What lies beyond Exo-Jupiters? A High Resolution study of q¹ Eridani

ALMA Band 6 and 7 observations of the >1Gyr F9V star q1 Eri (HD10647, HR506) are presented, a system with a known ~2 au radial velocity planet and debris disk. These resolved images detect the broad debris disk, inclined by ~76deg to the plane of the sky with a maximum brightness at ~82 au. The emission is asymmetric; the flux is higher in the SW than the NE and the star is closer to the SW ansa. HST data are also presented which show that the scattered light is more radially extended in the NE. With modelling, we show the SW ansa asymmetry is broadly consistent with an extended clump on the inner edge of the disk. We assess the inner edge and clump as consistent with perturbations from an inner planet. If the modelled vertical aspect ratio is due to dynamical interactions in the disk, we constrain the size of perturbers and find these to be consistent with the lower limit on the maximum planetesimal size, estimated from the collisional lifetime of bodies in the disk.