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J/A+A/374/1085      Mg II K line Wilson-Bappu relationship   (Cassatella+, 2001)

On the Wilson-Bappu relationship in the Mg II K line Cassatella A., Altamore A., Badiali M., Cardini D. <Astron. Astrophys. 374, 1085 (2001)> =2001A&A...374.1085C
ADC_Keywords: Stars, distances ; Line Profiles ; Ultraviolet Keywords: stars: distances - stars: late-type - ultraviolet general - line: profiles - catalogue Abstract: An investigation is carried out on the Wilson-Bappu effect in the MgII K line at 2796.34Å. The work is based on a selection of 230 stars observed by both the IUE and HIPPARCOS satellites, covering a wide range of spectral types (F to M) and absolute visual magnitudes (-5.4≤MV≤9.0). A semi-automatic procedure is used to measure the line widths, which applies also in the presence of strong central absorption reversal. The Wilson-Bappu relationship here provided is considered to represent an improvement over previous recent results for the considerably larger data sample used, as well as for a proper consideration of the measurement errors. No evidence has been found for a possible dependence of the WB effect on stellar metallicity and effective temperature. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea.dat 75 303 On the Wilson-Bappu relationship in the Mg II K line: the final data base tablea.tex 127 389 LaTeX version of tablea.dat
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) Byte-by-byte Description of file: tablea.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP Hipparcos (Cat. I/239) number 8 A1 --- n_B-V [*] B-V flag (blank if B-V value from Hipparcos, '*' else) 10- 18 A9 --- Name HD or other identifier 20- 31 A12 --- SpType Spectral type and luminosity class 33- 38 F6.3 mag VMAG Absolute V magnitude (1) 40- 44 F5.3 mag e_VMAG rms uncertainty on VMAG (1) 46- 50 F5.3 mag B-V B-V colour index 52- 55 F4.3 mag e_B-V rms uncertainty on B-V 57- 64 A8 --- IUE IUE Image 66- 70 F5.3 [km/s] logW0 logarithm of width half-maximum of the Mg II K line (2) 72- 75 F4.3 [km/s] e_logW0 rms uncertainty on logW0
Note (1): The absolute magnitudes were computed without any allowance for interstellar reddening. The errors have been derived from the errors in trigonometric parallaxes assuming a typical error of 0.01mag in the observed visual magnitudes. Note (2): Full width half maximum after quadratic subtraction of instrumental width b: W02 = W2 - b2
Acknowledgements: Daniela Cardini History : 3 names corrected on 30-Aug-2001
(End) Patricia Bauer [CDS] 19-Jun-2001
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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