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In the core of the Fornax cluster, on the West side of NGC1399, we havedetected a previously unknown region of intra-cluster light (ICL). It is madeup by several faint ($\mu_r \simeq 28 - 29$~mag/arcsec$^2$) {\it patches} ofdiffuse light. The bulk of the ICL is located in between the three brightgalaxies in the core, NGC1387, NGC1379 and NGC1381, at $10\leq R \leq40$~arcmin($\sim 58 - 230$~kpc) from the central galaxy NGC~1399. We show that the ICL isthe counterpart in the diffuse light of the known over-density in thepopulation of blue globular clusters (GCs). The total g-band luminosity of theICL is $L_g\simeq 8.3 \times 10^{9}$ $L_{\odot}$, which is $\sim5\%$ of thetotal luminosity of NGC1399. This is consistent with the fraction of the blueGCs in the same region of the cluster. The ICL has $g-r \sim 0.7$~mag, which issimilar to the colors in the halo of the bright galaxies in the cluster core.The new findings were compared with theoretical predictions for the ICLformation and they support a scenario in which the intra-cluster populationdetected in the core of the Fornax cluster is build up by the tidal strippingof material (stars and GCs) from galaxy outskirts in a close passage with thecD. Moreover, the diffuse form of the ICL and its location close to the core ofthe cluster is expected in a dynamically evolved cluster as Fornax.

Intra-cluster patches of baryons in the core of the Fornax cluster