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Local Variations of the Velocity Ellipsoid

Published online by Cambridge University Press:  25 May 2016

M. Moreno ,
J. Torra  and
E. Oblak
M. Moreno
Affiliation:
Dep. Fsica i Enginyeria Nuclear, Universitat Politècnica de Catalunya (Spain) [[email protected]]
J. Torra
Affiliation:
Dep. d'Astronomia i Meteorologia, Universitat de Barcelona (Spain)
E. Oblak
Affiliation:
Observatoire de Besançon (France)

Extract

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We have analyzed the distribution of residual velocities of nearby stars (within 200 pc of the Sun) looking for space variations on the velocity ellipsoid. We used a sample of 1071 main sequence stars of spectral types B, A and F selected from the Hipparcos Input Catalogue [7] with uvbyHβ photometric data. Ages have been calculated following [1]. Six subsamples with 8.07 ≤ log(age) ≤ 9.45 have been considered.

Type
Chapter 6: How are we to Understand the Large Scale Structure of the ISM?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 525 - 526
Copyright
Copyright © Kluwer 1996 

References

1. Asian, R. (1993), Degree in Physics , Universitat de Barcelona Google Scholar
2. Mayor, M. (1970), A&A 6, 60 Google Scholar
3. Menge de Freitas, S. (1982), A&A Suppl. Ser. 49, 687 Google Scholar
4. Moreno, M., Torra, J. (1989), in Errors, bias and uncertainties in Astronomy Jaschek, C. and Murtagh, F. (eds.), Cambridge University Press, p. 377 Google Scholar
5. Oblak, E. (1983), A&A 123, 238 Google Scholar
6. Oblak, E., Moreno, M., Torra, J. (1993), in Workshop on Databases for Galactic Structure , Swarthmore (USA) (in press) Google Scholar
7. Turon, C. and 53 collaborators (1992), The Hipparcos Input Catalogue, ESA SP-1136 Google Scholar