73 citations · 344 across the 11 of their papers we have counts for
7 papers · 2 filters
Subaru and Swift observations of V652 Herculis: resolving the photospheric pulsation
C. S. Jeffery, D. Kurtz, H. Shibahashi +4
High resolution spectroscopy with the Subaru High Dispersion Spectrograph, and Swift ultraviolet photometry are presented for the pulsating extreme helium star V652\,Her. Swift pro…
Radial velocity measurements of the pulsating zirconium star: LS IV -14 116
C. Simon Jeffery, Amir Ahmad, Naslim Neelamkodan +1
The helium-rich hot subdwarf LS IV -14 116 shows remarkably high surface abundances of zirconium, yttrium, strontium, and germanium, indicative of strong chemical stratification in…
Post-merger evolution of carbon-oxygen + helium white dwarf binaries and the origin of R Coronae Borealis and extreme helium stars
Xianfei Zhang, C. Simon Jeffery, Xuefei Chen +1
Orbital decay by gravitational-wave radiation will cause some close-binary white dwarfs (WDs) to merge within a Hubble time. The results from previous hydrodynamical WD-merger simu…
White paper: Gaia and the end states of stellar evolution
M. A Barstow, S. L. Casewell, S. Catalan +18
This is the product of a Gaia GREAT workshop on "Gaia and the end states of stellar evolution" held at the University of Leicester in April 2011.
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…
Spectroscopic Orbital Elements for the Helium-Rich Subdwarf Binary PG1544+488
H. Tuğça Şener, C. Simon Jeffery
PG1544+488 is an exceptional short-period spectroscopic binary containing two subdwarf B stars. It is also exceptional because the surfaces of both components are extremely helium-…