205 citations · 1.4k across the 44 of their papers we have counts for
5 papers · 1 filter
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…
The slowly pulsating B-star 18 Peg: A testbed for upper main sequence stellar evolution
Andreas Irrgang, Apurva Deshpande, Sabine Moehler +2
The predicted width of the upper main sequence in stellar evolution models depends on the empirical calibration of the convective overshooting parameter. Despite decades of discuss…
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…
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…
PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
D. L. Kaplan, T. Kupfer, D. J. Nice +32
PSR J10240719 is a millisecond pulsar that was long thought to be isolated. However, puzzling results concerning its velocity, distance, and low rotational period derivative hav…