GM Aurigae's SED GM Aurigae's spectral energy distribution (SED). The dotted line is the input stellar spectrum, the open squares are data points, and the solid line is the computed SED using the density profile of a disc with an embedd 1.7 Jupiter mass planet. The dashed line shows the SED in the absence of a gap and with the disc extending in to 7 stellar radii. It is clear that the presence of a gap reduces the near infra-red flux (2 - 10 microns) and slightly increases the flux at longer wavelengths (20 microns).