Statistical effects from Hipparcos astrometry (2009)
Abstract. The Hipparcos astrometry is used mainly for the derivation of stellar physical quantities such as luminosity, masses and velocity. However, sample selections on data with observational...
Simulations of perspective acceleration for GAIA (2009)
Frédéric Arenou, Misha Haywood
gp = −2.046 10 −9 µπVR where µ is the proper motion in mas/yr, π is the parallax in mas and VR in km/s. At the half of the mission, the corresponding effect on position is ɛp = 1 t gp( 2 2)2...
Seven SB2 masses using Hipparcos intermediate astrometric data (2009)
Frédéric Arenou, Jean-louis Halbwachs, Michel Mayor, Julienne Palasi
The spectroscopic orbital elements of seven doublelined spectroscopic binaries have been combined to the Hipparcos astrometric data. Dynamical masses and magnitude differences are determined with a...
ASTRONOMY AND ASTROPHYSICS Revisiting Hipparcos data for pre-main sequence stars ⋆ (2009)
Claude Bertout, Noël Robichon, Frédéric Arenou
A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are:
Gaia Data Reduction Tasks for Double and Multiple Stars (2008)
Frédéric Arenou, Staffan Söderhjelm
As a result of the different instruments on-board Gaia and their various spatial or time resolutions, millions of Double and Multiple Stars (DMS) will be detected, of almost every kind. Accordingly,...
Planetary mass limits using Hipparcos astrometry (2008)
Frédéric Arenou, Julienne Palasi
Abstract. Using Hipparcos and Tycho-2 data, together with the radial velocity information, a statistical analysis is applied to all the orbital solutions of planetary candidates, in order to avoid a...
THE GAIA ON-BOARD SCIENTIFIC DATA HANDLING (2008)
Frédéric Arenou, Carine Babusiaux, Fabien Chéreau, Shan Mignot
Because Gaia will perform a continuous all-sky survey at a medium (Spectro) or very high (Astro) angular resolution, the on-board processing needs to cope with a high variety of objects and densities...
Simulations of perspective acceleration for GAIA (2007)
Frédéric Arenou, Misha Haywood
the solar neighbourhood, and to population II stars at larger distance. The simulation was done up to 300 pc, but 1 Simulations of perspective acceleration for GAIA Revision: 1.2 2 simulations on...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Gaia duplicity detection: photocentric binaries (2001)
Thanks to its broad band photometric measurements, Gaia may be also able to detect binaries separated by a few milliarcseconds, with magnitude differences between 1 and 5 mag. Together with the...
Gaia brown dwarfs and binary detections through timing orbits (2001)
Duplicity detection may also be done through the analysis of the light curves of variable stars. A light-time effect due to 10 Jupiter mass companions with period> 11 yr may be tested on more than...
ASTRONOMY AND ASTROPHYSICS HD 209458 planetary transits from Hipparcos photometry ⋆ (1999)
Noël Robichon, Frédéric Arenou
A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are:
Simulations et algorithmes de détection pour Gaia (1999)
Frédéric Arenou, Carine Babusiaux
Dans le cadre de la préparation de Gaia, nous décrivons un outil de simulations d’images et le développement d’un algorithme de détection d’objets dans les CCD astrométriques “repéreurs...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...
Les parallaxes trigonométriques du satellite Hipparcos vont considérablement modifier de nombreux domaines de l'Astronomie. Leur précision annoncée (un facteur 5 par rapport à celles obtenues au...