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Dynamical Masses of Young Stars I: Discordant Model Ages of Upper Scorpius
Aaron C. Rizzuto, Michael J. Ireland, Trent J Dupuy +1
We present the results of a long term orbit monitoring program, using sparse aperture masking observations taken with NIRC2 on the Keck-II telescope, of seven G to M-type members o…
Mapping the shores of the brown dwarf desert. IV. Ophiuchus
Anthony C. Cheetham, Adam L. Kraus, Michael J. Ireland +3
We conduct a multiplicity survey of members of the rho Ophiuchus cloud complex with high resolution imaging to characterize the multiple star population of this nearby star forming…
New Pre-main-Sequence Stars in the Upper Scorpius Subgroup of Sco-Cen
A. C. Rizzuto, M. J. Ireland, A. L. Kraus
We present 237 new spectroscopically confirmed pre-main-sequence K and M-type stars in the young Upper Scorpius subgroup of the Sco-Cen association, the near- est region of recent…