Patricia B. Cho
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View article: Spectral line identification from a photoionised silicon plasma in emission
Spectral line identification from a photoionised silicon plasma in emission Open
Next-generation X-ray satellite telescopes such as XRISM, NewAthena and Lynx will enable observations of exotic astrophysical sources at unprecedented spectral and spatial resolution. Proper interpretation of these data demands that the ac…
View article: Experimental methods to test photoionized plasma models in emission
Experimental methods to test photoionized plasma models in emission Open
The expanding foil photoionized plasma platform was developed on the Z-machine at Sandia National Laboratories to produce terrestrial photoionized plasmas at some of the same conditions as those observed in astrophysical black hole accreti…
View article: Simulation of Stark-broadened Hydrogen Balmer-line Shapes for DA White Dwarf Synthetic Spectra
Simulation of Stark-broadened Hydrogen Balmer-line Shapes for DA White Dwarf Synthetic Spectra Open
White dwarfs (WDs) are useful across a wide range of astrophysical contexts. The appropriate interpretation of their spectra relies on the accuracy of WD atmosphere models. One essential ingredient of atmosphere models is the theory used f…
View article: Variable Heating and Flaring of Three Redback Millisecond Pulsar Companions
Variable Heating and Flaring of Three Redback Millisecond Pulsar Companions Open
We monitor established and putative redback millisecond pulsars (MSPs) in time-series photometry, repeatedly covering their 5–6 hr orbital light curves in r ′ or R . On timescales of months, PSR J1048+2339 and XMMU J083850.38−282756.8 exhi…
View article: Power Excursion Mitigation for Flexgrid Defragmentation With Machine Learning
Power Excursion Mitigation for Flexgrid Defragmentation With Machine Learning Open
Flexgrid optical networking relies on spectrum defragmentation to groom channel wavelengths and improve spectral efficiency. Various defragmentation methods—hop, make-before-break, and sweep—interact with the power dynamics of erbium-doped…
View article: Dynamic mitigation of EDFA power excursions with machine learning
Dynamic mitigation of EDFA power excursions with machine learning Open
Dynamic optical networking has promising potential to support the rapidly changing traffic demands in metro and long-haul networks. However, the improvement in dynamicity is hindered by wavelength-dependent power excursions in gain-control…