Description |
Dusty disks around hot (Teff > 100,000 K) white dwarfs are a new phenomenon discovered by Spitzer. The origin of such a disk is still in debate. We propose to obtain far-infrared photometry for 6 dusty disks around hot WDs identified from our Spitzer 24 micron survey. The Herschel far-infrared measurements will provide strong constraints on the outer boundary of the disk and its total dust mass in the system, crucial information necessary to differentiate the origin of the disks. |