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Astrometric tests of General Relativity in the Solar System: mathematical and computational scenarios
Alberto Vecchiato, Mario Gai, Mario G. Lattanzi +3
We review the mathematical models available for relativistic astrometry, discussing the different approaches and their accuracies in the context of the modern experiments from spac…
Parallaxes of five L Dwarfs with a Robotic Telescope
Y. Wang, H. R. A. Jones, R. L. Smart +14
We report the parallax and proper motion of five L dwarfs obtained with observations from the robotic Liverpool Telescope. Our derived proper motions are consistent with published…
An Earth-sized planet with an Earth-like density
Francesco Pepe, Andrew Collier Cameron, David W. Latham +31
Kepler-78 (KIC 8435766) was identified by Sanchis-Ojeda et al. (2013) as harbouring a transiting planet of 1.16 times the size of the Earth and an orbital period of only 8.5 hours.…
Astrometric Detection of Giant Planets Around Nearby M Dwarfs: The Gaia Potential
A. Sozzetti, P. Giacobbe, M. G. Lattanzi +3
[abridged] We carry out numerical simulations to gauge the Gaia potential for precision astrometry of exoplanets orbiting a sample of known dM stars within 30 pc from the Sun. (1)…
A Combined Astrometric and Spectroscopic Study of Metal-Poor Binaries
Lisa Benamati, Alessandro Sozzetti, Nuno C. Santos +1
In this work we present a study of binary systems in a metal-poor sample of solar type stars. The stars analyzed were rejected from two planet search samples because they were foun…
Parallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets
F. Marocco, A. H. Andrei, R. L. Smart +8
We present near-infrared spectroscopy for 52 ultracool dwarfs, including two newly discovered late-M dwarfs, one new late-M subdwarf candidate, three new L and four new T dwarfs. W…