Astronomical Unit (AU) scales. Methods. Using AMBER/VLTI at a spectral resolution we
spatially resolve the emission in both the line and the adjacent continuum. Results. The
visibility does not vary between the continuum and the line, even though the line is strongly
detected in the spectrum, with a peak intensity 35% above the continuum. This demonstrates
that the line and continuum emission have similar size scales. We assume that the K-band …