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Galaxy peculiar velocities are a unique means to map the dark matter distribution on large scales in the Local Universe. Their accurate knowledge will further become critical to reduce the uncertainties of type Ia supernovae distances measured by next generation surveys, such as LSST or WFIRST. Finally, future peculiar velocity surveys mapping the dynamics of the nearby universe are expected be highly complementary to spectroscopic redshift surveys such as PFS, DESI, Euclid, or WFIRST, designed to chart the distant Universe; their combined use will be decisive to control the systematics to robustly assess the nature dark energy and possible deviations from General Relativity. Besides, the current amount and high quality of astronomical data is imposing to strengthen the link between extragalactic astrophysics and cosmology: mapping the local peculiar velocity field and eventually resolve the kinematics of galaxies on large fields is nowadays crucial to investigate the formation of galaxy clusters from their outskirts possibly down to their core.

This workshop is aimed at discussing the science case and possible MOS and IFS technologies for a Low-Redshift survey from Calar Alto (LORCA), viz. a peculiar velocity survey from the northern hemisphere designed to complement the TAIPAN galaxy survey operated from the south. The workshop will be concluded by a kick-off meeting for an instrumental proposal dedicated to the Schmidt and 3.50m telescopes at Calar Alto.

Two visits at LAM and Winlight System facilities are planned.