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20132025
most citedAccurate determination of the free-free Gaunt factor; I - non-relativistic Gaunt factors

98 citations · 521 across the 33 of their papers we have counts for

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7 papers · 1 filter

astro-ph.HE2024

Cloudy and the High-Resolution Microcalorimeter Revolution: Optical, UV, and X-ray Spectra of One-electron Systems

Chamani M. Gunasekera, Peter A. M. van Hoof, Marios Chatzikos +1

With the launch of the XRISM microcalorimeter mission, space-based X-ray observations will achieve a record spectral resolving power of 1200. With this resolving…

astro-ph.HE2022★ 16 cited

X-ray spectroscopy in the microcalorimeter era 4: Optical depth effects on the soft X-rays studied with CLOUDY

Priyanka Chakraborty, Gary Ferland, Marios Chatzikos +4

In this paper, we discuss atomic processes modifying the soft X-ray spectra in from optical depth effects like photoelectric absorption and electron scattering suppressing the soft…

astro-ph.HE2021★ 21 cited

X-ray spectroscopy in the microcalorimeter era III: line formation under Case A, Case B, Case C, and Case D in H- and He-like iron for a photoionized cloud

Priyanka Chakraborty, Gary Ferland, Marios Chatzikos +2

Future microcalorimeter X-ray observations will resolve spectral features in unmatched detail. Understanding the line formation processes in the X-rays deserves much attention. The…

astro-ph.HE2020★ 16 cited

X-ray spectroscopy in the microcalorimeter era II: A new Diagnostic on Column Density from the Case A to B Transition in H- and He-like Iron

P. Chakraborty, M. Chatzikos, F. Guzmán +2

The Soft X-ray Spectrometer (SXS) on board \textit{Hitomi}, with the unprecedented resolving power of R1250, allowed the detection of members of the Fe XXV \ka\ complex emiss…

astro-ph.HE2020★ 21 cited

X-ray spectroscopy in the microcalorimeter era I: Effects of Fe XXIV Resonance Auger Destruction on Fe XXV K spectra

P. Chakraborty, G. J. Ferland, M. Chatzikos +2

We discuss the importance of Fe in determining the line intensities of the Fe XXV K complex in an optically thick cloud, and investigate the prediction of Liedahl (2005)…

astro-ph.HE2015★ 25 cited

Accurate determination of the free-free Gaunt factor. II - relativistic Gaunt factors

P. A. M. van Hoof, G. J. Ferland, R. J. R. Williams +4

When modelling an ionised plasma, all spectral synthesis codes need the thermally averaged free-free Gaunt factor defined over a very wide range of parameter space in order to prod…