Fig. 5.
Radial velocity curve of the observed emission lines and the TiO absorption. Top panel: Balmer lines: FORS2 Hα measurements are marked by black filled circles, FORS1 Hα measurements by empty circles, and FORS1 Hβ measurements by empty squares. Middle panel: radial velocity of the three HeI emission lines as measured in the FORS2 spectra. Bottom panel: radial velocity measurements of TiO bandhead (black triangles), NaI D emission (black circles), FeII 5169 blending with MgI (crosses), and MgI 5183 (empty squares).
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