000002729 001__ 2729
000002729 005__ 20160701171710.0
000002729 037__ $$aASTROimport-886
000002729 100__ $$aGebran, M.
000002729 245__ $$aMicroturbulence in A/F Am/Fm stars
000002729 260__ $$c2014
000002729 520__ $$aA programme to observe all the A dwarfs brighter than V = 6.5 mag in open clusters of various ages, and also in the field, was initiated several years ago. We carried out high-resolution, high signal-to-noise spectroscopy of stars well distributed in mass along the main sequence. This paper presents a current status of results for microturbulent velocities for A and F dwarfs. Microturbulent velocities were derived iteratively by fitting grids of synthetic spectra, calculated for LTE, to observations of 61 A-type field stars, and to 55 A and 58 F stars in the open clusters Pleiades, Coma, Hyades, and the Ursa Major moving group. We compared our results to recent ones, and found a good agreement with analytical formulations for standard microturbulence. Our results also indicate a broad maximum in microturbulent velocity across the range A5V to about A9V, and decreasing to ˜ 1 km s^{-1} for cooler and hotter stars, as also found by Smalley 	te{Smalley2004}. We also compare our results with the preliminary ones by Lobel et al. te{Lobel2013} from the Gaia-ESO Public Spectroscopic Survey. 
000002729 700__ $$a Monier, R.
000002729 700__ $$a Royer, F.
000002729 700__ $$a Lobel, A.
000002729 700__ $$a Blomme, R.
000002729 773__ $$c193-198$$pPutting A Stars into Context: Evolution, Environment, and Related Stars$$y2014
000002729 85642 $$ahttp://esoads.eso.org/abs/2014psce.conf..193G
000002729 905__ $$apublished in
000002729 980__ $$aNONREF