Mg II K line Wilson-Bappu relationship (Cassatella+, 2001)

Details Mg II K line Wilson-Bappu relationship (Cassatella+, 2001) Mg II K line Wilson-Bappu relationship (Cassatella+, 2001)

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..33741085c&link_type=abstract

VizieR On-line Data Catalog: J/A+A/374/1085. Originally published in: 2001A&A...374.1085C

Physics

Stars: Distances, Line Profiles, Ultraviolet

Scientific paper

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. (1 data file).

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