Behind the Paper

The real stories behind the latest research papers, from conception to publication, the highs and the lows

Solar-Assisted Fuel Production in Microgravity Environment

Future long-term space travel and cis-lunar research platforms such as the Deep Space Gateway require a reliable life support system and - similarly to our demands on Earth - a renewable energy source. The production of so-called ‘solar fuels’, i.e. fuels such as hydrogen or long-chain hydrocarbons generated only from sunlight, water and carbon dioxide is currently investigated for terrestrial applications. These solar fuels are promising candidates for meeting the global quest for alternative energy sources. Currently, the most efficient systems comprise the ones operating according to the natural photosynthetic process: semiconductors are employed as light absorbers which transfer electrons upon photoexcitation to integrated electrocatalysts, catalyzing the respective half-cell reaction of water-splitting (photoanode) or fuel production (photocathode). Although, these systems are interesting as well for space applications from the point of oxygen and fuel generation, solar fuel production in microgravity environment has not been realized and investigated yet.
Go to the profile of Katharina Brinkert
Jul 10, 2018

The quasi-linear nearby Universe

Cosmology is the science of the largest possible scales - temporal and spatial. Yet, the last two decades have seen the rise of a new approach, coined as near field cosmology, which advocates that studies of the ‘near field’, namely our local ‘patch’ of the Universe, can teach us about the Universe at large. Our paper presents a new approach to cosmography - the non-linear mapping of the total matter distribution of the local Universe, out to distances of roughly half a billion lightyears by means of constrained simulations. The paper brings the previously separated approaches: linear cosmography and massively non-linear simulations, and amalgamates them into one - the quasi-linear reconstruction of the near field. The Constrained Local UniversE Simulations (CLUES) project operates within this context. It aims at mapping - in space and time - the near field from observational data and within the framework of the standard model of cosmology. The data consists of the Cosmicflows database of galaxy distances and velocities and the essence of the standard model, namely a flat universe made of dark energy (Λ) and cold dark matter (the “ΛCDM” model). How local is ‘local’ is context dependent – for simulations such as those in the CLUES it ranges from scales as small as our Milky Way galaxy out to distances of roughly a billion lightyears from us.
Go to the profile of Noam Libeskind
Jul 09, 2018