...stars
Based on observations collected at the European Southern Observatory (La Silla, Chile; ESO programmes Nos. 43.7-004, 44.7-012, 49.7-030, 50.7-067, 51.7-041, 52.7-063, 53.7-028, 54.E-0416, and 55.E-0751), at the Observatoire de Haute-Provence (Saint-Michel-l'Observatoire, France), at Kitt Peak National Observatory, and at the Canada-France-Hawaii Telescope.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...HREF="/articles/aas/full/1997/08/ds1257/footnode.html#206">
Tables 2, 3, and 4 are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...Landstreet
Visiting Astronomer, Canada-France-Hawaii Telescope operated by the National Research Council of Canada, the Centre National de la Recherche Scientifique de France and the University of Hawaii.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...Lanz
Visiting Astronomer, Kitt Peak National Observatory, National Optical Astronomy Observatories, operated by AURA Inc., under contract with the National Science Foundation.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...field
In the past, it was also often called effective field.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...2%
Note that the Landé factor of the upper level of 348#348  349#349 is known to an accuracy better than 0.009: that is, the uncertainty that it introduces in the field measurements does not exceed 0.3%.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...Sect. 4
The use of 369#369 to characterize the strength of the magnetic field of the studied stars, even when the phase coverage achieved with the presently available observations is incomplete, is justified by the fact that the relative amplitudes of variation of the mean field modulus of most stars are small (see below).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...view
That is, provided that the sum of the angles i (between the stellar rotation axis and the line of sight) and 408#408 (between the magnetic and rotation axes) is greater than 90409#409.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...moments
Note also that the curves of variation of the longitudinal field of HD 81009 and of HD 126515 are not symmetric about their extrema, although the field modulus curves of those stars have that symmetry (see Sects. 5.15 and 5.22).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

Copyright by the European Southern Observatory (ESO)
web@ed-phys.fr