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Optical design of the multi-wavelength imaging coronagraph Metis for the solar orbiter mission
Heinzel, P.; Solanki, S. K.; Romoli, M. +31 more
This paper describes the innovative optical design of the Metis coronagraph for the Solar Orbiter ESA-NASA mission. Metis is a multi-wavelength, externally occulted telescope for the imaging of the solar corona in both the visible and ultraviolet wavelength ranges. Metis adopts a novel occultation scheme for the solar disk, that we named "inverse …
Soft proton scattering at grazing incidence from X-ray mirrors: analysis of experimental data in the framework of the non-elastic approximation
Santangelo, Andrea; Molendi, Silvano; Lotti, Simone +9 more
Astronomical X-ray observatories with grazing incidence optics face the problem of pseudo-focusing of low energy protons from the mirrors towards the focal plane. Those protons constitute a variable, unpredictable component of the non X-ray background that strongly affects astronomical observations and a correct estimation of their flux at the foc…
Optimized cutting off transit algorithm to study stellar rotation from PLATO mission light curves
Castro, Matthieu; de Almeida, Leandro; Anthony, Francys +4 more
Measuring the stellar rotation of one of the components in eclipsing binaries (EBs) or planetary systems is a challenge task. The difficulty is mainly due to the complexity of analyzing, in the same light curve, the signal from the stellar rotation mixed with the transit signal of a stellar or substellar companion, like a brown dwarf or planet. Th…
CHESS: An innovative concept for high-resolution, far-UV spectroscopy
France, Kevin; Youngblood, Allison; Fleming, Brian +4 more
The space ultraviolet (UV) is a critical astronomical observing window, where a multitude of atomic, ionic, and molecular signatures provide crucial insight into planetary, interstellar, stellar, intergalactic, and extragalactic objects. The next generation of large space telescopes require highly sensitive, moderate-to-high resolution UV spectrog…
EREBUS: the EuRopean Extinction BUmp Survey
Shipman, R. F.; Kargl, G.; Skalidis, R. +14 more
Dust in the Interstellar Medium (ISM) is intimately linked to the life cycle of stars. Despite being of such fundamental importance to galaxy evolution, the dynamic behaviour and composition of the ISM are not yet fully understood. Observations of reddened Milky Way OB stars have revealed a strong UV extinction feature around 2175 Å and a precipit…