91 citations · 1.9k across the 76 of their papers we have counts for
77 papers
Abundance analysis of a nitrogen-rich extreme-helium hot subdwarf from the SALT survey
L. J. A. Scott., C. S. Jeffery, D. Farren +2
We have performed a detailed spectral analysis of the helium-rich hot subdwarf EC 20187-4939 using data obtained in the SALT survey of helium-rich hot subdwarfs. We have measured i…
Hot white dwarfs and pre-white dwarfs discovered with SALT
C. S. Jeffery, K. Werner, D. Kilkenny +3
The Southern African Large Telescope (SALT) survey of helium-rich hot subdwarfs aims to explore evolutionary pathways amongst groups of highly-evolved stars. The selection criteria…
TESS uncloaks the secondaries in hydrogen-deficient binaries
C. Simon Jeffery
Sgr is the prototype of four known hydrogen-deficient binary (HdB) systems. These are characterised by a hydrogen-deficient A-type primary, variable hydrogen emission li…
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…
Spectrum synthesis for radially pulsating stars with shocked atmospheres
C. Simon Jeffery
SPEC_PULS describes a suite of computer programs to simulate the emergent spectrum from a radially-pulsating star. It combines a Christy-type non-linear pulsation code with classic…
The OmegaWhite Survey for Short-Period Variable Stars VII: High amplitude, short period blue variables
G. Ramsay, P. A. Woudt, T. Kupfer +11
Blue Large Amplitude Pulsators (BLAPs) are a relatively new class of blue variable stars showing periodic variations in their light curves with periods shorter than a few tens of m…