Instrumentation Projects of the Observational Astronomy group
4MOST (de Jong et al. 2019) is a state-of-the-art, high-multiplex, fibre-fed, optical spectroscopic survey facility currently under construction for ESO’s 4-m VISTA telescope. Its field-of-view will be large enough to survey a large fraction of the southern sky in a few years, and its multiplex of 2400 fibres enables surveys of millions of objects. During the first five years of operations 4MOST will be used to execute a comprehensive, integrated programme of both Galactic and extragalactic Public Surveys, including WAVES, which is co-led by J. Liske. We largely funded one of 4MOST's two low-resolution spectrographs, and we lead or contribute to several work packages in the areas of scientific planning and software development. J. Liske is also the Chair of the 4MOST Science Coordination Board.
HIRES (Marconi et al. 2018) is the optical and near-infrared high-resolution spectrograph for the Extremely Large Telescope, the world's largest optical and infrared telescope (currently under construction in Chile by the European Southern Observatory). This instrument will address a number of compelling science cases, including the characterisation of the atmospheres of extrasolar planets and the search for variations in some of the fundamental constants of physics. As a goal, this instrument will also be able to provide the first measurement of the so-called "redshift drift". The project has completed its conceptual design phase and is now awaiting the approval of its detailed design phase by ESO. During the conceptual design phase, J. Liske led the Science Advisory Team's working group on cosmology and fundamental physics.