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Extended atmospheres of AGB stars: modeling and measurement
Michael J. Ireland
Encoded in the time- and wavelength dependent properties of pulsating AGB stars are the underlying fundamental parameters of mass, composition and evolutionary state. However, the…
Establishing Alpha Oph as a Prototype Rotator: Improved Astrometric Orbit
Sasha Hinkley, John D. Monnier, Ben R. Oppenheimer +24
The nearby star Alpha Oph (Ras Alhague) is a rapidly rotating A5IV star spinning at ~89% of its breakup velocity. This system has been imaged extensively by interferometric techniq…
Photonic Technologies for a Pupil Remapping Interferometer
Peter Tuthill, Nemanja Jovanovic, Sylvestre Lacour +9
Interest in pupil-remapping interferometry, in which a single telescope pupil is fragmented and recombined using fiber optic technologies, has been growing among a number of groups…
Sparse Aperture Masking (SAM) at NAOS/CONICA on the VLT
Peter Tuthill, Sylvestre Lacour, Paola Amico +8
The new operational mode of aperture masking interferometry has been added to the CONICA camera which lies downstream of the Adaptive Optics (AO) corrected focus provided by NAOS o…
Asteroseismology of Solar-type stars with Kepler III. Ground-based Data
Joanna Molenda-Zakowicz, Hans Bruntt, Sergio Sousa +15
We report on the ground-based follow-up program of spectroscopic and photometric observations of solar-like asteroseismic targets for the Kepler space mission. These stars constitu…
A Close Companion Search around L Dwarfs using Aperture Masking Interferometry and Palomar Laser Guide Star Adaptive Optics
David Bernat, Antonin H. Bouchez, Michael Ireland +22
We present a close companion search around sixteen known early-L dwarfs using aperture masking interferometry with Palomar laser guide star adaptive optics. The use of aperture mas…