SIMBAD references

1998A&A...336..953G - Astronomy and Astrophysics, volume 336, 953-959 (1998/8-3)

The HR-diagram from Hipparcos data. Absolute magnitudes and kinematics of Bp-Ap stars.

GOMEZ A.E., LURI X., GRENIER S., FIGUERAS F., NORTH P., ROYER F., TORRA J. and MENNESSIER M.O.

Abstract (from CDS):

The HR-diagram of about 1000 Bp-Ap stars in the solar neighbourhood has been constructed using astrometric data from Hipparcos satellite as well as photometric and radial velocity data. The LM method (Luri 1995, Ph.D. Thesis, Universitat of Barcelona, Luri et al., 1996A&AS..117..405L) allows the use of proper motion and radial velocity data in addition to the trigonometric parallaxes to obtain luminosity calibrations and improved distances estimates. Six types of Bp-Ap stars have been examined: He-rich, He-weak, HgMn, Si, Si+ and SrCrEu. Most Bp-Ap stars lie on the main sequence occupying the whole width of it (about 2mag), just like normal stars in the same range of spectral types. Their kinematic behaviour is typical of thin disk stars younger than about 1Gyr. A few stars found to be high above the galactic plane or to have a high velocity are briefly discussed.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: distances - stars: fundamental parameters - stars: Hertzsprung-Russell (HR) diagram - stars: kinematics

VizieR on-line data: <Available at CDS (J/A+A/336/953): table3.dat table4.dat>

Simbad objects: 953

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