Velocity Space of Galactic O-B Stars

Details Velocity Space of Galactic O-B Stars Velocity Space of Galactic O-B Stars

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006chjaa...6..363z&link_type=abstract

Chinese Journal of Astronomy and Astrophysics, Volume 6, Issue 3, pp. 363-371 (2006).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Based on the Hipparcos proper motions and available radial velocity data of O-B stars, we have re-examined the local kinematical structure of the young disk population of ~1500 O-B stars not including the Gould-belt stars. A systematic warping motion of the stars about the direction to the Galactic center has been reconfirmed. A negative K-term implying a systematic contraction of stars in the solar vicinity has been detected. Two different distance scales are used in order to find out their impact on the kinematical parameters, and we conclude that the adopted distance scale plays an important role in characterizing the kinematical parameters at the present level of the measurement uncertainty.

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