| Issue |
A&A
Volume 374, Number 3, August II 2001
|
|
|---|---|---|
| Page(s) | 1085 - 1091 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20010816 | |
| Published online | 15 August 2001 | |
On the Wilson-Bappu relationship in the MgII k line
1
Istituto di Astrofisica Spaziale, CNR, Area di Ricerca Tor Vergata, Via del Fosso del Cavaliere 100, 00133 Roma, Italy
2
Dipartimento di Fisica E. Amaldi, Università degli Studi Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
Corresponding author: D. Cardini, cardini@ias.rm.cnr.it
Received:
28
March
2001
Accepted:
5
June
2001
An investigation is carried out on the Wilson-Bappu effect
in the Mgii k line at 2796.34 Å. 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 (-
). 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.
Key words: stars: distances / stars: late-type / ultraviolet: general / line: profiles / catalogs
© ESO, 2001
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