53 citations · 121 across the 3 of their papers we have counts for
6 papers
Kinematics of Subluminous O and B Stars by Surface Helium Abundance
P. Martin, C. S. Jeffery, Naslim N. +1
The majority of hot subdwarf stars are low-mass core-helium-burning stars. Their atmospheres are generally helium deficient; however a minority have extremely helium-rich surfaces.…
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…
KIC 10449976: discovery of an extreme-helium subdwarf in the Kepler field
C. S. Jeffery, G. Ramsay, N. Naslim +6
Optical spectroscopy of the blue star KIC 10449976 shows that it is an extremely helium-rich subdwarf with effective temperature T=40000+/-300 K and surface gravity log g=5.3+/-0.1…
The helium-rich subdwarf CPD-20 1123: a post-common envelope binary evolving onto the extended horizontal branch
N. Naslim, S. Geier, C. S. Jeffery +3
Subluminous B stars come in a variety of flavours including single stars, close and wide binaries, and pulsating and non-pulsating variables. A majority have helium-poor surfaces (…
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.…