Investigating the Architecture and Collisional State of Four Nearby Debris Disks with PACS/SPIRE Imaging

We propose sensitive PACS and SPIRE imaging photometry of four stars with important debris disks yet to be imaged with Herschel. Two of these stars (EF Cha and HD 165014) have warm debris disks *and* complex midIR spectral structures that provide evidence for critical terrestrial planet formation processes: the formation of large, differentiated bodies and terrestrial water delivery. Two (HD 15115 and HD 61005) have colder, extended Kuiper beltlike disks with newly discovered structures likely induced by massive jovian planets. Our PACS imaging of the first sample will help determine whether these terrestrial planetforming systems also have Kuiper belts, features crucial to interpreting the planetforming potential of these systems. Our PACS/SPIRE imaging of HD 15115 and HD 61005 will spatially resolve their disks to identify additional signatures of embedded planets and will constrain the disk farIR slope and thus shed light on the collisional states of two debris disks perturbed by a planets. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]