XRISM observations reveal orbital-phase-dependent variability in highly ionized iron absorption lines and tentative short-term changes on few-second timescales in Cygnus X-1, indicating structural variations in the stellar wind.
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XRISM observations of NGC 7213 indicate that highly ionized iron lines cannot be uniquely attributed to photoionization or collisional ionization, with possible evidence that emitting gas density decreases at lower Eddington ratios.
citing papers explorer
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XRISM High-Resolution X-ray Spectroscopy of Cygnus X-1 -- Orbital and Short-Term Variability of Iron Absorption
XRISM observations reveal orbital-phase-dependent variability in highly ionized iron absorption lines and tentative short-term changes on few-second timescales in Cygnus X-1, indicating structural variations in the stellar wind.
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A XRISM Study of Highly Ionized Iron Emission Lines from the Low-Eddington-ratio AGN in NGC 7213
XRISM observations of NGC 7213 indicate that highly ionized iron lines cannot be uniquely attributed to photoionization or collisional ionization, with possible evidence that emitting gas density decreases at lower Eddington ratios.