activity
20122024
most citedThe fastest unbound star in our Galaxy ejected by a thermonuclear supernova

132 citations · 583 across the 19 of their papers we have counts for

collaborators

19 papers

astro-ph.SR2024★ 11 cited

A spectroscopic and kinematic survey of fast hot subdwarfs

S. Geier, U. Heber, A. Irrgang +19

Hot subdwarfs (sdO/B) are the stripped helium cores of red giants formed by binary interactions. Close hot subdwarf binaries with massive white dwarf companions have been proposed…

astro-ph.SR2019★ 52 cited

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…

astro-ph.SR2018★ 22 cited

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…

astro-ph.SR2017★ 22 cited

Spectroscopic twin to the hypervelocity sdO star US 708 and three fast sdB stars from the Hyper-MUCHFUSS project

E. Ziegerer, U. Heber, S. Geier +4

Important tracers for the dark matter halo of the Galaxy are hypervelocity stars (HVSs), which are faster than the local escape velocity of the Galaxy and their slower counterparts…

astro-ph.SR2016

Close binary progenitors and ejected companions of thermonuclear supernovae

S. Geier, T. Kupfer, U. Heber +8

Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massiv…

astro-ph.SR2016

Hot subdwarf stars and their connection to thermonuclear supernovae

S. Geier, T. Kupfer, E. Ziegerer +4

Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massiv…