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Blue Dots Team Transits Working Group Review
A. Sozzetti, C. Afonso, R. Alonso +9
Transiting planet systems offer an unique opportunity to observationally constrain proposed models of the interiors (radius, composition) and atmospheres (chemistry, dynamics) of e…
Detecting and characterizing extrasolar planetary systems with astrometry: review from the Blue Dots astrometry working group
F. Malbet, A. Sozzetti, P. Lazorenko +8
The astrometry technique is an important tool for detecting and characterizing exoplanets of different type. In this review, the different projects which are either operating, in c…
The Gaia Astrometric Survey
A. Sozzetti
In its all-sky survey, the ESA global astrometry mission Gaia will perform high-precision astrometry and photometry for 1 billion stars down to mag. The data collected in…
Hipparcos preliminary astrometric masses for the two close-in companions to HD 131664 and HD 43848. A brown dwarf and a low mass star
A. Sozzetti, S. Desidera
[abridged] We attempt to improve on the characterization of the properties (orbital elements, masses) of two Doppler-detected sub-stellar companions to the nearby G dwarfs HD 13166…
Detectability of Terrestrial Planets in Multi-Planet Systems: Preliminary Report
Wesley A. Traub, Charles Beichman, Andrew F. Boden +21
We ask if Earth-like planets (terrestrial mass and habitable-zone orbit) can be detected in multi-planet systems, using astrometric and radial velocity observations. We report here…
A Keck HIRES Doppler Search for Planets Orbiting Metal-Poor Dwarfs. II. On the Frequency of Giant Planets in the Metal-Poor Regime
A. Sozzetti, G. Torres, D. W. Latham +5
We present an analysis of three years of precision radial velocity measurements of 160 metal-poor stars observed with HIRES on the Keck 1 telescope. We report on variability and lo…
Detection and Characterization of Planetary Systems with as Astrometry
A. Sozzetti
Astrometry as a technique has so far proved of limited utility when employed as either a follow-up tool or to independently search for planetary mass companions orbiting nearby sta…