass black holes in globular clusters
Nathan W. C. Leigh, Nora Luetzgendorf, Aaron M. Geller +3
In this paper, we address the question: What is the probability of stellar-mass black hole (BH) binaries co-existing in a globular cluster with an intermediate-mass black hole (IMB…
The Blue Stragglers of the Old Open Cluster NGC 188
Robert D. Mathieu, Aaron M. Geller
The old (7 Gyr) open cluster NGC 188 has yielded a wealth of astrophysical insight into its rich blue straggler population. Specifically, the NGC 188 blue stragglers are characteri…
Detection of white dwarf companions to blue stragglers in the open cluster NGC 188: direct evidence for recent mass transfer
Natalie M. Gosnell, Robert D. Mathieu, Aaron M. Geller +3
Several possible formation pathways for blue straggler stars have been developed recently, but no one pathway has yet been observationally confirmed for a specific blue straggler.…