CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): GOMEZ, A.E.; LURI, X.; SABAS, V.; GRENIER, S.; FIGUERAS, F.; NORTH, P.;
TORRA, J.; MENNESSIER, M.O.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 171-178.
- Date: 04/1998
- Title: Absolute magnitudes and kinematics of CP stars from Hipparcos data
- Keyword(s): STARS: CHEMICALLY PECULIAR, HETZSPRUNG-RUSSELL(HR) DIAGRAM,
STARS: KINEMATICS
- Pages: 171 -- 178
Abstract:
The position in the HR diagram and the kinematic characteristics of
different kinds of CP stars of the upper main sequence are obtained using
the LM method of Luri et al. Most of the CP stars are main sequence
stars occupying the whole width of the sequence. From a kinematic point
of view, they belong to the young disk population (ages < 1.5 Gyr).
It has also been found that, on kinematic grounds, the behaviour
of Lambda Bootis stars is similar to the one observed for normal stars
of the same spectral range. On the other hand, roAp and noAp stars
show the same kinematic characteristics. The peculiar velocity distribution
function has been decomposed into a sum of three dimensional gaussians
and the presence of Pleiades, Sirius and Hyades moving groups has been
clearly established. Finally, a small number of CP stars are found to be
high-velocity objects.
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