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The Fornax cluster provides a uniquely compact laboratory to study thedetailed history of early-type galaxies and the role played by environment indriving their evolution and their transformation from late-type galaxies. Usingthe superb capabilities of the Multi Unit Spectroscopic Explorer on the VeryLarge Telescope, high-quality integral-field spectroscopic data were obtainedfor the inner regions of all the bright ($m_B\leq15$) galaxies within thevirial radius of Fornax. The stellar haloes of early-type galaxies are alsocovered out to about four effective radii. State-of-the-art stellar dynamicaland population modelling allows to aim in particular at better characterisingthe disc components of fast-rotating early-type galaxies, constraining radialvariations in the stellar initial-mass functions and measuring the stellar age,metallicity, and $\alpha$-element abundance of stellar haloes in clustergalaxies. This paper describes the sample selection, observations, and overallgoals of the survey, and provides initial results based on the spectroscopicdata, including the detailed characterisation of stellar kinematics andpopulations to large radii; decomposition of galaxy components directly viatheir orbital structure; the ability to identify globular clusters andplanetary nebulae, and derivation of high-quality emission-line diagnostics inthe presence of complex ionised gas.

The Fornax3D project: overall goals, galaxy sample, MUSE data analysis and initial results