Figure 1: Observed chromospheric structures and their transverse motions. The observed structures can be considered as discrete over-dense MFTs outlining the magnetic field, embedded in a less ...

118, No. 840 (February 2006), pp. 227-235 (9 pages) ABSTRACT We present optical spectra of a flare on Barnard’s star. Several photospheric and chromospheric species were enhanced by the flare heating.