384 citations · 862 across the 20 of their papers we have counts for
20 papers
EC 19529-4430: SALT identifies the most carbon- and metal-poor extreme helium star
Simon Jeffery, Laura Scott, Asish Philip Monai +2
EC 19529-4430 was identified as a helium-rich star in the Edinburgh-Cape Survey of faint-blue objects and subsequently resolved as a metal-poor extreme helium (EHe) star in the SAL…
Spectroscopic analysis of BPS CS 22940-0009: connecting evolved helium stars
E. J. Snowdon, L. J. A. Scott, C. S. Jeffery +1
BPS CS 22940-0009 is a helium-rich B-star that shares characteristics with both helium-rich B subdwarfs and extreme helium stars. The optical spectrum of BPS CS 22940-0009 has been…
EC 22536-5304: a lead-rich and metal-poor long-period binary
M. Dorsch, C. S. Jeffery, A. Irrgang +2
Helium-burning hot subdwarf stars of spectral types O and B (sdO/B) are thought to be produced through various types of binary interaction. The helium-rich hot subdwarf star EC2253…
The M dwarf problem: Fe and Ti abundances in a volume-limited sample of M dwarf stars
Vincent M. Woolf, George Wallerstein
We report iron and titanium abundance measurements from high resolution spectra in a volume-limited sample of 106 M0 and M0.5 dwarf stars. The sample includes stars north of the ce…
A search for heavy-metal stars: abundance analyses of hot subdwarfs with Subaru
N. Naslim, C. S. Jeffery, V. M. Woolf
The discovery of extremely zirconium- and lead-rich surfaces amongst a small subgroup of hot subdwarfs has provoked questions pertaining to chemical peculiarity in hot star atmosph…
Abundance analyses of the new R Coronae Borealis stars: ASAS-RCB-8 and ASAS-RCB-10
B. P. Hema, Gajendra Pandey, Devika Kamath +3
Abundance analyses of the two newly discovered R Coronae Borealis (RCB) stars ASAS-RCB-8 and ASAS-RCB-10 were conducted using high-resolution optical spectra and model atmospheres.…