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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…
Orbital Architectures of Planet-Hosting Binaries: I. Forming Five Small Planets in the Truncated Disk of Kepler-444A
Trent J. Dupuy, Kaitlin M. Kratter, Adam L. Kraus +5
We present the first results from our Keck program investigating the orbital architectures of planet-hosting multiple star systems. Kepler-444 is a metal-poor triple star system th…
The Palomar Kernel Phase Experiment: Testing Kernel Phase Interferometry for Ground-based Astronomical Observations
Benjamin Pope, Peter Tuthill, Sasha Hinkley +5
At present, the principal limitation on the resolution and contrast of astronomical imaging instruments comes from aberrations in the optical path, which may be imposed by the Eart…
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…
First Light Results from the Hermes Spectrograph at the AAT
Andrew Sheinis, Borja Anguiano, Martin Asplund +60
The High Efficiency and Resolution Multi Element Spectrograph, HERMES, is a facility-class optical spectrograph for the Anglo-Australian Telescope (AAT). It is designed primarily f…
Resolving asymmetries along the pulsation cycle of the Mira star X Hya
X. Haubois, M. Wittkowski, G. Perrin +6
The mass-loss process in Mira stars probably occurs in an asymmetric way where dust can form in inhomogeneous circumstellar molecular clumps. Following asymmetries along the pulsat…