The evolution of structure and feedback with Arcus

摘要: Arcus is a NASA/MIDEX mission under development in response to the anticipated 2016 call for proposals. It freeflying, soft X-ray grating spectrometer with highest-ever spectral resolution 8-51 A (0.24 – 1.55 keV) energy range. The bandpass includes most sensitive tracers of diffuse million-degree gas: lines from O VII and VIII, H- He-like C, N, Ne Mg, unique density- temperature-sensitive Si Fe ions. These capabilities enable an advance our understanding formation evolution baryons Universe that unachievable any other present or planned observatory. will address multiple key questions posed Decadal Survey1 NASA’s 2013 Roadmap2: How do cycle out galaxies? black holes stars influence their surroundings cosmic web via feedback? stars, circumstellar disks exoplanet atmospheres form evolve? data answer these by leveraging recent developments off-plane gratings silicon pore optics measure spectra at high wide range sources within beyond Milky Way. CCDs strong Suzaku heritage combined electronics based on Swift detect dispersed X-rays. support broad astrophysical research program, its superior sensitivity X-rays complement forthcoming Athena calorimeter, which have comparably above 2 keV.