132 citations · 248 across the 5 of their papers we have counts for
6 papers
An extremely fast halo hot subdwarf star in a wide binary system
Péter Németh, Eva Ziegerer, Andreas Irrgang +4
New spectroscopic observations of the halo hyper-velocity star candidate SDSS J121150.27+143716.2 ( mag) revealed a cool companion to the hot subdwarf primary. The compone…
Candidate hypervelocity stars of spectral type G and K revisited
E. Ziegerer, M. Volkert, U. Heber +3
Hypervelocity stars (HVS) move so fast that they are unbound to the Galaxy. When they were first discovered in 2005, dynamical ejection from the supermassive black hole (SMBH) in t…
The fastest unbound star in our Galaxy ejected by a thermonuclear supernova
S. Geier, F. Fürst, E. Ziegerer +17
Hypervelocity stars (HVS) travel with velocities so high, that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US…
The enigmatic He-sdB pulsator LS IV14116: new insights from the VLT
S. K. Randall, S. Bagnulo, E. Ziegerer +2
The intermediate Helium subdwarf B star LS IV14116 is a unique object showing extremely peculiar atmospheric abundances as well as long-period pulsations that cannot be…
The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
S. Geier, T. Kupfer, U. Heber +13
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to find sdBs with compact companions like massive white dwarfs, neutron stars or bl…
Discovery of the closest hot subdwarf binary with white dwarf companion
S. Geier, T. R. Marsh, B. H. Dunlap +13
We report the discovery of an extremely close, eclipsing binary system. A white dwarf is orbited by a core He-burning compact hot subdwarf star with a period as short as $\simeq0.0…