1 citations · 3 across the 6 of their papers we have counts for
Showing 2008Show all
3 papers · 1 filter
astro-ph2008★ 1 cited
Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges
S. Geier, U. Heber, R. Napiwotzki
The formation of sdBs is still puzzling, as is the chemical composition of their atmospheres. While helium and other light elements are depleted relative to solar values, heavy ele…
astro-ph2008
Binary sdB Stars with Massive Compact Companions
S. Geier, C. Karl, H. Edelmann +2
The masses of compact objects like white dwarfs, neutron stars and black holes are fundamental to astrophysics, but very difficult to measure. We present the results of an analysis…
astro-ph2008
Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries
S. Geier, U. Heber, R. Napiwotzki
We present new results from follow-up time-resolved spectroscopy of radial velocity variable hot subdwarfs from the SPY project. Medium resolution spectra were taken at the ESO NTT…