239 citations · 987 across the 19 of their papers we have counts for
20 papers
Quantitative spectroscopy of extreme helium stars - Model atmospheres and a non-LTE abundance analysis of BD+102179?
Thomas Kupfer, Norbert Przybilla, Ulrich Heber +3
Extreme helium stars (EHe stars) are hydrogen-deficient supergiants of spectral type A and B. They are believed to result from mergers in double degenerate systems. In this paper w…
Discovery of a variable lead-rich hot subdwarf: UVO 0825+15
C. S. Jeffery, A. S. Baran, N. T. Behara +8
UVO0825+15 is a hot bright helium-rich subdwarf which lies in {\it K2} Field 5 and in a sample of intermediate helium-rich subdwarfs observed with {\it Subaru/HDS}. The {\it K2} li…
Discovery of extremely lead-rich subdwarfs: does heavy metal signal the formation of subdwarf B stars?
Naslim Neelamkodan, Simon Jeffery, Alan Hibbert +1
Hot subdwarfs represent a group of low-mass helium-burning stars formed through binary-star interactions and include some of the most chemically-peculiar stars in the Galaxy. Stell…
Extensive study of HD 25558, a long-period double-lined binary with two SPB components
Á. Sódor, P. De Cat, D. J. Wright +33
We carried out an extensive observational study of the Slowly Pulsating B (SPB) star, HD 25558. The ~2000 spectra obtained at different observatories, the ground-based and MOST sat…
An extremely peculiar hot subdwarf with a ten-thousand-fold excess of zirconium, yttrium, and strontium
Naslim N., C. S. Jeffery, N. T. Behara +1
Helium-rich subdwarf B (He-sdB) stars represent a small group of low-mass hot stars with luminosities greater than those of conventional subdwarf B stars, and effective temperature…
Abundance analyses of helium-rich subluminous B stars
N. Naslim, C. S. Jeffery, A. Ahmad +2
The connection between helium-rich hot subdwarfs of spectral types O and B (He-sdB) has been relatively unexplored since the latter were found in significant numbers in the 1980's.…