Absence of Rapid Line Variations in Consecutive FEROS and NARVAL Spectra of Maia

Abstract

The comparison of four consecutive high signal-to-noise FEROS spectra of Maia, the fourth brightest member of the Pleiades open cluster, taken over 10 minutes, reveals no real line variations. The analysis of four consecutive I NARVAL profiles of Maia taken over 18 minutes does not show variations either. In particular, the five lines of He\u2009i at 4471.48\u2009Å are constant over this timescale in both sets of data. The He\u2009i line at 3926.54\u2009Å is very broad and diffuse compared to other photospheric lines of Maia.