Abstract
To investigate the physical nature of the observed deciency of stars in the very center of the Ursa Minor Dwarf Spheroidal galaxy, we recently obtained JCMT-SCUBA 850 m photometry of this region. The observed void could be explained by0.5 mag of extinction. While the amount of dust needed to produce such absorption (under certain assumptions for the dust temperature and the exponent in the dust emissivity term) would yield a 5 mJy signal { easily detectable by SCUBA { we found no signal at 850 m, after 256 min of integration. This nding rules out the presence of a few solar masses of cold dust cloud as the explanation for the central lack of stars observed in Ursa Minor. We discuss possible explanations.
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