Speaker
Description
We present a deep, blind, HI survey of the Fornax galaxy cluster carried out with the Australian Telescope Compact Array (ATCA). The Fornax galaxy cluster is significantly different from the well studied Virgo cluster, as the density of the intra-cluster medium and the velocity dispersion of Fornax are a factor of 2 lower, while the galaxy number is twice as large. These conditions enable the HI in in-falling, gas rich dwarfs galaxies to survive longer than in other clusters, providing us with a good opportunity to measure the properties of the HI in the cluster including pre-processing mechanisms. Our images have an HI column density sensitivity of $3 \times 10^{19}\,{\rm cm}^{-2}$ at $\sim$ arcmin resolution and an $M({\rm HI})$ detection limit of $10^7\,M_{\odot}$, which is an improvement of a factor of $\sim 10$ in sensitivity and 15 in resolution compared to previous surveys. To date, we have detected 15 HI sources, which include many new detections. We are comparing the HI detections and upper limits to known scaling relations to measure the HI depletion in this cluster.
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