294 citations · 2.4k across the 40 of their papers we have counts for
Showing 2011Show all
3 papers · 1 filter
astro-ph.SR2011
Helium abundances and the helium isotope anomaly of sdB stars
S. Geier, U. Heber, H. Edelmann +5
Helium abundances and atmospheric parameters have been determined from high resolution spectra for a new sample of 46 bright hot subdwarf B (sdB) stars. The helium abundances have…
astro-ph.SR2011★ 57 cited
A deeply eclipsing detached double helium white dwarf binary
S. G. Parsons, T. R. Marsh, B. T. Gänsicke +2
Using Liverpool Telescope+RISE photometry we identify the 2.78 hour period binary star CSS 41177 as a detached eclipsing double white dwarf binary with a 21,100K primary star and a…
astro-ph.SR2011★ 1 cited
Substellar companions and the formation of hot subdwarf stars
S. Geier, U. Heber, A. Tillich +12
We give a brief review over the observational evidence for close substellar companions to hot subdwarf stars. The formation of these core helium-burning objects requires huge mass…