Laboratory Astrophysics Needs for X-ray Grating Spectrometers

Le résumé fourni par la source

The current generation of X-ray grating spectrometers on Chandra and XMM-Newton has modest sensitivity, largely due to a combination of modest resolution (typically 300-1000) and low efficiency (≲ 10%).The next generation of X-ray gratings, however, has already demonstrated far higher resolution and efficiency, capabilities that will transform the field.These gratings are planned for use on Explorers, Probes, and Flagship missions, so the time is right to prepare for the high-quality spectral data that will be returned by these missions.The highest-resolution grating data available, from the Chandra gratings, have already shown the limitations of existing atomic data for modeling; improvements are needed in laboratory measurements of wavelengths, radiative and collisional transition rates, as well as ionization and recombination crosssections.To prepare for these proposed missions, significant progress needs to be made in understanding the theoretical atomic physics as well.This white paper, in concert with a paper focusing on microcalorimeter missions, will summarize the work that has been done thus far in the field of laboratory X-ray astrophysics, with the goal of identifying the most critical tasks that are still outstanding.This includes tracing science requirements from missions such as Arcus, XGS-P, and Lynx and identifying the laboratory measurements needed to achieve them.We discuss long-term methods to prioritize these needs, along with our initial assessments, and indicate new facilities that will be required.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.