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The Hipparcos satellite: a wealth of new astrophysical results.

Turon, C.

The European Space Agency satellite Hipparcos was the first satellite to accurately measure angular displacements on the sky. The mission results deal with a great variety of subjects: reference systems, stellar physics and evolution, galactic kinematics, dynamics and evolution, distance and age scale in the Universe. A selection of the most strik…

The Hipparcos satellite: a dramatic improvement in our knowledge of the solar neighbourhood.

Turon, C.

Hipparcos was the first satellite to accurately measure angular displacements on the sky. Thanks to its original design, positions, trigonometric parallaxes and proper motions of unprecedented accuracy have been obtained for about 118000 stars and 50 objects in the solar system. The results cover a wide variety of subjects: reference systems, stel…

First geometrical calibration of the period-luminosity relation of Cepheids from the HIPPARCOS satellite.

Turon, C.; Paturel, G.; Bottinelli, L. +5 more

A sample of the 36 nearest galactic Cepheids was measured with the HIPPARCOS satellite and supplied us with high precision geometrical parallaxes and accurate photometric data. These data are tested against ground based observations and used to determine the first "geometrical" calibration of the period-luminosity relation for nearby Cepheids. Thi…