17 citations · 22 across the 6 of their papers we have counts for
6 papers
The SALT survey of helium-rich hot subdwarfs: unsupervised classification and kinematic analysis
Asish Philip Monai, C. Simon Jeffery
Hydrogen-deficient stars form sequences across the HR diagram from cool R CrB stars to helium-rich hot subdwarfs and PG1159 stars, tracing multiple evolution pathways. The Southern…
The SALT survey of helium-rich hot subdwarfs: final sample and classification
C. Simon Jeffery, Matti Dorsch, Asish Philip Monai +3
A medium-resolution spectroscopic survey of helium-rich hot subdwarfs has been carried out using the Southern African Large Telescope (SALT). Objectives include the discovery of ex…
A search for close binary systems in the SALT survey of hydrogen-deficient stars using {\it TESS}
E. J. Snowdon, C. S. Jeffery, S. Schlagenhauf +1
The {\it TESS} periodograms of the SALT survey catalogue of hydrogen-deficient stars were searched for evidence of short-period variability. Periodic light curve variations were id…
Discovery of three magnetic helium-rich hot subdwarfs with SALT
M. Dorsch, C. S. Jeffery, A. Philip Monai +6
Magnetic fields with strengths ranging from 300 to 500 kG have recently been discovered in a group of four extremely similar helium-enriched hot subdwarf (He-sdO) stars. Besides th…
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…
Temperature and gravity of the pulsating extreme helium star LSS 3184 (BX Cir) through its pulsation cycle
Vincent M. Woolf, C. Simon Jeffery
We report the analysis of optical spectra of the extreme helium star LSS 3184 (BX Cir) to determine its effective temperature and gravity throughout its pulsation cycle. The spectr…