13 citations · 13 across the 1 of their papers we have counts for
3 papers
Opacity modelling of heavy-metal hot subdwarfs. Photoionization of Sr, Y and Zr
L. Fernández-Menchero, C. S. Jeffery, C. A. Ramsbottom +1
Heavy-metal hot subdwarfs (sdB and sdO) represent a small group of stars with unusually high concentrations of trans-iron elements in their atmospheres, having abundances ~ 10000 t…
PSTGF : time-independent R-Matrix atomic electron-impact code
L. Fernández-Menchero, A. C. Conroy, C. P. Ballance +4
STGF is a community code employed for outer-region R-matrix calculations, describing electron-impact collisional processes. It is widely recognised that the original version of STG…
Ultraviolet emission lines of Si II in quasars --- investigating the "Si II disaster"
Sibasish Laha, Francis P. Keenan, Gary J. Ferland +2
The observed line intensity ratios of the Si II 1263 and 1307 Å multiplets to that of Si II 1814\,Å in the broad line region of quasars are both an order of magnitude larger than t…