A Search for Circumstellar Dust Disks Around DBZ and DZ White Dwarfs

Details A Search for Circumstellar Dust Disks Around DBZ and DZ White Dwarfs A Search for Circumstellar Dust Disks Around DBZ and DZ White Dwarfs

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70055j&link_type=abstract

Spitzer Proposal ID #70055

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Scientific paper

We propose to observe 14 heavily polluted helium white dwarfs (DBZs and DZs) to search for dust disks. With current data, it appears that even when controlled for the same amount of accreted mass, cooler stars do not possess circumstellar dust. Is this an artifact of small number statistics or is there a real variation in the physical composition of parent bodies that white dwarfs accrete? Perhaps younger white dwarfs are contaminated by robust asteroid analogues while older white dwarfs accrete fragile materials from Kuiper Belt-like objects.

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