Cold Dust in Kepler's Supernova Remnant

The timescales to replenish dust from the cool, dense winds of AsymptoticGiant Branch stars are believed to be greater than the timescales for dustdestruction. In high redshift galaxies, this problem is further compounded asthe stars take longer than the age of the Universe to evolve into the dustproduction stages. To explain these discrepancies, dust formation in supernovae(SNe) is required to be an important process but until very recently dust insupernova remnants has only been detected in very small quantities. We presentthe first submillimeter observations of cold dust in Kepler's supernova remnant(SNR) using SCUBA. A two component dust temperature model is required to fitthe Spectral Energy Distribution (SED) with $T_{warm} \sim 102$K and $T_{cold}\sim 17$K. The total mass of dust implied for Kepler is $\sim 1M_{\odot}$ -1000 times greater than previous estimates. Thus SNe, or their progenitors maybe important dust formation sites.Comment: 12 pages, 2 figures, accepted to ApJL, corrected proof