Author

M. Leutenegger

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Preprint Aug 2026

X-ray grating spectroscopy as a mission enhancement

We propose to add instruments to any potential future X-ray mission with focussing optics that is considered in NASA's ASTRA framework. Such an instrument is a necessity to study AGN wind outflows and feedback, find the missing baryons, study the intergalactic medium, and analyze abundances and chemical bonds in dust g...

Hans Moritz Guenther, E. Behar, Joel N. Bregman et al. · 0 citations

Open access Sep 2026

Direct spectroscopic observation of matter falling onto a compact stellar object

GX 301–2 is an accreting x-ray pulsar with a massive hypergiant companion WRAY 977, embedded within a dense circumstellar environment. We report on detected redshifted hydrogen- and helium-like iron lines, together with transitions from lower ionization states, observed with XRISM/Resolve during an x-ray flare. Notably...

R. Rahin, R. Ballhausen, N. Islam et al. · Science Advances · 0 citations