3 papers
astro-ph.SR2026
Evidence for neutron capture in heavy-metal hot subdwarfs: Far-UV spectroscopy of EC22536-5304 and LSIV-14 116
M. Dorsch, C. S. Jeffery, J. Deprince +8
Most hot subdwarfs (sdO/B) are low-mass core-helium-burning stars formed through binary interaction. A subgroup of intermediate He-rich sdOBs shows extreme heavy-metal (Z>30) enric…
astro-ph.SR2025
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…
astro-ph.SR2025
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…