The basic ideas of the B-spline R-matrix (BSR) approach are reviewed, and the use of the
method is illustrated with a variety of applications to atomic structure, electron–atom …

We describe the 2017 release of the spectral synthesis code CLOUDY, summarizing the
many improvements to the scope and accuracy of the physics which have been made since …

We report detections of the [O iii] λ4364 auroral emission line for 16 galaxies at z= 2.1–8.7,
measured from JWST/NIRSpec observations obtained as part of the Cosmic Evolution Early …

We present chemical abundance ratios of 70 star-forming galaxies at z∼ 4–10 observed by
the JWST/NIRSpec Early Release Observations, GLASS, and CEERS programs. Among the …

We present version 8 of the CHIANTI database. This version includes a large amount of new
data and ions, which represent a significant improvement in the soft X-ray, extreme UV …

Using observations from the MOSFIRE Deep Evolution Field survey, we investigate the
physical conditions of star-forming regions in z∼ 2.3 galaxies, specifically the electron …

We present a detailed study of the rest-optical (3600–7000 Å) nebular spectra of∼ 380 star-
forming galaxies at $ z\simeq 2\mbox {--} 3$, obtained with Keck/Multi-object Spectrometer …

H ii regions are ionized nebulae surrounding massive stars. They exhibit a wealth of
emission lines that form the basis for estimation of chemical composition. Heavy elements …

Recently, Nicholls et al., inspired by in situ observations of solar system astrophysical
plasmas, suggested that the electrons in H ii regions are characterized by a κ-distribution of …

Nearby dwarf galaxies provide a unique laboratory in which to test stellar population models
below Z⊙/2. Such tests are particularly important for interpreting the surprising high …