First Steps Toward the Determination of the Escape Velocity in the Solar Neighbourhood

Details First Steps Toward the Determination of the Escape Velocity in the Solar Neighbourhood First Steps Toward the Determination of the Escape Velocity in the Solar Neighbourhood

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..591m&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 591-594

Astronomy and Astrophysics

Astronomy

10

Scientific paper

Hipparcos parallaxes and proper motions, combined with radial velocities from CORAVEL, allow the space velocities of several thousands of stars to be determined with unprecedented accuracy. A detailed analysis of the errors, taking into account the correlations between the astrometric parameters (positions, parallaxes and proper motions) for each star, is developed. The escape velocity is then estimated following the method first developed by Leonard and Tremaine (1990).

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