132 citations · 248 across the 5 of their papers we have counts for
8 papers · 1 filter
The EREBOS project -- Investigating the effect of substellar and low-mass stellar companions on late stellar evolution
V. Schaffenroth, B. N. Barlow, S. Geier +14
Eclipsing post-common envelope binaries are highly important for resolving the poorly understood, very short-lived common envelope phase. Most hot subdwarfs (sdO/Bs) are the bare H…
The MUCHFUSS photometric campaign
V. Schaffenroth, S. Geier, U. Heber +4
Hot subdwarfs (sdO/Bs) are the helium-burning cores of red giants, which lost almost all of their hydrogen envelopes. This mass loss is often triggered by common envelope interacti…
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…