Cool Stars 14 - Submitted Abstract # 403 This version created on 23 October 2006 On the circumstellar environment of brown dwarfs in Taurus S. Guieu C. Pinte J.-L. Monin F. Menard M. Fukagawa D. Padgett A. Noriega-Crespo S. Carey L. Rebull T. Huard We study the presence of disks around BDs in the Taurus cloud, and discuss implications for substellar formation models. We use photometric measurements from the visible domain to the Spitzer far infrared to determine the Spectral Energy Distribution of Taurus BD, plus model fitting of these distributions and colors. We compute color indexes and determine disk models fits to estimate the physical parameters of the disks around BD. We find that ? 50% of all BDs have a disk but BD with and without disks are not distributed regularly across the Taurus cloud. Conclusions. We find that 48%+/- 17% of Taurus BDs have a circumstellar disk signature, a ratio similar to recent results from previous authors in other regions . We fit the BDs SED and find that none of the disks around BDs in Taurus can be fitted convincingly with a flaring index beta = 0. indicating that the disks we observe retain a significant amount of gas. We find that BD with disks are proportionally more numerous in one of the Taurus filaments, the northern one, possibly the youngest. We do not find the same segregation for CTTS and WTTS, suggesting that superimposed on the evolution effect, the segregation effect is related to the mass of the objects. A by-product of our study is to propose a recalibration of the Barrado y Navascues & Martin (2003) accretion limit in the substellar domain. The global shape of the limit fits our data points if it is raised by a factor 1.25-1.30. ----------------------------------