J/A+A/336/953 Bp-Ap stars HR-diagram from Hipparcos data (Gomez+ 1998)
The HR diagram form 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., Mennessier M.O.
<Astron. Astrophys. 336, 953 (1998)>
=1998A&A...336..953G 1998A&A...336..953G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Ap ; Stars, Bp ; Stars, distances ; Magnitudes, absolute
Keywords: stars: chemically peculiar - stars: distances -
stars: fundamental parameters - Hertzsprung-Russell (HR) diagram -
stars: kinematics
Description:
Using Hipparcos (Cat. I/239) parallaxes and proper motions together
with radial velocity data, the luminosity calibration and kinematics
of Bp-Ap stars have been obtained. The used statistical method allows
to treat inhomogeneous samples and to identify the different groups.
Six types of Bp-Ap stars (He-rich, He-weak, Hg-Mn, Si, Si+ and SrCrEu)
have been considered. In most of the samples, with the exception of
the He-rich and He-weak stars, two groups have been separated.
Individual distances and luminosities are given for the stars
belonging to the main groups which contain the largest number of
stars. The list of stars in the secondary groups is given
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 50 924 Individual estimations for main group stars
table4.dat 30 26 List of stars in the secondary groups
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIPPARCOS (Cat. I/239) number
8- 13 I6 --- HD ? HD (Cat. III/135) number
15- 19 F5.1 % Prob Probability of belonging to the group
22- 24 I3 pc Dist Distance
26- 28 I3 pc e_Dist Distance error
30- 34 F5.2 mag Vmag Apparent V-magnitude
36- 39 F4.1 mag MVmag Absolute visual magnitude
41- 49 A9 --- Class Spectral Classification
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIPPARCOS (Cat. I/239) number
8- 13 I6 --- HD ? HD (Cat. III/135) number
15- 19 F5.1 % Prob Probability of belonging to the group
21- 26 A6 --- Class Spectral Classification
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Acknowledgements: Anita Gomez
(End) Patricia Bauer [CDS] 03-Aug-1998