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ALMA Cycle 0 and Herschel PACS observations are reported for the prototype,nearest, and brightest example of a dusty and polluted white dwarf, G29-38.These long wavelength programs attempted to detect an outlying, parentpopulation of bodies at 1-100 AU, from which originates the disruptedplanetesimal debris that is observed within 0.01 AU and which exhibits L_IR/L =0.039. No associated emission sources were detected in any of the data down toL_IR/L ~ 1e-4, generally ruling out cold dust masses greater than 1e24 - 1e25 gfor reasonable grain sizes and properties in orbital regions corresponding toevolved versions of both asteroid and Kuiper belt analogs. Overall, these nulldetections are consistent with models of long-term collisional evolution inplanetesimal disks, and the source regions for the disrupted parent bodies atstars like G29-38 may only be salient in exceptional circumstances, such as arecent instability. A larger sample of polluted white dwarfs, targeted with thefull ALMA array, has the potential to unambiguously identify the parentsource(s) of their planetary debris.

ALMA and Herschel Observations of the Prototype Dusty and Polluted White Dwarf G29-38